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</pre><pre class="rust ">
<span class="doccomment">//! Interfaces with a buffer.</span>
<span class="kw">use</span> <span class="ident">std</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">marker</span>::<span class="ident">PhantomData</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">ops</span>::{<span class="ident">Deref</span>, <span class="ident">DerefMut</span>, <span class="ident">Range</span>};
<span class="kw">use</span> <span class="ident">core</span>::{<span class="self">self</span>, <span class="ident">Error</span> <span class="kw">as</span> <span class="ident">OclCoreError</span>, <span class="prelude-ty">Result</span> <span class="kw">as</span> <span class="ident">OclCoreResult</span>, <span class="ident">OclPrm</span>, <span class="ident">Mem</span> <span class="kw">as</span> <span class="ident">MemCore</span>,
<span class="ident">MemFlags</span>, <span class="ident">MemInfo</span>, <span class="ident">MemInfoResult</span>, <span class="ident">BufferRegion</span>, <span class="ident">MapFlags</span>, <span class="ident">AsMem</span>, <span class="ident">MemCmdRw</span>, <span class="ident">MemCmdAll</span>,
<span class="ident">ClNullEventPtr</span>};
<span class="kw">use</span> ::{<span class="ident">Context</span>, <span class="ident">Queue</span>, <span class="ident">FutureMemMap</span>, <span class="ident">MemMap</span>, <span class="ident">Event</span>, <span class="ident">RwVec</span>, <span class="ident">FutureReadGuard</span>, <span class="ident">FutureWriteGuard</span>,
<span class="ident">SpatialDims</span>};
<span class="kw">use</span> <span class="ident">standard</span>::{<span class="ident">ClNullEventPtrEnum</span>, <span class="ident">ClWaitListPtrEnum</span>, <span class="ident">HostSlice</span>};
<span class="kw">use</span> <span class="ident">error</span>::{<span class="ident">Error</span> <span class="kw">as</span> <span class="ident">OclError</span>, <span class="prelude-ty">Result</span> <span class="kw">as</span> <span class="ident">OclResult</span>};
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span><span class="op">=</span><span class="string">"opencl_vendor_mesa"</span>))]</span>
<span class="kw">use</span> <span class="ident">ffi</span>::<span class="ident">cl_GLuint</span>;
<span class="kw">fn</span> <span class="ident">check_len</span>(<span class="ident">mem_len</span>: <span class="ident">usize</span>, <span class="ident">data_len</span>: <span class="ident">usize</span>, <span class="ident">offset</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">OclResult</span><span class="op"><</span>()<span class="op">></span> {
<span class="kw">if</span> <span class="ident">offset</span> <span class="op">>=</span> <span class="ident">mem_len</span> {
<span class="prelude-val">Err</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">"ocl::Buffer::enq(): Offset out of range. \
(mem_len: {}, data_len: {}, offset: {}"</span>, <span class="ident">mem_len</span>, <span class="ident">data_len</span>, <span class="ident">offset</span>).<span class="ident">into</span>())
} <span class="kw">else</span> <span class="kw">if</span> <span class="ident">data_len</span> <span class="op">></span> (<span class="ident">mem_len</span> <span class="op">-</span> <span class="ident">offset</span>) {
<span class="prelude-val">Err</span>(<span class="string">"ocl::Buffer::enq(): Data length exceeds buffer length."</span>.<span class="ident">into</span>())
} <span class="kw">else</span> {
<span class="prelude-val">Ok</span>(())
}
}
<span class="doccomment">/// A buffer command error.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Fail</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">BufferCmdError</span> {
<span class="attribute">#[<span class="ident">fail</span>(<span class="ident">display</span> <span class="op">=</span> <span class="string">"A rectangular map is not a valid operation. \
Please use the default shape, linear."</span>)]</span>
<span class="ident">RectUnavailable</span>,
<span class="attribute">#[<span class="ident">fail</span>(<span class="ident">display</span> <span class="op">=</span> <span class="string">"No queue specified."</span>)]</span>
<span class="ident">NoQueue</span>,
<span class="attribute">#[<span class="ident">fail</span>(<span class="ident">display</span> <span class="op">=</span> <span class="string">"Buffer already mapped."</span>)]</span>
<span class="ident">AlreadyMapped</span>,
<span class="attribute">#[<span class="ident">fail</span>(<span class="ident">display</span> <span class="op">=</span> <span class="string">"Unable to map this buffer. Must create with either the \
MEM_USE_HOST_PTR or MEM_ALLOC_HOST_PTR flag."</span>)]</span>
<span class="ident">MapUnavailable</span>,
<span class="attribute">#[<span class="ident">fail</span>(<span class="ident">display</span> <span class="op">=</span> <span class="string">"ocl-core error: {}"</span>, <span class="ident">_0</span>)]</span>
<span class="ident">Ocl</span>(<span class="attribute">#[<span class="ident">cause</span>]</span> <span class="ident">OclCoreError</span>)
}
<span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">OclCoreError</span><span class="op">></span> <span class="kw">for</span> <span class="ident">BufferCmdError</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">err</span>: <span class="ident">OclCoreError</span>) <span class="op">-></span> <span class="ident">BufferCmdError</span> {
<span class="ident">BufferCmdError</span>::<span class="ident">Ocl</span>(<span class="ident">err</span>)
}
}
<span class="doccomment">/// A queue or context reference.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">QueCtx</span><span class="op"><</span><span class="lifetime">'o</span><span class="op">></span> {
<span class="ident">Queue</span>(<span class="ident">Queue</span>),
<span class="ident">Context</span>(<span class="kw-2">&</span><span class="lifetime">'o</span> <span class="ident">Context</span>),
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'o</span><span class="op">></span> <span class="ident">QueCtx</span><span class="op"><</span><span class="lifetime">'o</span><span class="op">></span> {
<span class="doccomment">/// Returns a context regardless of the contained variant.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">context_cloned</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Context</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">QueCtx</span>::<span class="ident">Queue</span>(<span class="kw-2">ref</span> <span class="ident">q</span>) <span class="op">=></span> <span class="ident">q</span>.<span class="ident">context</span>(),
<span class="ident">QueCtx</span>::<span class="ident">Context</span>(<span class="ident">c</span>) <span class="op">=></span> <span class="ident">c</span>.<span class="ident">clone</span>(),
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'o</span><span class="op">></span> <span class="ident">From</span><span class="op"><</span><span class="ident">Queue</span><span class="op">></span> <span class="kw">for</span> <span class="ident">QueCtx</span><span class="op"><</span><span class="lifetime">'o</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">q</span>: <span class="ident">Queue</span>) <span class="op">-></span> <span class="ident">QueCtx</span><span class="op"><</span><span class="lifetime">'o</span><span class="op">></span> {
<span class="ident">QueCtx</span>::<span class="ident">Queue</span>(<span class="ident">q</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'o</span><span class="op">></span> <span class="ident">From</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Queue</span><span class="op">></span> <span class="kw">for</span> <span class="ident">QueCtx</span><span class="op"><</span><span class="lifetime">'o</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">q</span>: <span class="kw-2">&</span><span class="ident">Queue</span>) <span class="op">-></span> <span class="ident">QueCtx</span><span class="op"><</span><span class="lifetime">'o</span><span class="op">></span> {
<span class="ident">QueCtx</span>::<span class="ident">Queue</span>(<span class="ident">q</span>.<span class="ident">clone</span>())
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'o</span><span class="op">></span> <span class="ident">From</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'o</span> <span class="ident">Context</span><span class="op">></span> <span class="kw">for</span> <span class="ident">QueCtx</span><span class="op"><</span><span class="lifetime">'o</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">c</span>: <span class="kw-2">&</span><span class="lifetime">'o</span> <span class="ident">Context</span>) <span class="op">-></span> <span class="ident">QueCtx</span><span class="op"><</span><span class="lifetime">'o</span><span class="op">></span> {
<span class="ident">QueCtx</span>::<span class="ident">Context</span>(<span class="ident">c</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'o</span><span class="op">></span> <span class="ident">From</span><span class="op"><</span><span class="ident">QueCtx</span><span class="op"><</span><span class="lifetime">'o</span><span class="op">>></span> <span class="kw">for</span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Queue</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">qc</span>: <span class="ident">QueCtx</span><span class="op"><</span><span class="lifetime">'o</span><span class="op">></span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Queue</span><span class="op">></span> {
<span class="kw">match</span> <span class="ident">qc</span> {
<span class="ident">QueCtx</span>::<span class="ident">Queue</span>(<span class="ident">q</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">q</span>),
<span class="ident">QueCtx</span>::<span class="ident">Context</span>(_) <span class="op">=></span> <span class="prelude-val">None</span>,
}
}
}
<span class="doccomment">/// The type of operation to be performed by a command.</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">BufferCmdKind</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="lifetime">'c</span> {
<span class="ident">Unspecified</span>,
<span class="ident">Read</span>,
<span class="ident">Write</span>,
<span class="ident">Map</span>,
<span class="ident">Copy</span> { <span class="ident">dst_buffer</span>: <span class="kw-2">&</span><span class="lifetime">'c</span> <span class="ident">MemCore</span>, <span class="ident">dst_offset</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>, <span class="ident">len</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> },
<span class="ident">Fill</span> { <span class="ident">pattern</span>: <span class="ident">T</span>, <span class="ident">len</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> },
<span class="ident">CopyToImage</span> { <span class="ident">image</span>: <span class="kw-2">&</span><span class="lifetime">'c</span> <span class="ident">MemCore</span>, <span class="ident">dst_origin</span>: [<span class="ident">usize</span>; <span class="number">3</span>], <span class="ident">region</span>: [<span class="ident">usize</span>; <span class="number">3</span>] },
<span class="ident">GLAcquire</span>,
<span class="ident">GLRelease</span>,
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">BufferCmdKind</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">is_unspec</span>(<span class="kw-2">&</span><span class="lifetime">'c</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">BufferCmdKind</span>::<span class="ident">Unspecified</span> <span class="op">=</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="bool-val">true</span>
} <span class="kw">else</span> {
<span class="bool-val">false</span>
}
}
}
<span class="doccomment">/// The 'shape' of the data to be processed, whether one or multi-dimensional.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Should really be called dimensionality or something.</span>
<span class="doccomment">///</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">BufferCmdDataShape</span> {
<span class="ident">Lin</span> { <span class="ident">offset</span>: <span class="ident">usize</span> },
<span class="ident">Rect</span> {
<span class="ident">src_origin</span>: [<span class="ident">usize</span>; <span class="number">3</span>],
<span class="ident">dst_origin</span>: [<span class="ident">usize</span>; <span class="number">3</span>],
<span class="ident">region</span>: [<span class="ident">usize</span>; <span class="number">3</span>],
<span class="ident">src_row_pitch_bytes</span>: <span class="ident">usize</span>,
<span class="ident">src_slc_pitch_bytes</span>: <span class="ident">usize</span>,
<span class="ident">dst_row_pitch_bytes</span>: <span class="ident">usize</span>,
<span class="ident">dst_slc_pitch_bytes</span>: <span class="ident">usize</span>,
},
}
<span class="doccomment">/// A buffer command builder used to enqueue reads, writes, fills, and copies.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Create one by using `Buffer::cmd` or with shortcut methods such as</span>
<span class="doccomment">/// `Buffer::read` and `Buffer::write`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ## Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust,ignore</span>
<span class="doccomment">/// // Copies one buffer to another:</span>
<span class="doccomment">/// src_buffer.copy(&dst_buffer, 0, dst_buffer.len()).enq().unwrap();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Writes from a vector to an buffer, waiting on an event:</span>
<span class="doccomment">/// buffer.write(&src_vec).ewait(&event).enq().unwrap();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Reads from a buffer into a vector, waiting on an event list and</span>
<span class="doccomment">/// // filling a new empty event:</span>
<span class="doccomment">/// buffer.read(&dst_vec).ewait(&event_list).enew(&mut empty_event).enq().unwrap();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Reads without blocking:</span>
<span class="doccomment">/// buffer.read(&dst_vec).block(false).enew(&mut empty_event).enq().unwrap();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="attribute">#[<span class="ident">must_use</span> <span class="op">=</span> <span class="string">"commands do nothing unless enqueued"</span>]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="lifetime">'c</span> <span class="op">+</span> <span class="ident">OclPrm</span> {
<span class="ident">buffer</span>: <span class="kw-2">&</span><span class="lifetime">'c</span> <span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
<span class="ident">queue</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'c</span> <span class="ident">Queue</span><span class="op">></span>,
<span class="ident">block</span>: <span class="ident">bool</span>,
<span class="ident">kind</span>: <span class="ident">BufferCmdKind</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span>,
<span class="ident">shape</span>: <span class="ident">BufferCmdDataShape</span>,
<span class="ident">ewait</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">ClWaitListPtrEnum</span><span class="op"><</span><span class="lifetime">'c</span><span class="op">>></span>,
<span class="ident">enew</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">ClNullEventPtrEnum</span><span class="op"><</span><span class="lifetime">'c</span><span class="op">>></span>,
<span class="ident">mem_len</span>: <span class="ident">usize</span>,
}
<span class="doccomment">/// [UNSTABLE]: All methods still in a state of flux.</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="lifetime">'c</span> <span class="op">+</span> <span class="ident">OclPrm</span> {
<span class="doccomment">/// Returns a new buffer command builder associated with with the</span>
<span class="doccomment">/// memory object `obj_core` along with a default `queue` and `mem_len`</span>
<span class="doccomment">/// (the length of the device side buffer).</span>
<span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">buffer</span>: <span class="kw-2">&</span><span class="lifetime">'c</span> <span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>, <span class="ident">queue</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'c</span> <span class="ident">Queue</span><span class="op">></span>, <span class="comment">/*obj_core: &'c MemCore,*/</span> <span class="ident">mem_len</span>: <span class="ident">usize</span>)
<span class="op">-></span> <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">BufferCmd</span> {
<span class="ident">buffer</span>,
<span class="ident">queue</span>,
<span class="ident">block</span>: <span class="bool-val">true</span>,
<span class="ident">kind</span>: <span class="ident">BufferCmdKind</span>::<span class="ident">Unspecified</span>,
<span class="ident">shape</span>: <span class="ident">BufferCmdDataShape</span>::<span class="ident">Lin</span> { <span class="ident">offset</span>: <span class="number">0</span> },
<span class="ident">ewait</span>: <span class="prelude-val">None</span>,
<span class="ident">enew</span>: <span class="prelude-val">None</span>,
<span class="ident">mem_len</span>,
}
}
<span class="doccomment">/// Specifies that this command will be a read operation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// After calling this method, the blocking state of this command will</span>
<span class="doccomment">/// be unchanged.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ### Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The command operation kind must not have already been specified.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ### More Information</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [SDK][read_buffer] docs for more details.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [read_buffer]: https://www.khronos.org/registry/OpenCL/sdk/1.2/docs/man/xhtml/clEnqueueReadBuffer.html</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">read</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">R</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">dst_data</span>: <span class="ident">R</span>) <span class="op">-></span> <span class="ident">BufferReadCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">R</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">ReadDst</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">>></span> {
<span class="macro">assert</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">kind</span>.<span class="ident">is_unspec</span>(), <span class="string">"ocl::BufferCmd::read(): Operation kind \
already set for this command."</span>);
<span class="self">self</span>.<span class="ident">kind</span> <span class="op">=</span> <span class="ident">BufferCmdKind</span>::<span class="ident">Read</span>;
<span class="kw">let</span> <span class="ident">dst</span> <span class="op">=</span> <span class="ident">dst_data</span>.<span class="ident">into</span>();
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">dst</span>.<span class="ident">len</span>();
<span class="ident">BufferReadCmd</span> { <span class="ident">cmd</span>: <span class="self">self</span>, <span class="ident">dst</span>: <span class="ident">dst</span>, <span class="ident">range</span>: <span class="number">0</span>..<span class="ident">len</span> }
}
<span class="doccomment">/// Specifies that this command will be a write operation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ### Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The command operation kind must not have already been specified</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ### More Information</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [SDK][write_buffer] docs for more details.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [write_buffer]: https://www.khronos.org/registry/OpenCL/sdk/1.2/docs/man/xhtml/clEnqueueWriteBuffer.html</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">write</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">W</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">src_data</span>: <span class="ident">W</span>) <span class="op">-></span> <span class="ident">BufferWriteCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">W</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">WriteSrc</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">>></span> {
<span class="macro">assert</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">kind</span>.<span class="ident">is_unspec</span>(), <span class="string">"ocl::BufferCmd::write(): Operation kind \
already set for this command."</span>);
<span class="self">self</span>.<span class="ident">kind</span> <span class="op">=</span> <span class="ident">BufferCmdKind</span>::<span class="ident">Write</span>;
<span class="kw">let</span> <span class="ident">src</span> <span class="op">=</span> <span class="ident">src_data</span>.<span class="ident">into</span>();
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">src</span>.<span class="ident">len</span>();
<span class="ident">BufferWriteCmd</span> { <span class="ident">cmd</span>: <span class="self">self</span>, <span class="ident">src</span>: <span class="ident">src</span>, <span class="ident">range</span>: <span class="number">0</span>..<span class="ident">len</span> }
}
<span class="doccomment">/// Specifies that this command will be a map operation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Enqueuing a map command will map a region of a buffer into the host</span>
<span class="doccomment">/// address space and return a [`MemMap`] or [`FutureMemMap`], allowing</span>
<span class="doccomment">/// access to this mapped region. Accessing memory via a [`MemMap`] is</span>
<span class="doccomment">/// exactly like using a [slice].</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If `.block(..)` has been set it will be ignored. Non-blocking map</span>
<span class="doccomment">/// commands are enqueued using `::enq_async`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ## Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The command operation kind must not have already been specified</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ### More Information</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [SDK][map_buffer] docs for more details.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [map_buffer]: https://www.khronos.org/registry/OpenCL/sdk/1.2/docs/man/xhtml/clEnqueueMapBuffer.html</span>
<span class="doccomment">/// [`MemMap`]: struct.MemMap.html</span>
<span class="doccomment">/// [`FutureMemMap`]: async/struct.FutureMemMap.html</span>
<span class="doccomment">/// [slice]: https://doc.rust-lang.org/std/primitive.slice.html</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">map</span>(<span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">BufferMapCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="macro">assert</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">kind</span>.<span class="ident">is_unspec</span>(), <span class="string">"ocl::BufferCmd::write(): Operation kind \
already set for this command."</span>);
<span class="self">self</span>.<span class="ident">kind</span> <span class="op">=</span> <span class="ident">BufferCmdKind</span>::<span class="ident">Map</span>;
<span class="ident">BufferMapCmd</span> { <span class="ident">cmd</span>: <span class="self">self</span>, <span class="ident">flags</span>: <span class="prelude-val">None</span>, <span class="ident">len</span>: <span class="prelude-val">None</span> }
}
<span class="doccomment">/// Specifies that this command will be a copy operation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If `.block(..)` has been set it will be ignored.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// `dst_offset` defaults to `0`, `len` defaults to the full length of the</span>
<span class="doccomment">/// source buffer.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ## Errors</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If this is a rectangular copy, `dst_offset` and `len` must be None.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ## Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The command operation kind must not have already been specified</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ### More Information</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [SDK][copy_buffer] docs for more details.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [copy_buffer]: https://www.khronos.org/registry/OpenCL/sdk/1.2/docs/man/xhtml/clEnqueueCopyBuffer.html</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">copy</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">M</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">dst_buffer</span>: <span class="kw-2">&</span><span class="lifetime">'d</span> <span class="ident">M</span>, <span class="ident">dst_offset</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>, <span class="ident">len</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>)
<span class="op">-></span> <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="lifetime">'d</span>: <span class="lifetime">'c</span>, <span class="ident">M</span>: <span class="ident">AsMem</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="macro">assert</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">kind</span>.<span class="ident">is_unspec</span>(), <span class="string">"ocl::BufferCmd::copy(): Operation kind \
already set for this command."</span>);
<span class="self">self</span>.<span class="ident">kind</span> <span class="op">=</span> <span class="ident">BufferCmdKind</span>::<span class="ident">Copy</span> {
<span class="ident">dst_buffer</span>: <span class="ident">dst_buffer</span>.<span class="ident">as_mem</span>(),
<span class="ident">dst_offset</span>: <span class="ident">dst_offset</span>,
<span class="ident">len</span>: <span class="ident">len</span>,
};
<span class="self">self</span>
}
<span class="doccomment">/// Specifies that this command will be a copy to image operation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If `.block(..)` has been set it will be ignored.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ## Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The command operation kind must not have already been specified</span>
<span class="doccomment">///</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">copy_to_image</span><span class="op"><</span><span class="lifetime">'d</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">image</span>: <span class="kw-2">&</span><span class="lifetime">'d</span> <span class="ident">MemCore</span>, <span class="ident">dst_origin</span>: [<span class="ident">usize</span>; <span class="number">3</span>],
<span class="ident">region</span>: [<span class="ident">usize</span>; <span class="number">3</span>]) <span class="op">-></span> <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="lifetime">'d</span>: <span class="lifetime">'c</span> {
<span class="macro">assert</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">kind</span>.<span class="ident">is_unspec</span>(), <span class="string">"ocl::BufferCmd::copy_to_image(): Operation kind \
already set for this command."</span>);
<span class="self">self</span>.<span class="ident">kind</span> <span class="op">=</span> <span class="ident">BufferCmdKind</span>::<span class="ident">CopyToImage</span> { <span class="ident">image</span>: <span class="ident">image</span>, <span class="ident">dst_origin</span>: <span class="ident">dst_origin</span>, <span class="ident">region</span>: <span class="ident">region</span> };
<span class="self">self</span>
}
<span class="doccomment">/// Specifies that this command will acquire a GL buffer.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If `.block(..)` has been set it will be ignored.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ## Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The command operation kind must not have already been specified</span>
<span class="doccomment">///</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">gl_acquire</span>(<span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="macro">assert</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">kind</span>.<span class="ident">is_unspec</span>(), <span class="string">"ocl::BufferCmd::gl_acquire(): Operation kind \
already set for this command."</span>);
<span class="self">self</span>.<span class="ident">kind</span> <span class="op">=</span> <span class="ident">BufferCmdKind</span>::<span class="ident">GLAcquire</span>;
<span class="self">self</span>
}
<span class="doccomment">/// Specifies that this command will release a GL buffer.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If `.block(..)` has been set it will be ignored.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ## Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The command operation kind must not have already been specified</span>
<span class="doccomment">///</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">gl_release</span>(<span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="macro">assert</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">kind</span>.<span class="ident">is_unspec</span>(), <span class="string">"ocl::BufferCmd::gl_release(): Operation kind \
already set for this command."</span>);
<span class="self">self</span>.<span class="ident">kind</span> <span class="op">=</span> <span class="ident">BufferCmdKind</span>::<span class="ident">GLRelease</span>;
<span class="self">self</span>
}
<span class="doccomment">/// Specifies that this command will be a fill operation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If `.block(..)` has been set it will be ignored.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// `pattern` is the vector or scalar value to repeat contiguously. `len`</span>
<span class="doccomment">/// is the overall size expressed in units of sizeof(T) If `len` is `None`,</span>
<span class="doccomment">/// the pattern will fill the entire buffer, otherwise, `len` must be</span>
<span class="doccomment">/// divisible by sizeof(`pattern`).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// As an example if you want to fill the first 100 `cl_float4` sized</span>
<span class="doccomment">/// elements of a buffer, `pattern` would be a `cl_float4` and `len` would</span>
<span class="doccomment">/// be 400.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ## Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The command operation kind must not have already been specified</span>
<span class="doccomment">///</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">fill</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">pattern</span>: <span class="ident">T</span>, <span class="ident">len</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) <span class="op">-></span> <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="macro">assert</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">kind</span>.<span class="ident">is_unspec</span>(), <span class="string">"ocl::BufferCmd::fill(): Operation kind \
already set for this command."</span>);
<span class="self">self</span>.<span class="ident">kind</span> <span class="op">=</span> <span class="ident">BufferCmdKind</span>::<span class="ident">Fill</span> { <span class="ident">pattern</span>: <span class="ident">pattern</span>, <span class="ident">len</span>: <span class="ident">len</span> };
<span class="self">self</span>
}
<span class="doccomment">/// Specifies a queue to use for this call only.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Overrides the buffer's default queue if one is set. If no default</span>
<span class="doccomment">/// queue is set, this method **must** be called before enqueuing the</span>
<span class="doccomment">/// command.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">queue</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">queue</span>: <span class="kw-2">&</span><span class="lifetime">'c</span> <span class="ident">Queue</span>) <span class="op">-></span> <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">queue</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">queue</span>);
<span class="self">self</span>
}
<span class="doccomment">/// Specifies whether or not to block the current thread until completion.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Ignored if this is not a read or write operation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Default is `block = true`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ## Safety</span>
<span class="doccomment">///</span>
<span class="doccomment">/// When performing non-blocking reads or writes, the caller must ensure</span>
<span class="doccomment">/// that the data being read from or written to is not accessed improperly</span>
<span class="doccomment">/// until the command completes. Use events (`Event::wait_for`) or the</span>
<span class="doccomment">/// command queue (`Queue::finish`) to synchronize.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If possible, prefer instead to use [`::map`] with [`::enq_async`] for</span>
<span class="doccomment">/// optimal performance and data integrity.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`::map`]: builders/struct.BufferMapCmd.html</span>
<span class="doccomment">/// [`::enq_async`]: builders/struct.BufferMapCmd.html#method.enq_async</span>
<span class="comment">//</span>
<span class="comment">// [FIXME]: Check/fix links.</span>
<span class="comment">//</span>
<span class="comment">// * TODO: Should this error when calling non-rw `::enq`?</span>
<span class="comment">//</span>
<span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">block</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">block</span>: <span class="ident">bool</span>) <span class="op">-></span> <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">block</span> <span class="op">=</span> <span class="ident">block</span>;
<span class="self">self</span>
}
<span class="doccomment">/// Sets the linear offset for an operation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ## Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The 'shape' may not have already been set to rectangular by the</span>
<span class="doccomment">/// `::rect` function.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">offset</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">offset</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">BufferCmdDataShape</span>::<span class="ident">Rect</span> { .. } <span class="op">=</span> <span class="self">self</span>.<span class="ident">shape</span> {
<span class="macro">panic</span><span class="macro">!</span>(<span class="string">"ocl::BufferCmd::offset(): This command builder has already been set to \
rectangular mode with '::rect`. You cannot call both '::offset' and '::rect'."</span>);
}
<span class="self">self</span>.<span class="ident">shape</span> <span class="op">=</span> <span class="ident">BufferCmdDataShape</span>::<span class="ident">Lin</span> { <span class="ident">offset</span>: <span class="ident">offset</span> };
<span class="self">self</span>
}
<span class="doccomment">/// Specifies that this will be a rectangularly shaped operation</span>
<span class="doccomment">/// (the default being linear).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Row and slice pitches must all be expressed in bytes.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Only valid for 'read', 'write', and 'copy' modes. Will error if used</span>
<span class="doccomment">/// with any other mode.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">rect</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">src_origin</span>: [<span class="ident">usize</span>; <span class="number">3</span>], <span class="ident">dst_origin</span>: [<span class="ident">usize</span>; <span class="number">3</span>], <span class="ident">region</span>: [<span class="ident">usize</span>; <span class="number">3</span>],
<span class="ident">src_row_pitch_bytes</span>: <span class="ident">usize</span>, <span class="ident">src_slc_pitch_bytes</span>: <span class="ident">usize</span>, <span class="ident">dst_row_pitch_bytes</span>: <span class="ident">usize</span>,
<span class="ident">dst_slc_pitch_bytes</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">BufferCmdDataShape</span>::<span class="ident">Lin</span> { <span class="ident">offset</span> } <span class="op">=</span> <span class="self">self</span>.<span class="ident">shape</span> {
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">offset</span> <span class="op">==</span> <span class="number">0</span>, <span class="string">"ocl::BufferCmd::rect(): This command builder has already been \
set to linear mode with '::offset`. You cannot call both '::offset' and '::rect'."</span>);
}
<span class="self">self</span>.<span class="ident">shape</span> <span class="op">=</span> <span class="ident">BufferCmdDataShape</span>::<span class="ident">Rect</span> { <span class="ident">src_origin</span>: <span class="ident">src_origin</span>, <span class="ident">dst_origin</span>: <span class="ident">dst_origin</span>,
<span class="ident">region</span>: <span class="ident">region</span>, <span class="ident">src_row_pitch_bytes</span>: <span class="ident">src_row_pitch_bytes</span>,
<span class="ident">src_slc_pitch_bytes</span>: <span class="ident">src_slc_pitch_bytes</span>, <span class="ident">dst_row_pitch_bytes</span>: <span class="ident">dst_row_pitch_bytes</span>,
<span class="ident">dst_slc_pitch_bytes</span>: <span class="ident">dst_slc_pitch_bytes</span> };
<span class="self">self</span>
}
<span class="doccomment">/// Specifies an event or list of events to wait on before the command</span>
<span class="doccomment">/// will run.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// When events generated using the `::enew` method of **other**,</span>
<span class="doccomment">/// previously enqueued commands are passed here (either individually or</span>
<span class="doccomment">/// as part of an [`EventList`]), this command will not execute until</span>
<span class="doccomment">/// those commands have completed.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Using events can compliment the use of queues to order commands by</span>
<span class="doccomment">/// creating temporal dependencies between them (where commands in one</span>
<span class="doccomment">/// queue must wait for the completion of commands in another). Events can</span>
<span class="doccomment">/// also supplant queues altogether when, for example, using out-of-order</span>
<span class="doccomment">/// queues.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Example</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust,ignore</span>
<span class="doccomment">/// // Create an event list:</span>
<span class="doccomment">/// let mut event_list = EventList::new();</span>
<span class="doccomment">/// // Enqueue a kernel on `queue_1`, creating an event representing the kernel</span>
<span class="doccomment">/// // command in our list:</span>
<span class="doccomment">/// kernel.cmd().queue(&queue_1).enew(&mut event_list).enq()?;</span>
<span class="doccomment">/// // Read from a buffer using `queue_2`, ensuring the read does not begin until</span>
<span class="doccomment">/// // after the kernel command has completed:</span>
<span class="doccomment">/// buffer.read(rwvec.clone()).queue(&queue_2).ewait(&event_list).enq_async()?;</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`EventList`]: struct.EventList.html</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">ewait</span><span class="op"><</span><span class="lifetime">'e</span>, <span class="ident">Ewl</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">ewait</span>: <span class="ident">Ewl</span>) <span class="op">-></span> <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="lifetime">'e</span>: <span class="lifetime">'c</span>, <span class="ident">Ewl</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">ClWaitListPtrEnum</span><span class="op"><</span><span class="lifetime">'e</span><span class="op">>></span> {
<span class="self">self</span>.<span class="ident">ewait</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">ewait</span>.<span class="ident">into</span>());
<span class="self">self</span>
}
<span class="doccomment">/// Specifies the destination to store a new, optionally created event</span>
<span class="doccomment">/// associated with this command.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The destination can be a mutable reference to an empty event (created</span>
<span class="doccomment">/// using [`Event::empty`]) or a mutable reference to an event list.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// After this command is enqueued, the event in the destination can be</span>
<span class="doccomment">/// passed to the `::ewait` method of another command. Doing so will cause</span>
<span class="doccomment">/// the other command to wait until this command has completed before</span>
<span class="doccomment">/// executing.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Using events can compliment the use of queues to order commands by</span>
<span class="doccomment">/// creating temporal dependencies between them (where commands in one</span>
<span class="doccomment">/// queue must wait for the completion of commands in another). Events can</span>
<span class="doccomment">/// also supplant queues altogether when, for example, using out-of-order</span>
<span class="doccomment">/// queues.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Example</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust,ignore</span>
<span class="doccomment">/// // Create an event list:</span>
<span class="doccomment">/// let mut event = Event::empty();</span>
<span class="doccomment">/// // Enqueue a kernel on `queue_1`, creating an event representing the kernel</span>
<span class="doccomment">/// // command in our list:</span>
<span class="doccomment">/// kernel.cmd().queue(&queue_1).enew(&mut event).enq()?;</span>
<span class="doccomment">/// // Read from a buffer using `queue_2`, ensuring the read does not begin until</span>
<span class="doccomment">/// // after the kernel command has completed:</span>
<span class="doccomment">/// buffer.read(rwvec.clone()).queue(&queue_2).ewait(&event).enq_async()?;</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`Event::empty`]: struct.Event.html#method.empty</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">enew</span><span class="op"><</span><span class="lifetime">'e</span>, <span class="ident">En</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">enew</span>: <span class="ident">En</span>) <span class="op">-></span> <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="lifetime">'e</span>: <span class="lifetime">'c</span>, <span class="ident">En</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">ClNullEventPtrEnum</span><span class="op"><</span><span class="lifetime">'e</span><span class="op">>></span> {
<span class="self">self</span>.<span class="ident">enew</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">enew</span>.<span class="ident">into</span>());
<span class="self">self</span>
}
<span class="doccomment">/// Enqueues this command.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">enq</span>(<span class="self">self</span>) <span class="op">-></span> <span class="ident">OclResult</span><span class="op"><</span>()<span class="op">></span> {
<span class="kw">let</span> <span class="ident">queue</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">queue</span> {
<span class="prelude-val">Some</span>(<span class="ident">q</span>) <span class="op">=></span> <span class="ident">q</span>,
<span class="prelude-val">None</span> <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="string">"BufferCmd::enq: No queue set."</span>.<span class="ident">into</span>()),
};
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">kind</span> {
<span class="ident">BufferCmdKind</span>::<span class="ident">Copy</span> { <span class="ident">dst_buffer</span>, <span class="ident">dst_offset</span>, <span class="ident">len</span> } <span class="op">=></span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">shape</span> {
<span class="ident">BufferCmdDataShape</span>::<span class="ident">Lin</span> { <span class="ident">offset</span> } <span class="op">=></span> {
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">len</span>.<span class="ident">unwrap_or</span>(<span class="self">self</span>.<span class="ident">mem_len</span>);
<span class="ident">check_len</span>(<span class="self">self</span>.<span class="ident">mem_len</span>, <span class="ident">len</span>, <span class="ident">offset</span>)<span class="question-mark">?</span>;
<span class="kw">let</span> <span class="ident">dst_offset</span> <span class="op">=</span> <span class="ident">dst_offset</span>.<span class="ident">unwrap_or</span>(<span class="number">0</span>);
<span class="ident">core</span>::<span class="ident">enqueue_copy_buffer</span>::<span class="op"><</span><span class="ident">T</span>, _, _, _<span class="op">></span>(<span class="ident">queue</span>,
<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">obj_core</span>, <span class="ident">dst_buffer</span>, <span class="ident">offset</span>, <span class="ident">dst_offset</span>, <span class="ident">len</span>,
<span class="self">self</span>.<span class="ident">ewait</span>, <span class="self">self</span>.<span class="ident">enew</span>).<span class="ident">map_err</span>(<span class="ident">OclError</span>::<span class="ident">from</span>)
},
<span class="ident">BufferCmdDataShape</span>::<span class="ident">Rect</span> { <span class="ident">src_origin</span>, <span class="ident">dst_origin</span>, <span class="ident">region</span>,
<span class="ident">src_row_pitch_bytes</span>, <span class="ident">src_slc_pitch_bytes</span>, <span class="ident">dst_row_pitch_bytes</span>,
<span class="ident">dst_slc_pitch_bytes</span> } <span class="op">=></span>
{
<span class="kw">if</span> <span class="ident">dst_offset</span>.<span class="ident">is_some</span>() <span class="op">||</span> <span class="ident">len</span>.<span class="ident">is_some</span>() { <span class="kw">return</span> <span class="prelude-val">Err</span>(
<span class="string">"ocl::BufferCmd::enq(): For 'rect' shaped copies, destination \
offset and length must be 'None'. Ex.: \
'cmd().copy(&{{buf_name}}, None, None)..'."</span>.<span class="ident">into</span>());
}
<span class="ident">core</span>::<span class="ident">enqueue_copy_buffer_rect</span>::<span class="op"><</span><span class="ident">T</span>, _, _, _<span class="op">></span>(<span class="ident">queue</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">obj_core</span>,
<span class="ident">dst_buffer</span>, <span class="ident">src_origin</span>, <span class="ident">dst_origin</span>, <span class="ident">region</span>, <span class="ident">src_row_pitch_bytes</span>,
<span class="ident">src_slc_pitch_bytes</span>, <span class="ident">dst_row_pitch_bytes</span>, <span class="ident">dst_slc_pitch_bytes</span>,
<span class="self">self</span>.<span class="ident">ewait</span>, <span class="self">self</span>.<span class="ident">enew</span>).<span class="ident">map_err</span>(<span class="ident">OclError</span>::<span class="ident">from</span>)
},
}
},
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span><span class="op">=</span><span class="string">"opencl_vendor_mesa"</span>))]</span>
<span class="ident">BufferCmdKind</span>::<span class="ident">Fill</span> { <span class="ident">pattern</span>, <span class="ident">len</span> } <span class="op">=></span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">shape</span> {
<span class="ident">BufferCmdDataShape</span>::<span class="ident">Lin</span> { <span class="ident">offset</span> } <span class="op">=></span> {
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">len</span> {
<span class="prelude-val">Some</span>(<span class="ident">l</span>) <span class="op">=></span> <span class="ident">l</span>,
<span class="prelude-val">None</span> <span class="op">=></span> <span class="self">self</span>.<span class="ident">mem_len</span>,
};
<span class="ident">check_len</span>(<span class="self">self</span>.<span class="ident">mem_len</span>, <span class="ident">len</span>, <span class="ident">offset</span>)<span class="question-mark">?</span>;
<span class="ident">core</span>::<span class="ident">enqueue_fill_buffer</span>(<span class="ident">queue</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">obj_core</span>, <span class="ident">pattern</span>,
<span class="ident">offset</span>, <span class="ident">len</span>, <span class="self">self</span>.<span class="ident">ewait</span>, <span class="self">self</span>.<span class="ident">enew</span>, <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="ident">queue</span>.<span class="ident">device_version</span>()))
.<span class="ident">map_err</span>(<span class="ident">OclError</span>::<span class="ident">from</span>)
},
<span class="ident">BufferCmdDataShape</span>::<span class="ident">Rect</span> { .. } <span class="op">=></span> <span class="prelude-val">Err</span>(
<span class="string">"ocl::BufferCmd::enq(): Rectangular fill is not a valid operation. \
Please use the default shape, linear."</span>.<span class="ident">into</span>())
}
},
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span><span class="op">=</span><span class="string">"opencl_vendor_mesa"</span>))]</span>
<span class="ident">BufferCmdKind</span>::<span class="ident">GLAcquire</span> <span class="op">=></span> {
<span class="kw">let</span> <span class="ident">buf_slc</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">std</span>::<span class="ident">slice</span>::<span class="ident">from_raw_parts</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">obj_core</span>, <span class="number">1</span>) };
<span class="ident">core</span>::<span class="ident">enqueue_acquire_gl_objects</span>(<span class="ident">queue</span>, <span class="ident">buf_slc</span>, <span class="self">self</span>.<span class="ident">ewait</span>, <span class="self">self</span>.<span class="ident">enew</span>).<span class="ident">map_err</span>(<span class="ident">OclError</span>::<span class="ident">from</span>)
},
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span><span class="op">=</span><span class="string">"opencl_vendor_mesa"</span>))]</span>
<span class="ident">BufferCmdKind</span>::<span class="ident">GLRelease</span> <span class="op">=></span> {
<span class="kw">let</span> <span class="ident">buf_slc</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">std</span>::<span class="ident">slice</span>::<span class="ident">from_raw_parts</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">buffer</span>.<span class="ident">obj_core</span>, <span class="number">1</span>) };
<span class="ident">core</span>::<span class="ident">enqueue_release_gl_objects</span>(<span class="ident">queue</span>, <span class="ident">buf_slc</span>, <span class="self">self</span>.<span class="ident">ewait</span>, <span class="self">self</span>.<span class="ident">enew</span>).<span class="ident">map_err</span>(<span class="ident">OclError</span>::<span class="ident">from</span>)
},
<span class="ident">BufferCmdKind</span>::<span class="ident">Unspecified</span> <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="string">"ocl::BufferCmd::enq(): \
No operation specified. Use '.read(...)', 'write(...)', etc. before calling \
'.enq()'."</span>.<span class="ident">into</span>()),
<span class="ident">BufferCmdKind</span>::<span class="ident">Map</span> { .. } <span class="op">=></span> <span class="macro">unreachable</span><span class="macro">!</span>(),
_ <span class="op">=></span> <span class="macro">unimplemented</span><span class="macro">!</span>(),
}
}
}
<span class="doccomment">/// The data destination for a buffer read command.</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">ReadDst</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="lifetime">'d</span> {
<span class="ident">Slice</span>(<span class="kw-2">&</span><span class="lifetime">'d</span> <span class="kw-2">mut</span> [<span class="ident">T</span>]),
<span class="ident">RwVec</span>(<span class="ident">RwVec</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>),
<span class="ident">Writer</span>(<span class="ident">FutureWriteGuard</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span>),
<span class="prelude-val">None</span>,
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">ReadDst</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">take</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">ReadDst</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
::<span class="ident">std</span>::<span class="ident">mem</span>::<span class="ident">replace</span>(<span class="self">self</span>, <span class="ident">ReadDst</span>::<span class="prelude-val">None</span>)
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">ReadDst</span>::<span class="ident">RwVec</span>(<span class="kw-2">ref</span> <span class="ident">rw_vec</span>) <span class="op">=></span> <span class="ident">rw_vec</span>.<span class="ident">len_stale</span>(),
<span class="ident">ReadDst</span>::<span class="ident">Writer</span>(<span class="kw-2">ref</span> <span class="ident">writer</span>) <span class="op">=></span> <span class="kw">unsafe</span> { (<span class="kw-2">*</span><span class="ident">writer</span>.<span class="ident">as_ptr</span>()).<span class="ident">len</span>() },
<span class="ident">ReadDst</span>::<span class="ident">Slice</span>(<span class="kw-2">ref</span> <span class="ident">slice</span>) <span class="op">=></span> <span class="ident">slice</span>.<span class="ident">len</span>(),
<span class="ident">ReadDst</span>::<span class="prelude-val">None</span> <span class="op">=></span> <span class="number">0</span>,
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">From</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'d</span> <span class="kw-2">mut</span> [<span class="ident">T</span>]<span class="op">></span> <span class="kw">for</span> <span class="ident">ReadDst</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">slice</span>: <span class="kw-2">&</span><span class="lifetime">'d</span> <span class="kw-2">mut</span> [<span class="ident">T</span>]) <span class="op">-></span> <span class="ident">ReadDst</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">ReadDst</span>::<span class="ident">Slice</span>(<span class="ident">slice</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">From</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'d</span> <span class="kw-2">mut</span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span> <span class="kw">for</span> <span class="ident">ReadDst</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">vec</span>: <span class="kw-2">&</span><span class="lifetime">'d</span> <span class="kw-2">mut</span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) <span class="op">-></span> <span class="ident">ReadDst</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">ReadDst</span>::<span class="ident">Slice</span>(<span class="ident">vec</span>.<span class="ident">as_mut_slice</span>())
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">From</span><span class="op"><</span><span class="ident">RwVec</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span> <span class="kw">for</span> <span class="ident">ReadDst</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">rw_vec</span>: <span class="ident">RwVec</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) <span class="op">-></span> <span class="ident">ReadDst</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">ReadDst</span>::<span class="ident">RwVec</span>(<span class="ident">rw_vec</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">From</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">RwVec</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span> <span class="kw">for</span> <span class="ident">ReadDst</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">rw_vec</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">RwVec</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) <span class="op">-></span> <span class="ident">ReadDst</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">ReadDst</span>::<span class="ident">RwVec</span>(<span class="ident">rw_vec</span>.<span class="ident">clone</span>())
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">From</span><span class="op"><</span><span class="ident">FutureWriteGuard</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span><span class="op">></span> <span class="kw">for</span> <span class="ident">ReadDst</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">writer</span>: <span class="ident">FutureWriteGuard</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span>) <span class="op">-></span> <span class="ident">ReadDst</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">ReadDst</span>::<span class="ident">Writer</span>(<span class="ident">writer</span>)
}
}
<span class="doccomment">/// A buffer command builder used to enqueue reads.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [SDK][read_buffer] docs for more details.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [read_buffer]: https://www.khronos.org/registry/OpenCL/sdk/1.2/docs/man/xhtml/clEnqueueReadBuffer.html</span>
<span class="attribute">#[<span class="ident">must_use</span> <span class="op">=</span> <span class="string">"commands do nothing unless enqueued"</span>]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">BufferReadCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="lifetime">'c</span> <span class="op">+</span> <span class="lifetime">'d</span> <span class="op">+</span> <span class="ident">OclPrm</span> {
<span class="ident">cmd</span>: <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span>,
<span class="ident">dst</span>: <span class="ident">ReadDst</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span>,
<span class="ident">range</span>: <span class="ident">Range</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>,
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">BufferReadCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {
<span class="doccomment">/// Specifies a queue to use for this call only.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Overrides the buffer's default queue if one is set. If no default</span>
<span class="doccomment">/// queue is set, this method **must** be called before enqueuing the</span>
<span class="doccomment">/// command.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">queue</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">queue</span>: <span class="kw-2">&</span><span class="lifetime">'c</span> <span class="ident">Queue</span>) <span class="op">-></span> <span class="ident">BufferReadCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">queue</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">queue</span>);
<span class="self">self</span>
}
<span class="doccomment">/// Specifies whether or not to block the current thread until completion.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Ignored if this is not a read or write operation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Default is `block = true`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ## Safety</span>
<span class="doccomment">///</span>
<span class="doccomment">/// When performing non-blocking reads or writes, the caller must ensure</span>
<span class="doccomment">/// that the data being read from or written to is not accessed improperly</span>
<span class="doccomment">/// until the command completes. Use events (`Event::wait_for`) or the</span>
<span class="doccomment">/// command queue (`Queue::finish`) to synchronize.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If possible, prefer instead to use [`::map`] with [`::enq_async`] for</span>
<span class="doccomment">/// optimal performance and data integrity.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`::map`]: builders/struct.BufferMapCmd.html</span>
<span class="doccomment">/// [`::enq_async`]: builders/struct.BufferMapCmd.html</span>
<span class="comment">//</span>
<span class="comment">// [FIXME]: Check/fix links.</span>
<span class="comment">//</span>
<span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">block</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">block</span>: <span class="ident">bool</span>) <span class="op">-></span> <span class="ident">BufferReadCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">block</span> <span class="op">=</span> <span class="ident">block</span>;
<span class="self">self</span>
}
<span class="doccomment">/// Sets the linear offset for an operation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ## Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The 'shape' may not have already been set to rectangular by the</span>
<span class="doccomment">/// `::rect` function.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">offset</span>(<span class="self">self</span>, <span class="ident">offset</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">BufferReadCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">BufferReadCmd</span> { <span class="ident">cmd</span>: <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">offset</span>(<span class="ident">offset</span>), ..<span class="self">self</span> }
}
<span class="doccomment">/// Sets an offset into the destination data.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Equivalent to setting the start position of a slice into the</span>
<span class="doccomment">/// destination data (e.g. `dst_data[dst_offset..]`). Use `::len` to set</span>
<span class="doccomment">/// the end position (resulting in `dst_data[dst_offset..len]`).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Defaults to 0 if not set. Panics if `::rect` has been called.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">dst_offset</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">dst_offset</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">BufferReadCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">BufferCmdDataShape</span>::<span class="ident">Rect</span> { .. } <span class="op">=</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">shape</span> {
<span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Cannot set a destination offset for a rectangular read."</span>);
}
<span class="self">self</span>.<span class="ident">range</span>.<span class="ident">end</span> <span class="op">=</span> <span class="ident">dst_offset</span> <span class="op">+</span> <span class="self">self</span>.<span class="ident">range</span>.<span class="ident">len</span>();
<span class="self">self</span>.<span class="ident">range</span>.<span class="ident">start</span> <span class="op">=</span> <span class="ident">dst_offset</span>;
<span class="self">self</span>
}
<span class="doccomment">/// Sets the total length of data to read.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Equivalent to setting the end position of a slice into the destination</span>
<span class="doccomment">/// data (e.g. `destination[..len]`). Use `::dst_offset` to set the start</span>
<span class="doccomment">/// position (resulting in `dst_data[dst_offset..len]`).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Defaults to the total length of the read destination provided. Panics</span>
<span class="doccomment">/// if `::rect` has been called.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">len</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">BufferReadCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">BufferCmdDataShape</span>::<span class="ident">Rect</span> { .. } <span class="op">=</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">shape</span> {
<span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Cannot set a length for a rectangular read."</span>);
}
<span class="self">self</span>.<span class="ident">range</span>.<span class="ident">end</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">range</span>.<span class="ident">start</span> <span class="op">+</span> <span class="ident">len</span>;
<span class="self">self</span>
}
<span class="doccomment">/// Specifies that this will be a rectangularly shaped operation</span>
<span class="doccomment">/// (the default being linear).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Row and slice pitches must all be expressed in bytes.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Panics if `:offset`, `dst_offset`, or `::len` have been called.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">rect</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">src_origin</span>: [<span class="ident">usize</span>; <span class="number">3</span>], <span class="ident">dst_origin</span>: [<span class="ident">usize</span>; <span class="number">3</span>], <span class="ident">region</span>: [<span class="ident">usize</span>; <span class="number">3</span>],
<span class="ident">src_row_pitch_bytes</span>: <span class="ident">usize</span>, <span class="ident">src_slc_pitch_bytes</span>: <span class="ident">usize</span>, <span class="ident">dst_row_pitch_bytes</span>: <span class="ident">usize</span>,
<span class="ident">dst_slc_pitch_bytes</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">BufferReadCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">BufferCmdDataShape</span>::<span class="ident">Lin</span> { <span class="ident">offset</span> } <span class="op">=</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">shape</span> {
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">offset</span> <span class="op">==</span> <span class="number">0</span>, <span class="string">"ocl::BufferCmd::rect(): This command builder has already been \
set to linear mode with '::offset`. You cannot call both '::offset' and '::rect'."</span>);
}
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">range</span>.<span class="ident">len</span>() <span class="op">!=</span> <span class="self">self</span>.<span class="ident">dst</span>.<span class="ident">len</span>() {
<span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Buffer read: Cannot call '::rect' after calling '::src_offset' or '::len'."</span>);
}
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">shape</span> <span class="op">=</span> <span class="ident">BufferCmdDataShape</span>::<span class="ident">Rect</span> { <span class="ident">src_origin</span>: <span class="ident">src_origin</span>, <span class="ident">dst_origin</span>: <span class="ident">dst_origin</span>,
<span class="ident">region</span>: <span class="ident">region</span>, <span class="ident">src_row_pitch_bytes</span>: <span class="ident">src_row_pitch_bytes</span>,
<span class="ident">src_slc_pitch_bytes</span>: <span class="ident">src_slc_pitch_bytes</span>, <span class="ident">dst_row_pitch_bytes</span>: <span class="ident">dst_row_pitch_bytes</span>,
<span class="ident">dst_slc_pitch_bytes</span>: <span class="ident">dst_slc_pitch_bytes</span> };
<span class="self">self</span>
}
<span class="doccomment">/// Specifies an event or list of events to wait on before the command</span>
<span class="doccomment">/// will run.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// When events generated using the `::enew` method of **other**,</span>
<span class="doccomment">/// previously enqueued commands are passed here (either individually or</span>
<span class="doccomment">/// as part of an [`EventList`]), this command will not execute until</span>
<span class="doccomment">/// those commands have completed.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Using events can compliment the use of queues to order commands by</span>
<span class="doccomment">/// creating temporal dependencies between them (where commands in one</span>
<span class="doccomment">/// queue must wait for the completion of commands in another). Events can</span>
<span class="doccomment">/// also supplant queues altogether when, for example, using out-of-order</span>
<span class="doccomment">/// queues.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Example</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust,ignore</span>
<span class="doccomment">/// // Create an event list:</span>
<span class="doccomment">/// let mut event_list = EventList::new();</span>
<span class="doccomment">/// // Enqueue a kernel on `queue_1`, creating an event representing the kernel</span>
<span class="doccomment">/// // command in our list:</span>
<span class="doccomment">/// kernel.cmd().queue(&queue_1).enew(&mut event_list).enq()?;</span>
<span class="doccomment">/// // Read from a buffer using `queue_2`, ensuring the read does not begin until</span>
<span class="doccomment">/// // after the kernel command has completed:</span>
<span class="doccomment">/// buffer.read(rwvec.clone()).queue(&queue_2).ewait(&event_list).enq_async()?;</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`EventList`]: struct.EventList.html</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">ewait</span><span class="op"><</span><span class="lifetime">'e</span>, <span class="ident">Ewl</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">ewait</span>: <span class="ident">Ewl</span>) <span class="op">-></span> <span class="ident">BufferReadCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="lifetime">'e</span>: <span class="lifetime">'c</span>, <span class="ident">Ewl</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">ClWaitListPtrEnum</span><span class="op"><</span><span class="lifetime">'e</span><span class="op">>></span> {
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">ewait</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">ewait</span>.<span class="ident">into</span>());
<span class="self">self</span>
}
<span class="doccomment">/// Specifies the destination to store a new, optionally created event</span>
<span class="doccomment">/// associated with this command.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The destination can be a mutable reference to an empty event (created</span>
<span class="doccomment">/// using [`Event::empty`]) or a mutable reference to an event list.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// After this command is enqueued, the event in the destination can be</span>
<span class="doccomment">/// passed to the `::ewait` method of another command. Doing so will cause</span>
<span class="doccomment">/// the other command to wait until this command has completed before</span>
<span class="doccomment">/// executing.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Using events can compliment the use of queues to order commands by</span>
<span class="doccomment">/// creating temporal dependencies between them (where commands in one</span>
<span class="doccomment">/// queue must wait for the completion of commands in another). Events can</span>
<span class="doccomment">/// also supplant queues altogether when, for example, using out-of-order</span>
<span class="doccomment">/// queues.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Example</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust,ignore</span>
<span class="doccomment">/// // Create an event list:</span>
<span class="doccomment">/// let mut event = Event::empty();</span>
<span class="doccomment">/// // Enqueue a kernel on `queue_1`, creating an event representing the kernel</span>
<span class="doccomment">/// // command in our list:</span>
<span class="doccomment">/// kernel.cmd().queue(&queue_1).enew(&mut event).enq()?;</span>
<span class="doccomment">/// // Read from a buffer using `queue_2`, ensuring the read does not begin until</span>
<span class="doccomment">/// // after the kernel command has completed:</span>
<span class="doccomment">/// buffer.read(rwvec.clone()).queue(&queue_2).ewait(&event).enq_async()?;</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`Event::empty`]: struct.Event.html#method.empty</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">enew</span><span class="op"><</span><span class="lifetime">'e</span>, <span class="ident">En</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">enew</span>: <span class="ident">En</span>) <span class="op">-></span> <span class="ident">BufferReadCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="lifetime">'e</span>: <span class="lifetime">'c</span>, <span class="ident">En</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">ClNullEventPtrEnum</span><span class="op"><</span><span class="lifetime">'e</span><span class="op">>></span> {
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">enew</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">enew</span>.<span class="ident">into</span>());
<span class="self">self</span>
}
<span class="doccomment">/// Enqueues this command, blocking the current thread until it is complete.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If an `RwVec` is being used as the data destination, the current</span>
<span class="doccomment">/// thread will be blocked until an exclusive lock can be obtained before</span>
<span class="doccomment">/// running the command (which will also block for its duration).</span>
<span class="comment">//</span>
<span class="comment">// NOTE: Could use deferred initialization for the guard slice instead of closure.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">enq</span>(<span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">OclResult</span><span class="op"><</span>()<span class="op">></span> {
<span class="kw">let</span> <span class="ident">read_dst</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">dst</span>.<span class="ident">take</span>();
<span class="kw">let</span> <span class="ident">range</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">range</span>.<span class="ident">clone</span>();
<span class="kw">if</span> <span class="ident">range</span>.<span class="ident">end</span> <span class="op">></span> <span class="ident">read_dst</span>.<span class="ident">len</span>() { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">OclError</span>::<span class="ident">from</span>(
<span class="string">"Unable to enqueue buffer read command: Invalid src_offset and/or len."</span>)) }
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">enqueue_with_data</span> <span class="op">=</span> <span class="op">|</span><span class="ident">dst</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="ident">T</span>]<span class="op">|</span> {
<span class="kw">let</span> <span class="ident">queue</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">queue</span> {
<span class="prelude-val">Some</span>(<span class="ident">q</span>) <span class="op">=></span> <span class="ident">q</span>,
<span class="prelude-val">None</span> <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="string">"BufferReadCmd::enq: No queue set."</span>.<span class="ident">into</span>()),
};
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">kind</span> {
<span class="ident">BufferCmdKind</span>::<span class="ident">Read</span> <span class="op">=></span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">shape</span> {
<span class="ident">BufferCmdDataShape</span>::<span class="ident">Lin</span> { <span class="ident">offset</span> } <span class="op">=></span> {
<span class="ident">check_len</span>(<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">mem_len</span>, <span class="ident">dst</span>.<span class="ident">len</span>(), <span class="ident">offset</span>)<span class="question-mark">?</span>;
<span class="kw">unsafe</span> {
<span class="ident">core</span>::<span class="ident">enqueue_read_buffer</span>(<span class="ident">queue</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">buffer</span>.<span class="ident">obj_core</span>,
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">block</span>, <span class="ident">offset</span>, <span class="ident">dst</span>, <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">ewait</span>.<span class="ident">take</span>(),
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">enew</span>.<span class="ident">take</span>()).<span class="ident">map_err</span>(<span class="ident">OclError</span>::<span class="ident">from</span>)
}
},
<span class="ident">BufferCmdDataShape</span>::<span class="ident">Rect</span> { <span class="ident">src_origin</span>, <span class="ident">dst_origin</span>, <span class="ident">region</span>, <span class="ident">src_row_pitch_bytes</span>,
<span class="ident">src_slc_pitch_bytes</span>, <span class="ident">dst_row_pitch_bytes</span>, <span class="ident">dst_slc_pitch_bytes</span> } <span class="op">=></span>
{
<span class="comment">// TODO: Verify dims given (like `::check_len`).</span>
<span class="kw">unsafe</span> {
<span class="ident">core</span>::<span class="ident">enqueue_read_buffer_rect</span>(<span class="ident">queue</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">buffer</span>.<span class="ident">obj_core</span>,
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">block</span>, <span class="ident">src_origin</span>, <span class="ident">dst_origin</span>, <span class="ident">region</span>,
<span class="ident">src_row_pitch_bytes</span>, <span class="ident">src_slc_pitch_bytes</span>, <span class="ident">dst_row_pitch_bytes</span>,
<span class="ident">dst_slc_pitch_bytes</span>, <span class="ident">dst</span>, <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">ewait</span>.<span class="ident">take</span>(),
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">enew</span>.<span class="ident">take</span>()).<span class="ident">map_err</span>(<span class="ident">OclError</span>::<span class="ident">from</span>)
}
}
}
},
_ <span class="op">=></span> <span class="macro">unreachable</span><span class="macro">!</span>(),
}
};
<span class="kw">match</span> <span class="ident">read_dst</span> {
<span class="ident">ReadDst</span>::<span class="ident">Slice</span>(<span class="ident">slice</span>) <span class="op">=></span> {
<span class="ident">enqueue_with_data</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">slice</span>[<span class="ident">range</span>])
},
<span class="ident">ReadDst</span>::<span class="ident">RwVec</span>(<span class="ident">rw_vec</span>) <span class="op">=></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">guard</span> <span class="op">=</span> <span class="ident">rw_vec</span>.<span class="ident">write</span>().<span class="ident">wait</span>()
.<span class="ident">map_err</span>(<span class="op">|</span>_<span class="op">|</span> <span class="ident">OclError</span>::<span class="ident">from</span>(<span class="string">"Unable to obtain lock."</span>))<span class="question-mark">?</span>;
<span class="ident">enqueue_with_data</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">guard</span>.<span class="ident">as_mut_slice</span>()[<span class="ident">range</span>])
},
<span class="ident">ReadDst</span>::<span class="ident">Writer</span>(<span class="ident">writer</span>) <span class="op">=></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">guard</span> <span class="op">=</span> <span class="ident">writer</span>.<span class="ident">wait</span>()
.<span class="ident">map_err</span>(<span class="op">|</span>_<span class="op">|</span> <span class="ident">OclError</span>::<span class="ident">from</span>(<span class="string">"Unable to obtain lock."</span>))<span class="question-mark">?</span>;
<span class="ident">enqueue_with_data</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">guard</span>.<span class="ident">as_mut_slice</span>()[<span class="ident">range</span>])
}
<span class="ident">ReadDst</span>::<span class="prelude-val">None</span> <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Invalid read destination."</span>),
}
}
<span class="doccomment">/// Enqueues this command and returns a future representing its completion</span>
<span class="doccomment">/// which resolves to a guard providing exclusive data access usable</span>
<span class="doccomment">/// within subsequent futures.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// A data destination container appropriate for an asynchronous operation</span>
<span class="doccomment">/// (such as `RwVec`) must have been passed to `::read`.</span>
<span class="doccomment">///</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">enq_async</span>(<span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">OclResult</span><span class="op"><</span><span class="ident">FutureWriteGuard</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span><span class="op">></span> {
<span class="kw">let</span> <span class="ident">queue</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">queue</span> {
<span class="prelude-val">Some</span>(<span class="ident">q</span>) <span class="op">=></span> <span class="ident">q</span>,
<span class="prelude-val">None</span> <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="string">"BufferCmd::enq: No queue set."</span>.<span class="ident">into</span>()),
};
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">kind</span> {
<span class="ident">BufferCmdKind</span>::<span class="ident">Read</span> <span class="op">=></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">writer</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">dst</span> {
<span class="ident">ReadDst</span>::<span class="ident">RwVec</span>(<span class="ident">rw_vec</span>) <span class="op">=></span> <span class="ident">rw_vec</span>.<span class="ident">write</span>(),
<span class="ident">ReadDst</span>::<span class="ident">Writer</span>(<span class="ident">writer</span>) <span class="op">=></span> <span class="ident">writer</span>,
_ <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="string">"BufferReadCmd::enq_async: Invalid data destination kind for an
asynchronous enqueue. The read destination must be a 'RwVec'."</span>.<span class="ident">into</span>()),
};
<span class="kw">let</span> <span class="ident">writer_len</span> <span class="op">=</span> <span class="kw">unsafe</span> { (<span class="kw-2">*</span><span class="ident">writer</span>.<span class="ident">as_ptr</span>()).<span class="ident">len</span>() };
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">range</span>.<span class="ident">end</span> <span class="op">></span> <span class="ident">writer_len</span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">OclError</span>::<span class="ident">from</span>(<span class="string">"Unable to enqueue buffer read command: \
Invalid src_offset and/or len."</span>))
}
<span class="ident">writer</span>.<span class="ident">create_lock_event</span>(<span class="ident">queue</span>.<span class="ident">context_ptr</span>()<span class="question-mark">?</span>)<span class="question-mark">?</span>;
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">wl</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">ewait</span> {
<span class="ident">writer</span>.<span class="ident">set_lock_wait_events</span>(<span class="ident">wl</span>);
}
<span class="comment">// let dst = unsafe { &mut writer.as_mut_slice().expect("BufferReadCmd::enq_async: \</span>
<span class="comment">// Invalid writer.")[self.range] };</span>
<span class="kw">let</span> <span class="ident">dst</span> <span class="op">=</span> <span class="kw">unsafe</span> {
<span class="kw-2">&</span><span class="kw-2">mut</span> ::<span class="ident">std</span>::<span class="ident">slice</span>::<span class="ident">from_raw_parts_mut</span>(
(<span class="kw-2">*</span><span class="ident">writer</span>.<span class="ident">as_mut_ptr</span>()).<span class="ident">as_mut_ptr</span>(), <span class="ident">writer_len</span>)[<span class="self">self</span>.<span class="ident">range</span>]
};
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">read_event</span> <span class="op">=</span> <span class="ident">Event</span>::<span class="ident">empty</span>();
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">shape</span> {
<span class="ident">BufferCmdDataShape</span>::<span class="ident">Lin</span> { <span class="ident">offset</span> } <span class="op">=></span> {
<span class="ident">check_len</span>(<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">mem_len</span>, <span class="ident">dst</span>.<span class="ident">len</span>(), <span class="ident">offset</span>)<span class="question-mark">?</span>;
<span class="kw">unsafe</span> { <span class="ident">core</span>::<span class="ident">enqueue_read_buffer</span>(<span class="ident">queue</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">buffer</span>.<span class="ident">obj_core</span>, <span class="bool-val">false</span>,
<span class="ident">offset</span>, <span class="ident">dst</span>, <span class="ident">writer</span>.<span class="ident">lock_event</span>(), <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">read_event</span>))<span class="question-mark">?</span>; }
},
<span class="ident">BufferCmdDataShape</span>::<span class="ident">Rect</span> { <span class="ident">src_origin</span>, <span class="ident">dst_origin</span>, <span class="ident">region</span>,
<span class="ident">src_row_pitch_bytes</span>, <span class="ident">src_slc_pitch_bytes</span>,
<span class="ident">dst_row_pitch_bytes</span>, <span class="ident">dst_slc_pitch_bytes</span> } <span class="op">=></span>
{
<span class="kw">unsafe</span> { <span class="ident">core</span>::<span class="ident">enqueue_read_buffer_rect</span>(<span class="ident">queue</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">buffer</span>.<span class="ident">obj_core</span>,
<span class="bool-val">false</span>, <span class="ident">src_origin</span>, <span class="ident">dst_origin</span>, <span class="ident">region</span>, <span class="ident">src_row_pitch_bytes</span>,
<span class="ident">src_slc_pitch_bytes</span>, <span class="ident">dst_row_pitch_bytes</span>, <span class="ident">dst_slc_pitch_bytes</span>,
<span class="ident">dst</span>, <span class="ident">writer</span>.<span class="ident">lock_event</span>(), <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">read_event</span>))<span class="question-mark">?</span>; }
}
}
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">enew</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">enew</span>.<span class="ident">take</span>() {
<span class="kw">unsafe</span> { <span class="ident">enew</span>.<span class="ident">clone_from</span>(<span class="kw-2">&</span><span class="ident">read_event</span>) }
}
<span class="ident">writer</span>.<span class="ident">set_command_wait_event</span>(<span class="ident">read_event</span>);
<span class="prelude-val">Ok</span>(<span class="ident">writer</span>)
},
_ <span class="op">=></span> <span class="macro">unreachable</span><span class="macro">!</span>(),
}
}
}
<span class="doccomment">/// The data destination for a buffer read command.</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">WriteSrc</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="lifetime">'d</span> {
<span class="ident">Slice</span>(<span class="kw-2">&</span><span class="lifetime">'d</span> [<span class="ident">T</span>]),
<span class="ident">RwVec</span>(<span class="ident">RwVec</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>),
<span class="ident">Reader</span>(<span class="ident">FutureReadGuard</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span>),
<span class="prelude-val">None</span>,
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">WriteSrc</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">take</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">WriteSrc</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
::<span class="ident">std</span>::<span class="ident">mem</span>::<span class="ident">replace</span>(<span class="self">self</span>, <span class="ident">WriteSrc</span>::<span class="prelude-val">None</span>)
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">WriteSrc</span>::<span class="ident">RwVec</span>(<span class="kw-2">ref</span> <span class="ident">rw_vec</span>) <span class="op">=></span> <span class="ident">rw_vec</span>.<span class="ident">len_stale</span>(),
<span class="ident">WriteSrc</span>::<span class="ident">Reader</span>(<span class="kw-2">ref</span> <span class="ident">writer</span>) <span class="op">=></span> <span class="kw">unsafe</span> { (<span class="kw-2">*</span><span class="ident">writer</span>.<span class="ident">as_ptr</span>()).<span class="ident">len</span>() },
<span class="ident">WriteSrc</span>::<span class="ident">Slice</span>(<span class="ident">slice</span>) <span class="op">=></span> <span class="ident">slice</span>.<span class="ident">len</span>(),
<span class="ident">WriteSrc</span>::<span class="prelude-val">None</span> <span class="op">=></span> <span class="number">0</span>,
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">From</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'d</span> [<span class="ident">T</span>]<span class="op">></span> <span class="kw">for</span> <span class="ident">WriteSrc</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">slice</span>: <span class="kw-2">&</span><span class="lifetime">'d</span> [<span class="ident">T</span>]) <span class="op">-></span> <span class="ident">WriteSrc</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">WriteSrc</span>::<span class="ident">Slice</span>(<span class="ident">slice</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">From</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'d</span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span> <span class="kw">for</span> <span class="ident">WriteSrc</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">vec</span>: <span class="kw-2">&</span><span class="lifetime">'d</span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) <span class="op">-></span> <span class="ident">WriteSrc</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">WriteSrc</span>::<span class="ident">Slice</span>(<span class="ident">vec</span>.<span class="ident">as_slice</span>())
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">From</span><span class="op"><</span><span class="ident">RwVec</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span> <span class="kw">for</span> <span class="ident">WriteSrc</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">rw_vec</span>: <span class="ident">RwVec</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) <span class="op">-></span> <span class="ident">WriteSrc</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">WriteSrc</span>::<span class="ident">RwVec</span>(<span class="ident">rw_vec</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">From</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">RwVec</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span> <span class="kw">for</span> <span class="ident">WriteSrc</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">rw_vec</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">RwVec</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) <span class="op">-></span> <span class="ident">WriteSrc</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">WriteSrc</span>::<span class="ident">RwVec</span>(<span class="ident">rw_vec</span>.<span class="ident">clone</span>())
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">From</span><span class="op"><</span><span class="ident">FutureReadGuard</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span><span class="op">></span> <span class="kw">for</span> <span class="ident">WriteSrc</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">reader</span>: <span class="ident">FutureReadGuard</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span>) <span class="op">-></span> <span class="ident">WriteSrc</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">WriteSrc</span>::<span class="ident">Reader</span>(<span class="ident">reader</span>)
}
}
<span class="doccomment">/// A buffer command builder used to enqueue writes.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [SDK][write_buffer] docs for more details.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [write_buffer]: https://www.khronos.org/registry/OpenCL/sdk/1.2/docs/man/xhtml/clEnqueueWriteBuffer.html</span>
<span class="attribute">#[<span class="ident">must_use</span> <span class="op">=</span> <span class="string">"commands do nothing unless enqueued"</span>]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">BufferWriteCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="lifetime">'c</span> <span class="op">+</span> <span class="lifetime">'d</span> <span class="op">+</span> <span class="ident">OclPrm</span> {
<span class="ident">cmd</span>: <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span>,
<span class="ident">src</span>: <span class="ident">WriteSrc</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span>,
<span class="ident">range</span>: <span class="ident">Range</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>,
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">BufferWriteCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {
<span class="doccomment">/// Specifies a queue to use for this call only.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Overrides the buffer's default queue if one is set. If no default</span>
<span class="doccomment">/// queue is set, this method **must** be called before enqueuing the</span>
<span class="doccomment">/// command.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">queue</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">queue</span>: <span class="kw-2">&</span><span class="lifetime">'c</span> <span class="ident">Queue</span>) <span class="op">-></span> <span class="ident">BufferWriteCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">queue</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">queue</span>);
<span class="self">self</span>
}
<span class="doccomment">/// Specifies whether or not to block the current thread until completion.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Ignored if this is not a read or write operation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Default is `block = true`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ## Safety</span>
<span class="doccomment">///</span>
<span class="doccomment">/// When performing non-blocking reads or writes, the caller must ensure</span>
<span class="doccomment">/// that the data being read from or written to is not accessed improperly</span>
<span class="doccomment">/// until the command completes. Use events (`Event::wait_for`) or the</span>
<span class="doccomment">/// command queue (`Queue::finish`) to synchronize.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If possible, prefer instead to use [`::map`] with [`::enq_async`] for</span>
<span class="doccomment">/// optimal performance and data integrity.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`::map`]: builders/struct.BufferMapCmd.html</span>
<span class="doccomment">/// [`::enq_async`]: builders/struct.BufferMapCmd.html</span>
<span class="comment">//</span>
<span class="comment">// [FIXME]: Check/fix links.</span>
<span class="comment">//</span>
<span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">block</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">block</span>: <span class="ident">bool</span>) <span class="op">-></span> <span class="ident">BufferWriteCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">block</span> <span class="op">=</span> <span class="ident">block</span>;
<span class="self">self</span>
}
<span class="doccomment">/// Sets the linear offset for an operation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ## Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The 'shape' may not have already been set to rectangular by the</span>
<span class="doccomment">/// `::rect` function.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">offset</span>(<span class="self">self</span>, <span class="ident">offset</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">BufferWriteCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">BufferWriteCmd</span> { <span class="ident">cmd</span>: <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">offset</span>(<span class="ident">offset</span>), ..<span class="self">self</span> }
}
<span class="doccomment">/// Sets an offset into the source data.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Equivalent to setting the start position of a slice into the source</span>
<span class="doccomment">/// data (e.g. `src_data[src_offset..]`). Use `::len` to set the end</span>
<span class="doccomment">/// position (resulting in `src_data[dst_offset..len]`).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Defaults to 0 if not set. Panics if `::rect` has been called.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">src_offset</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">src_offset</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">BufferWriteCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">BufferCmdDataShape</span>::<span class="ident">Rect</span> { .. } <span class="op">=</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">shape</span> {
<span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Cannot set a source offset for a rectangular write."</span>);
}
<span class="self">self</span>.<span class="ident">range</span>.<span class="ident">end</span> <span class="op">=</span> <span class="ident">src_offset</span> <span class="op">+</span> <span class="self">self</span>.<span class="ident">range</span>.<span class="ident">len</span>();
<span class="self">self</span>.<span class="ident">range</span>.<span class="ident">start</span> <span class="op">=</span> <span class="ident">src_offset</span>;
<span class="self">self</span>
}
<span class="doccomment">/// Sets the total length of data to write.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Equivalent to setting the end position of a slice into the source</span>
<span class="doccomment">/// data (e.g. `src_data[..len]`). Use `::src_offset` to set the</span>
<span class="doccomment">/// start position (resulting in `src_data[src_offset..len]`).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Defaults to the length of the write source provided. Panics if</span>
<span class="doccomment">/// `::rect` has been called.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">len</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">BufferWriteCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">BufferCmdDataShape</span>::<span class="ident">Rect</span> { .. } <span class="op">=</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">shape</span> {
<span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Cannot set a length for a rectangular write."</span>);
}
<span class="self">self</span>.<span class="ident">range</span>.<span class="ident">end</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">range</span>.<span class="ident">start</span> <span class="op">+</span> <span class="ident">len</span>;
<span class="self">self</span>
}
<span class="doccomment">/// Specifies that this will be a rectangularly shaped operation</span>
<span class="doccomment">/// (the default being linear).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Row and slice pitches must all be expressed in bytes.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Panics if `:offset`, `src_offset`, or `::len` have been called.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">rect</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">src_origin</span>: [<span class="ident">usize</span>; <span class="number">3</span>], <span class="ident">dst_origin</span>: [<span class="ident">usize</span>; <span class="number">3</span>], <span class="ident">region</span>: [<span class="ident">usize</span>; <span class="number">3</span>],
<span class="ident">src_row_pitch_bytes</span>: <span class="ident">usize</span>, <span class="ident">src_slc_pitch_bytes</span>: <span class="ident">usize</span>, <span class="ident">dst_row_pitch_bytes</span>: <span class="ident">usize</span>,
<span class="ident">dst_slc_pitch_bytes</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">BufferWriteCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">BufferCmdDataShape</span>::<span class="ident">Lin</span> { <span class="ident">offset</span> } <span class="op">=</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">shape</span> {
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">offset</span> <span class="op">==</span> <span class="number">0</span>, <span class="string">"ocl::BufferCmd::rect(): This command builder has already been \
set to linear mode with '::offset`. You cannot call both '::offset' and '::rect'."</span>);
}
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">range</span>.<span class="ident">len</span>() <span class="op">!=</span> <span class="self">self</span>.<span class="ident">src</span>.<span class="ident">len</span>() {
<span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Buffer write: Cannot call '::rect' after calling '::src_offset' or '::len'."</span>);
}
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">shape</span> <span class="op">=</span> <span class="ident">BufferCmdDataShape</span>::<span class="ident">Rect</span> { <span class="ident">src_origin</span>: <span class="ident">src_origin</span>, <span class="ident">dst_origin</span>: <span class="ident">dst_origin</span>,
<span class="ident">region</span>: <span class="ident">region</span>, <span class="ident">src_row_pitch_bytes</span>: <span class="ident">src_row_pitch_bytes</span>,
<span class="ident">src_slc_pitch_bytes</span>: <span class="ident">src_slc_pitch_bytes</span>, <span class="ident">dst_row_pitch_bytes</span>: <span class="ident">dst_row_pitch_bytes</span>,
<span class="ident">dst_slc_pitch_bytes</span>: <span class="ident">dst_slc_pitch_bytes</span> };
<span class="self">self</span>
}
<span class="doccomment">/// Specifies an event or list of events to wait on before the command</span>
<span class="doccomment">/// will run.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// When events generated using the `::enew` method of **other**,</span>
<span class="doccomment">/// previously enqueued commands are passed here (either individually or</span>
<span class="doccomment">/// as part of an [`EventList`]), this command will not execute until</span>
<span class="doccomment">/// those commands have completed.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Using events can compliment the use of queues to order commands by</span>
<span class="doccomment">/// creating temporal dependencies between them (where commands in one</span>
<span class="doccomment">/// queue must wait for the completion of commands in another). Events can</span>
<span class="doccomment">/// also supplant queues altogether when, for example, using out-of-order</span>
<span class="doccomment">/// queues.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Example</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust,ignore</span>
<span class="doccomment">/// // Create an event list:</span>
<span class="doccomment">/// let mut event_list = EventList::new();</span>
<span class="doccomment">/// // Enqueue a kernel on `queue_1`, creating an event representing the kernel</span>
<span class="doccomment">/// // command in our list:</span>
<span class="doccomment">/// kernel.cmd().queue(&queue_1).enew(&mut event_list).enq()?;</span>
<span class="doccomment">/// // Write to a buffer using `queue_2`, ensuring the write does not begin until</span>
<span class="doccomment">/// // after the kernel command has completed:</span>
<span class="doccomment">/// buffer.write(rwvec.clone()).queue(&queue_2).ewait(&event_list).enq_async()?;</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`EventList`]: struct.EventList.html</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">ewait</span><span class="op"><</span><span class="lifetime">'e</span>, <span class="ident">Ewl</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">ewait</span>: <span class="ident">Ewl</span>) <span class="op">-></span> <span class="ident">BufferWriteCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="lifetime">'e</span>: <span class="lifetime">'c</span>, <span class="ident">Ewl</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">ClWaitListPtrEnum</span><span class="op"><</span><span class="lifetime">'e</span><span class="op">>></span> {
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">ewait</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">ewait</span>.<span class="ident">into</span>());
<span class="self">self</span>
}
<span class="doccomment">/// Specifies the destination to store a new, optionally created event</span>
<span class="doccomment">/// associated with this command.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The destination can be a mutable reference to an empty event (created</span>
<span class="doccomment">/// using [`Event::empty`]) or a mutable reference to an event list.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// After this command is enqueued, the event in the destination can be</span>
<span class="doccomment">/// passed to the `::ewait` method of another command. Doing so will cause</span>
<span class="doccomment">/// the other command to wait until this command has completed before</span>
<span class="doccomment">/// executing.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Using events can compliment the use of queues to order commands by</span>
<span class="doccomment">/// creating temporal dependencies between them (where commands in one</span>
<span class="doccomment">/// queue must wait for the completion of commands in another). Events can</span>
<span class="doccomment">/// also supplant queues altogether when, for example, using out-of-order</span>
<span class="doccomment">/// queues.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Example</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust,ignore</span>
<span class="doccomment">/// // Create an event list:</span>
<span class="doccomment">/// let mut event = Event::empty();</span>
<span class="doccomment">/// // Enqueue a kernel on `queue_1`, creating an event representing the kernel</span>
<span class="doccomment">/// // command in our list:</span>
<span class="doccomment">/// kernel.cmd().queue(&queue_1).enew(&mut event).enq()?;</span>
<span class="doccomment">/// // Write to a buffer using `queue_2`, ensuring the write does not begin until</span>
<span class="doccomment">/// // after the kernel command has completed:</span>
<span class="doccomment">/// buffer.write(rwvec.clone()).queue(&queue_2).ewait(&event).enq_async()?;</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`Event::empty`]: struct.Event.html#method.empty</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">enew</span><span class="op"><</span><span class="lifetime">'e</span>, <span class="ident">En</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">enew</span>: <span class="ident">En</span>) <span class="op">-></span> <span class="ident">BufferWriteCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="lifetime">'e</span>: <span class="lifetime">'c</span>, <span class="ident">En</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">ClNullEventPtrEnum</span><span class="op"><</span><span class="lifetime">'e</span><span class="op">>></span> {
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">enew</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">enew</span>.<span class="ident">into</span>());
<span class="self">self</span>
}
<span class="doccomment">/// Enqueues this command, blocking the current thread until it is complete.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If an `RwVec` is being used as the data destination, the current</span>
<span class="doccomment">/// thread will be blocked until an exclusive lock can be obtained before</span>
<span class="doccomment">/// running the command (which will also block).</span>
<span class="comment">//</span>
<span class="comment">// NOTE: Could use deferred initialization for the guard slice instead of closure.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">enq</span>(<span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">OclResult</span><span class="op"><</span>()<span class="op">></span> {
<span class="kw">let</span> <span class="ident">write_src</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">src</span>.<span class="ident">take</span>();
<span class="kw">let</span> <span class="ident">range</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">range</span>.<span class="ident">clone</span>();
<span class="kw">if</span> <span class="ident">range</span>.<span class="ident">end</span> <span class="op">></span> <span class="ident">write_src</span>.<span class="ident">len</span>() { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">OclError</span>::<span class="ident">from</span>(
<span class="string">"Unable to enqueue buffer write command: Invalid src_offset and/or len."</span>)) }
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">enqueue_with_data</span> <span class="op">=</span> <span class="op">|</span><span class="ident">src</span>: <span class="kw-2">&</span>[<span class="ident">T</span>]<span class="op">|</span> {
<span class="kw">let</span> <span class="ident">queue</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">queue</span> {
<span class="prelude-val">Some</span>(<span class="ident">q</span>) <span class="op">=></span> <span class="ident">q</span>,
<span class="prelude-val">None</span> <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="string">"BufferCmd::enq: No queue set."</span>.<span class="ident">into</span>()),
};
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">kind</span> {
<span class="ident">BufferCmdKind</span>::<span class="ident">Write</span> <span class="op">=></span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">shape</span> {
<span class="ident">BufferCmdDataShape</span>::<span class="ident">Lin</span> { <span class="ident">offset</span> } <span class="op">=></span> {
<span class="ident">check_len</span>(<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">mem_len</span>, <span class="ident">src</span>.<span class="ident">len</span>(), <span class="ident">offset</span>)<span class="question-mark">?</span>;
<span class="kw">unsafe</span> {
<span class="ident">core</span>::<span class="ident">enqueue_write_buffer</span>(<span class="ident">queue</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">buffer</span>.<span class="ident">obj_core</span>, <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">block</span>,
<span class="ident">offset</span>, <span class="ident">src</span>, <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">ewait</span>.<span class="ident">take</span>(), <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">enew</span>.<span class="ident">take</span>())
.<span class="ident">map_err</span>(<span class="ident">OclError</span>::<span class="ident">from</span>)
}
},
<span class="ident">BufferCmdDataShape</span>::<span class="ident">Rect</span> { <span class="ident">src_origin</span>, <span class="ident">dst_origin</span>, <span class="ident">region</span>,
<span class="ident">src_row_pitch_bytes</span>, <span class="ident">src_slc_pitch_bytes</span>, <span class="ident">dst_row_pitch_bytes</span>,
<span class="ident">dst_slc_pitch_bytes</span> } <span class="op">=></span>
{
<span class="kw">unsafe</span> {
<span class="ident">core</span>::<span class="ident">enqueue_write_buffer_rect</span>(<span class="ident">queue</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">buffer</span>.<span class="ident">obj_core</span>,
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">block</span>, <span class="ident">src_origin</span>, <span class="ident">dst_origin</span>, <span class="ident">region</span>, <span class="ident">src_row_pitch_bytes</span>,
<span class="ident">src_slc_pitch_bytes</span>, <span class="ident">dst_row_pitch_bytes</span>, <span class="ident">dst_slc_pitch_bytes</span>,
<span class="ident">src</span>, <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">ewait</span>.<span class="ident">take</span>(), <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">enew</span>.<span class="ident">take</span>())
.<span class="ident">map_err</span>(<span class="ident">OclError</span>::<span class="ident">from</span>)
}
}
}
},
_ <span class="op">=></span> <span class="macro">unreachable</span><span class="macro">!</span>(),
}
};
<span class="kw">match</span> <span class="ident">write_src</span> {
<span class="ident">WriteSrc</span>::<span class="ident">Slice</span>(<span class="ident">slice</span>) <span class="op">=></span> {
<span class="ident">enqueue_with_data</span>(<span class="kw-2">&</span><span class="ident">slice</span>[<span class="ident">range</span>])
},
<span class="ident">WriteSrc</span>::<span class="ident">RwVec</span>(<span class="ident">rw_vec</span>) <span class="op">=></span> {
<span class="kw">let</span> <span class="ident">guard</span> <span class="op">=</span> <span class="ident">rw_vec</span>.<span class="ident">read</span>().<span class="ident">wait</span>()
.<span class="ident">map_err</span>(<span class="op">|</span>_<span class="op">|</span> <span class="ident">OclError</span>::<span class="ident">from</span>(<span class="string">"Unable to obtain lock."</span>))<span class="question-mark">?</span>;
<span class="ident">enqueue_with_data</span>(<span class="kw-2">&</span><span class="ident">guard</span>.<span class="ident">as_slice</span>()[<span class="ident">range</span>])
},
<span class="ident">WriteSrc</span>::<span class="ident">Reader</span>(<span class="ident">reader</span>) <span class="op">=></span> {
<span class="kw">let</span> <span class="ident">guard</span> <span class="op">=</span> <span class="ident">reader</span>.<span class="ident">wait</span>()
.<span class="ident">map_err</span>(<span class="op">|</span>_<span class="op">|</span> <span class="ident">OclError</span>::<span class="ident">from</span>(<span class="string">"Unable to obtain lock."</span>))<span class="question-mark">?</span>;
<span class="ident">enqueue_with_data</span>(<span class="kw-2">&</span><span class="ident">guard</span>.<span class="ident">as_slice</span>()[<span class="ident">range</span>])
},
<span class="ident">WriteSrc</span>::<span class="prelude-val">None</span> <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Invalid read destination."</span>),
}
}
<span class="doccomment">/// Enqueues this command and returns a future representing its completion</span>
<span class="doccomment">/// which resolves to a read guard usable within subsequent futures.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// A data destination container appropriate for an asynchronous operation</span>
<span class="doccomment">/// (such as `RwVec`) must have been passed to `::write`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The returned future must be resolved.</span>
<span class="doccomment">///</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">enq_async</span>(<span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">OclResult</span><span class="op"><</span><span class="ident">FutureReadGuard</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span><span class="op">></span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">kind</span> {
<span class="ident">BufferCmdKind</span>::<span class="ident">Write</span> <span class="op">=></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">reader</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">src</span> {
<span class="ident">WriteSrc</span>::<span class="ident">RwVec</span>(<span class="ident">rw_vec</span>) <span class="op">=></span> <span class="ident">rw_vec</span>.<span class="ident">read</span>(),
<span class="ident">WriteSrc</span>::<span class="ident">Reader</span>(<span class="ident">reader</span>) <span class="op">=></span> <span class="ident">reader</span>,
_ <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="string">"BufferWriteCmd::enq_async: Invalid data destination kind for an
asynchronous enqueue. The read destination must be a 'RwVec'."</span>.<span class="ident">into</span>()),
};
<span class="kw">let</span> <span class="ident">reader_len</span> <span class="op">=</span> <span class="kw">unsafe</span> { (<span class="kw-2">*</span><span class="ident">reader</span>.<span class="ident">as_ptr</span>()).<span class="ident">len</span>() };
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">range</span>.<span class="ident">end</span> <span class="op">></span> <span class="ident">reader_len</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">OclError</span>::<span class="ident">from</span>(
<span class="string">"Unable to enqueue buffer write command: Invalid src_offset and/or len."</span>)) }
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">wl</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">ewait</span> {
<span class="ident">reader</span>.<span class="ident">set_lock_wait_events</span>(<span class="ident">wl</span>);
}
<span class="kw">let</span> <span class="ident">queue</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">queue</span> {
<span class="prelude-val">Some</span>(<span class="ident">q</span>) <span class="op">=></span> <span class="ident">q</span>,
<span class="prelude-val">None</span> <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="string">"BufferCmd::enq: No queue set."</span>.<span class="ident">into</span>()),
};
<span class="ident">reader</span>.<span class="ident">create_lock_event</span>(<span class="ident">queue</span>.<span class="ident">context_ptr</span>()<span class="question-mark">?</span>)<span class="question-mark">?</span>;
<span class="kw">let</span> <span class="ident">src</span> <span class="op">=</span> <span class="kw">unsafe</span> {
<span class="kw-2">&</span>::<span class="ident">std</span>::<span class="ident">slice</span>::<span class="ident">from_raw_parts</span>((<span class="kw-2">*</span><span class="ident">reader</span>.<span class="ident">as_ptr</span>()).<span class="ident">as_ptr</span>(), <span class="ident">reader_len</span>)[<span class="self">self</span>.<span class="ident">range</span>]
};
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">write_event</span> <span class="op">=</span> <span class="ident">Event</span>::<span class="ident">empty</span>();
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">shape</span> {
<span class="ident">BufferCmdDataShape</span>::<span class="ident">Lin</span> { <span class="ident">offset</span> } <span class="op">=></span> {
<span class="ident">check_len</span>(<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">mem_len</span>, <span class="ident">src</span>.<span class="ident">len</span>(), <span class="ident">offset</span>)<span class="question-mark">?</span>;
<span class="kw">unsafe</span> {
<span class="ident">core</span>::<span class="ident">enqueue_write_buffer</span>(<span class="ident">queue</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">buffer</span>.<span class="ident">obj_core</span>, <span class="bool-val">false</span>,
<span class="ident">offset</span>, <span class="ident">src</span>, <span class="ident">reader</span>.<span class="ident">lock_event</span>(), <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">write_event</span>))<span class="question-mark">?</span>;
}
},
<span class="ident">BufferCmdDataShape</span>::<span class="ident">Rect</span> { <span class="ident">src_origin</span>, <span class="ident">dst_origin</span>, <span class="ident">region</span>,
<span class="ident">src_row_pitch_bytes</span>, <span class="ident">src_slc_pitch_bytes</span>,
<span class="ident">dst_row_pitch_bytes</span>, <span class="ident">dst_slc_pitch_bytes</span> } <span class="op">=></span>
{
<span class="kw">unsafe</span> {
<span class="ident">core</span>::<span class="ident">enqueue_write_buffer_rect</span>(<span class="ident">queue</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">buffer</span>.<span class="ident">obj_core</span>,
<span class="bool-val">false</span>, <span class="ident">src_origin</span>, <span class="ident">dst_origin</span>, <span class="ident">region</span>, <span class="ident">src_row_pitch_bytes</span>,
<span class="ident">src_slc_pitch_bytes</span>, <span class="ident">dst_row_pitch_bytes</span>, <span class="ident">dst_slc_pitch_bytes</span>,
<span class="ident">src</span>, <span class="ident">reader</span>.<span class="ident">lock_event</span>(), <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">write_event</span>))<span class="question-mark">?</span>;
}
}
}
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">enew</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">enew</span>.<span class="ident">take</span>() {
<span class="kw">unsafe</span> { <span class="ident">enew</span>.<span class="ident">clone_from</span>(<span class="kw-2">&</span><span class="ident">write_event</span>) }
}
<span class="ident">reader</span>.<span class="ident">set_command_wait_event</span>(<span class="ident">write_event</span>);
<span class="prelude-val">Ok</span>(<span class="ident">reader</span>)
},
_ <span class="op">=></span> <span class="macro">unreachable</span><span class="macro">!</span>(),
}
}
<span class="doccomment">/// Enqueues this command and returns a future representing its</span>
<span class="doccomment">/// completion.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The returned future resolves to a write guard providing exclusive data</span>
<span class="doccomment">/// access available within subsequent futures. This is important when a</span>
<span class="doccomment">/// write must occur at the correct time in the global read/write order.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// A data destination container appropriate for an asynchronous operation</span>
<span class="doccomment">/// (such as `RwVec`) must have been passed to `::write`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The returned future must be resolved.</span>
<span class="doccomment">///</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">enq_async_then_write</span>(<span class="self">self</span>) <span class="op">-></span> <span class="ident">OclResult</span><span class="op"><</span><span class="ident">FutureWriteGuard</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span><span class="op">></span> {
<span class="comment">// NOTE: The precise point in time at which `::upgrade_after_command`</span>
<span class="comment">// is called does not matter since a read request will have already</span>
<span class="comment">// been enqueued in the RwVec's queue. The upgrade can be requested at</span>
<span class="comment">// any time before the read guard is destroyed and have the exact same</span>
<span class="comment">// effect. That read request will lock out any possibility of a write</span>
<span class="comment">// request interfering with the global r/w order.</span>
<span class="self">self</span>.<span class="ident">enq_async</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">read_guard</span><span class="op">|</span> <span class="ident">read_guard</span>.<span class="ident">upgrade_after_command</span>())
}
}
<span class="doccomment">/// A command builder used to enqueue a map command.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Enqueuing a map command will map a region of a buffer into the host</span>
<span class="doccomment">/// address space and return a [`MemMap`] or [`FutureMemMap`], allowing access</span>
<span class="doccomment">/// to this mapped region. Accessing memory via a [`MemMap`] is exactly like</span>
<span class="doccomment">/// using a [slice].</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [SDK][map_buffer] docs for more details.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [map_buffer]: https://www.khronos.org/registry/OpenCL/sdk/1.2/docs/man/xhtml/clEnqueueMapBuffer.html</span>
<span class="doccomment">/// [`MemMap`]: struct.MemMap.html</span>
<span class="doccomment">/// [`FutureMemMap`]: async/struct.FutureMemMap.html</span>
<span class="doccomment">/// [slice]: https://doc.rust-lang.org/std/primitive.slice.html</span>
<span class="attribute">#[<span class="ident">must_use</span> <span class="op">=</span> <span class="string">"commands do nothing unless enqueued"</span>]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">BufferMapCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="lifetime">'c</span> <span class="op">+</span> <span class="ident">OclPrm</span> {
<span class="ident">cmd</span>: <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span>,
<span class="ident">flags</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">MapFlags</span><span class="op">></span>,
<span class="ident">len</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> ,
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">BufferMapCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {
<span class="doccomment">/// Specifies the flags to be used for this map command.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Flags can also be specified using the `::read`, `::write`, and</span>
<span class="doccomment">/// `::write_invalidate` methods instead.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [SDK] docs for more details.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [SDK]: https://www.khronos.org/registry/OpenCL/sdk/1.2/docs/man/xhtml/clEnqueueMapBuffer.html</span>
<span class="comment">//</span>
<span class="comment">// * TODO: Add links to methods listed above.</span>
<span class="comment">// * TODO: Sort out the `BufferBuilder::host_slice`/`::flags` situation.</span>
<span class="comment">// Possibly create separate methods, `use_host_ptr` and</span>
<span class="comment">// `copy_host_slice`.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">flags</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">flags</span>: <span class="ident">MapFlags</span>) <span class="op">-></span> <span class="ident">BufferMapCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">flags</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">flags</span>);
<span class="self">self</span>
}
<span class="doccomment">/// Specifies that the memory object is being mapped for reading.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Sets the flag to be used for this map command to `[CL_]MAP_READ`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This is the fastest way to move data from device to host for many use</span>
<span class="doccomment">/// cases when used with buffers created with the `MEM_ALLOC_HOST_PTR` or</span>
<span class="doccomment">/// `MEM_USE_HOST_PTR` flags.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">read</span>(<span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">BufferMapCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">flags</span> <span class="op">=</span> <span class="prelude-val">Some</span>(::<span class="ident">flags</span>::<span class="ident">MAP_READ</span>);
<span class="self">self</span>
}
<span class="doccomment">/// Specifies that the memory object is being mapped for writing.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Sets the flag to be used for this map command to `[CL_]MAP_WRITE`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This is not the most efficient method of transferring data from host</span>
<span class="doccomment">/// to device due to the memory being synchronized beforehand. Prefer</span>
<span class="doccomment">/// `::write_invalidate` unless you need the memory region to be updated</span>
<span class="doccomment">/// (e.g. if you are only writing to particular portions of the data, and</span>
<span class="doccomment">/// will not be overwriting the entire contents, etc.). Use this with</span>
<span class="doccomment">/// buffers created with the `MEM_ALLOC_HOST_PTR` or `MEM_USE_HOST_PTR`</span>
<span class="doccomment">/// flags for best performance.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">write</span>(<span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">BufferMapCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">flags</span> <span class="op">=</span> <span class="prelude-val">Some</span>(::<span class="ident">flags</span>::<span class="ident">MAP_WRITE</span>);
<span class="self">self</span>
}
<span class="doccomment">/// Specifies that the memory object is being mapped for writing and that</span>
<span class="doccomment">/// the local (host) memory region may contain stale data that must be</span>
<span class="doccomment">/// completely overwritten before unmapping.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Sets the flag to be used for this map command to</span>
<span class="doccomment">/// `[CL_]MAP_WRITE_INVALIDATE_REGION`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This option may provide a substantial performance improvement when</span>
<span class="doccomment">/// writing and is the fastest method for moving data in bulk from host to</span>
<span class="doccomment">/// device memory when used with buffers created with the</span>
<span class="doccomment">/// `MEM_ALLOC_HOST_PTR` or `MEM_USE_HOST_PTR` flags. Only use this when</span>
<span class="doccomment">/// you will be overwriting the entire contents of the mapped region</span>
<span class="doccomment">/// otherwise you will send stale or junk data to the device.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">write_invalidate</span>(<span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">BufferMapCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">flags</span> <span class="op">=</span> <span class="prelude-val">Some</span>(::<span class="ident">flags</span>::<span class="ident">MAP_WRITE_INVALIDATE_REGION</span>);
<span class="self">self</span>
}
<span class="doccomment">/// Specifies the length of the region to map.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If unspecified the entire buffer will be mapped.</span>
<span class="comment">//</span>
<span class="comment">// * TODO: Consider taking an `Into<SpatialDims>` argument and possibly</span>
<span class="comment">// renaming method.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">len</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">BufferMapCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">len</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">len</span>);
<span class="self">self</span>
}
<span class="doccomment">/// Specifies a queue to use for this call only.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Overrides the buffer's default queue if one is set. If no default</span>
<span class="doccomment">/// queue is set, this method **must** be called before enqueuing the</span>
<span class="doccomment">/// command.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">queue</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">queue</span>: <span class="kw-2">&</span><span class="lifetime">'c</span> <span class="ident">Queue</span>) <span class="op">-></span> <span class="ident">BufferMapCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">queue</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">queue</span>);
<span class="self">self</span>
}
<span class="doccomment">/// Sets the linear offset for an operation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ## Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The 'shape' may not have already been set to rectangular by the</span>
<span class="doccomment">/// `::rect` function.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">offset</span>(<span class="self">self</span>, <span class="ident">offset</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">BufferMapCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">BufferMapCmd</span> { <span class="ident">cmd</span>: <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">offset</span>(<span class="ident">offset</span>), ..<span class="self">self</span> }
}
<span class="doccomment">/// Specifies an event or list of events to wait on before the command</span>
<span class="doccomment">/// will run.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// When events generated using the `::enew` method of **other**,</span>
<span class="doccomment">/// previously enqueued commands are passed here (either individually or</span>
<span class="doccomment">/// as part of an [`EventList`]), this command will not execute until</span>
<span class="doccomment">/// those commands have completed.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Using events can compliment the use of queues to order commands by</span>
<span class="doccomment">/// creating temporal dependencies between them (where commands in one</span>
<span class="doccomment">/// queue must wait for the completion of commands in another). Events can</span>
<span class="doccomment">/// also supplant queues altogether when, for example, using out-of-order</span>
<span class="doccomment">/// queues.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Example</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust,ignore</span>
<span class="doccomment">/// // Create an event list:</span>
<span class="doccomment">/// let mut event_list = EventList::new();</span>
<span class="doccomment">/// // Enqueue a kernel on `queue_1`, creating an event representing the kernel</span>
<span class="doccomment">/// // command in our list:</span>
<span class="doccomment">/// kernel.cmd().queue(&queue_1).enew(&mut event_list).enq()?;</span>
<span class="doccomment">/// // Map a buffer using `queue_2`, ensuring the map does not begin until</span>
<span class="doccomment">/// // after the kernel command has completed:</span>
<span class="doccomment">/// buffer.map().queue(&queue_2).ewait(&event_list).enq_async()?;</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`EventList`]: struct.EventList.html</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">ewait</span><span class="op"><</span><span class="lifetime">'e</span>, <span class="ident">Ewl</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">ewait</span>: <span class="ident">Ewl</span>) <span class="op">-></span> <span class="ident">BufferMapCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="lifetime">'e</span>: <span class="lifetime">'c</span>, <span class="ident">Ewl</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">ClWaitListPtrEnum</span><span class="op"><</span><span class="lifetime">'e</span><span class="op">>></span> {
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">ewait</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">ewait</span>.<span class="ident">into</span>());
<span class="self">self</span>
}
<span class="doccomment">/// Specifies the destination to store a new, optionally created event</span>
<span class="doccomment">/// associated with this command.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The destination can be a mutable reference to an empty event (created</span>
<span class="doccomment">/// using [`Event::empty`]) or a mutable reference to an event list.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// After this command is enqueued, the event in the destination can be</span>
<span class="doccomment">/// passed to the `::ewait` method of another command. Doing so will cause</span>
<span class="doccomment">/// the other command to wait until this command has completed before</span>
<span class="doccomment">/// executing.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Using events can compliment the use of queues to order commands by</span>
<span class="doccomment">/// creating temporal dependencies between them (where commands in one</span>
<span class="doccomment">/// queue must wait for the completion of commands in another). Events can</span>
<span class="doccomment">/// also supplant queues altogether when, for example, using out-of-order</span>
<span class="doccomment">/// queues.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Example</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust,ignore</span>
<span class="doccomment">/// // Create an event list:</span>
<span class="doccomment">/// let mut event = Event::empty();</span>
<span class="doccomment">/// // Enqueue a kernel on `queue_1`, creating an event representing the kernel</span>
<span class="doccomment">/// // command in our list:</span>
<span class="doccomment">/// kernel.cmd().queue(&queue_1).enew(&mut event).enq()?;</span>
<span class="doccomment">/// // Map a buffer using `queue_2`, ensuring the map does not begin until</span>
<span class="doccomment">/// // after the kernel command has completed:</span>
<span class="doccomment">/// buffer.map().queue(&queue_2).ewait(&event).enq_async()?;</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`Event::empty`]: struct.Event.html#method.empty</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">enew</span><span class="op"><</span><span class="lifetime">'e</span>, <span class="ident">En</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">enew</span>: <span class="ident">En</span>) <span class="op">-></span> <span class="ident">BufferMapCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="lifetime">'e</span>: <span class="lifetime">'c</span>, <span class="ident">En</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">ClNullEventPtrEnum</span><span class="op"><</span><span class="lifetime">'e</span><span class="op">>></span> {
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">enew</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">enew</span>.<span class="ident">into</span>());
<span class="self">self</span>
}
<span class="doccomment">/// Returns operation details.</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">enq_details</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">OclResult</span><span class="op"><</span>(<span class="ident">usize</span>, <span class="ident">usize</span>, <span class="kw-2">&</span><span class="ident">Queue</span>, <span class="ident">MapFlags</span>,
<span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">ClWaitListPtrEnum</span><span class="op"><</span><span class="lifetime">'c</span><span class="op">>></span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">ClNullEventPtrEnum</span><span class="op"><</span><span class="lifetime">'c</span><span class="op">>></span>)<span class="op">></span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">BufferCmdKind</span>::<span class="ident">Map</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">kind</span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">BufferCmdDataShape</span>::<span class="ident">Lin</span> { <span class="ident">offset</span> } <span class="op">=</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">shape</span> {
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">len</span> {
<span class="prelude-val">Some</span>(<span class="ident">l</span>) <span class="op">=></span> <span class="ident">l</span>,
<span class="prelude-val">None</span> <span class="op">=></span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">mem_len</span>,
};
<span class="ident">check_len</span>(<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">mem_len</span>, <span class="ident">len</span>, <span class="ident">offset</span>)<span class="question-mark">?</span>;
<span class="kw">let</span> <span class="ident">queue</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">queue</span> {
<span class="prelude-val">Some</span>(<span class="ident">q</span>) <span class="op">=></span> <span class="ident">q</span>,
<span class="prelude-val">None</span> <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">BufferCmdError</span>::<span class="ident">NoQueue</span>.<span class="ident">into</span>()),
};
<span class="kw">let</span> <span class="ident">flags</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">flags</span>.<span class="ident">unwrap_or</span>(<span class="ident">MapFlags</span>::<span class="ident">empty</span>());
<span class="prelude-val">Ok</span>((<span class="ident">offset</span>, <span class="ident">len</span>, <span class="ident">queue</span>, <span class="ident">flags</span>, <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">ewait</span>.<span class="ident">take</span>(), <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">enew</span>.<span class="ident">take</span>()))
} <span class="kw">else</span> {
<span class="prelude-val">Err</span>(<span class="ident">BufferCmdError</span>::<span class="ident">RectUnavailable</span>.<span class="ident">into</span>())
}
} <span class="kw">else</span> {
<span class="macro">unreachable</span><span class="macro">!</span>();
}
}
<span class="doccomment">/// Enqueues a map command, blocking the current thread until it</span>
<span class="doccomment">/// completes and returns a reference to the mapped memory.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ## Safety</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The caller must ensure that either only one mapping of a buffer exists</span>
<span class="doccomment">/// at a time or that, if simultaneously mapping for the purposes of</span>
<span class="doccomment">/// sub-region access or whole-buffer aliasing, no two mappings will allow</span>
<span class="doccomment">/// writes to the same memory region at the same time. Use atomics or some</span>
<span class="doccomment">/// other synchronization mechanism to ensure this.</span>
<span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">enq</span>(<span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">OclResult</span><span class="op"><</span><span class="ident">MemMap</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span> {
<span class="kw">let</span> (<span class="ident">offset</span>, <span class="ident">len</span>, <span class="ident">queue</span>, <span class="ident">flags</span>, <span class="ident">ewait</span>, <span class="ident">enew</span>, <span class="comment">/*is_mapped*/</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">enq_details</span>()<span class="question-mark">?</span>;
<span class="kw">let</span> <span class="ident">mm_core</span> <span class="op">=</span> <span class="ident">core</span>::<span class="ident">enqueue_map_buffer</span>::<span class="op"><</span><span class="ident">T</span>, _, _, _<span class="op">></span>(<span class="ident">queue</span>,
<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">buffer</span>.<span class="ident">obj_core</span>, <span class="bool-val">true</span>, <span class="ident">flags</span>, <span class="ident">offset</span>, <span class="ident">len</span>, <span class="ident">ewait</span>, <span class="ident">enew</span>)<span class="question-mark">?</span>;
<span class="kw">let</span> <span class="ident">unmap_event</span> <span class="op">=</span> <span class="prelude-val">None</span>;
<span class="prelude-val">Ok</span>(<span class="ident">MemMap</span>::<span class="ident">new</span>(<span class="ident">mm_core</span>, <span class="ident">len</span>, <span class="prelude-val">None</span>, <span class="ident">unmap_event</span>, <span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">buffer</span>.<span class="ident">obj_core</span>.<span class="ident">clone</span>(),
<span class="ident">queue</span>.<span class="ident">clone</span>()))
}
<span class="doccomment">/// Enqueues a map command and returns a future representing the</span>
<span class="doccomment">/// completion of that map command.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The returned future will resolve to a reference to the mapped memory.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ## Safety</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The caller must ensure that either only one mapping of a buffer exists</span>
<span class="doccomment">/// at a time or that, if simultaneously mapping for the purposes of</span>
<span class="doccomment">/// sub-region access or whole-buffer aliasing, no two mappings will allow</span>
<span class="doccomment">/// writes to the same memory region at the same time. Use atomics or some</span>
<span class="doccomment">/// other synchronization mechanism to ensure this.</span>
<span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">enq_async</span>(<span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">OclResult</span><span class="op"><</span><span class="ident">FutureMemMap</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span> {
<span class="kw">let</span> (<span class="ident">offset</span>, <span class="ident">len</span>, <span class="ident">queue</span>, <span class="ident">flags</span>, <span class="ident">ewait</span>, <span class="ident">enew</span>, <span class="comment">/*is_mapped*/</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">enq_details</span>()<span class="question-mark">?</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">map_event</span> <span class="op">=</span> <span class="ident">Event</span>::<span class="ident">empty</span>();
<span class="kw">let</span> <span class="ident">mm_core</span> <span class="op">=</span> <span class="ident">core</span>::<span class="ident">enqueue_map_buffer</span>::<span class="op"><</span><span class="ident">T</span>, _, _, _<span class="op">></span>(<span class="ident">queue</span>,
<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">buffer</span>.<span class="ident">obj_core</span>, <span class="bool-val">false</span>, <span class="ident">flags</span>, <span class="ident">offset</span>, <span class="ident">len</span>, <span class="ident">ewait</span>,
<span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">map_event</span>))<span class="question-mark">?</span>;
<span class="comment">// If a 'new/null event' has been set, copy pointer</span>
<span class="comment">// into it and increase refcount (to 2).</span>
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">mut</span> <span class="ident">self_enew</span>) <span class="op">=</span> <span class="ident">enew</span> {
<span class="comment">// map_event/self_enew refcount: 2</span>
<span class="ident">self_enew</span>.<span class="ident">clone_from</span>(<span class="kw-2">&</span><span class="ident">map_event</span>)
}
<span class="prelude-val">Ok</span>(<span class="ident">FutureMemMap</span>::<span class="ident">new</span>(<span class="ident">mm_core</span>, <span class="ident">len</span>, <span class="ident">map_event</span>,
<span class="self">self</span>.<span class="ident">cmd</span>.<span class="ident">buffer</span>.<span class="ident">obj_core</span>.<span class="ident">clone</span>(), <span class="ident">queue</span>.<span class="ident">clone</span>(), <span class="comment">/*is_mapped*/</span>))
}
}
<span class="doccomment">/// A chunk of memory physically located on a device, such as a GPU.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Data is stored remotely in a memory buffer on the device associated with</span>
<span class="doccomment">/// `queue`.</span>
<span class="doccomment">///</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">OclPrm</span><span class="op">></span> {
<span class="ident">obj_core</span>: <span class="ident">MemCore</span>,
<span class="ident">queue</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Queue</span><span class="op">></span>,
<span class="ident">len</span>: <span class="ident">usize</span>,
<span class="ident">offset</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>,
<span class="ident">_data</span>: <span class="ident">PhantomData</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">OclPrm</span><span class="op">></span> <span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="doccomment">/// Returns a new buffer builder.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This is the preferred (and forward compatible) way to create a buffer.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">builder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>() <span class="op">-></span> <span class="ident">BufferBuilder</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">BufferBuilder</span>::<span class="ident">new</span>()
}
<span class="doccomment">/// Creates a new buffer.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [UNSTABLE]: Arguments may still be in a state of flux. It is</span>
<span class="doccomment">/// recommended to use `::builder` instead.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See the [`BufferBuilder`] and [SDK] documentation for argument</span>
<span class="doccomment">/// details.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ### Safety</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Incorrectly using flags and/or host_slice is unsafe.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`BufferBuilder`]: builders/struct.BufferBuilder.html</span>
<span class="doccomment">/// [SDK]: https://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCreateBuffer.html</span>
<span class="doccomment">///</span>
<span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">new</span><span class="op"><</span><span class="lifetime">'e</span>, <span class="lifetime">'o</span>, <span class="ident">Q</span>, <span class="ident">D</span><span class="op">></span>(<span class="ident">que_ctx</span>: <span class="ident">Q</span>, <span class="ident">flags</span>: <span class="ident">MemFlags</span>, <span class="ident">len</span>: <span class="ident">D</span>,
<span class="ident">host_slice</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span>[<span class="ident">T</span>]<span class="op">></span>) <span class="op">-></span> <span class="ident">OclResult</span><span class="op"><</span><span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span>
<span class="kw">where</span> <span class="ident">Q</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">QueCtx</span><span class="op"><</span><span class="lifetime">'o</span><span class="op">>></span>, <span class="ident">D</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">SpatialDims</span><span class="op">></span> {
<span class="comment">// let flags = flags_opt.unwrap_or(::flags::MEM_READ_WRITE);</span>
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">len</span>.<span class="ident">into</span>().<span class="ident">to_len</span>();
<span class="kw">let</span> <span class="ident">que_ctx</span> <span class="op">=</span> <span class="ident">que_ctx</span>.<span class="ident">into</span>();
<span class="kw">let</span> <span class="ident">ctx_owned</span>;
<span class="kw">let</span> <span class="ident">ctx_ref</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">que_ctx</span> {
<span class="ident">QueCtx</span>::<span class="ident">Queue</span>(<span class="kw-2">ref</span> <span class="ident">q</span>) <span class="op">=></span> {
<span class="ident">ctx_owned</span> <span class="op">=</span> <span class="ident">q</span>.<span class="ident">context</span>();
<span class="kw-2">&</span><span class="ident">ctx_owned</span>
},
<span class="ident">QueCtx</span>::<span class="ident">Context</span>(<span class="ident">c</span>) <span class="op">=></span> <span class="ident">c</span>,
};
<span class="kw">let</span> <span class="ident">obj_core</span> <span class="op">=</span> <span class="ident">core</span>::<span class="ident">create_buffer</span>(<span class="ident">ctx_ref</span>, <span class="ident">flags</span>, <span class="ident">len</span>, <span class="ident">host_slice</span>)<span class="question-mark">?</span>;
<span class="macro">debug_assert</span><span class="macro">!</span>({
<span class="kw">let</span> <span class="ident">l_r</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">core</span>::<span class="ident">get_mem_object_info</span>(<span class="kw-2">&</span><span class="ident">obj_core</span>, <span class="ident">MemInfo</span>::<span class="ident">Size</span>)<span class="question-mark">?</span> {
<span class="ident">MemInfoResult</span>::<span class="ident">Size</span>(<span class="ident">len_bytes</span>) <span class="op">=></span> <span class="ident">len_bytes</span> <span class="op">/</span> ::<span class="ident">std</span>::<span class="ident">mem</span>::<span class="ident">size_of</span>::<span class="op"><</span><span class="ident">T</span><span class="op">></span>(),
_ <span class="op">=></span> <span class="macro">unreachable</span><span class="macro">!</span>(),
};
<span class="ident">l_r</span> <span class="op">==</span> <span class="ident">len</span>
});
<span class="kw">let</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">Buffer</span> {
<span class="ident">obj_core</span>,
<span class="ident">queue</span>: <span class="ident">que_ctx</span>.<span class="ident">into</span>(),
<span class="ident">len</span>,
<span class="ident">offset</span>: <span class="prelude-val">None</span>,
<span class="ident">_data</span>: <span class="ident">PhantomData</span>,
};
<span class="prelude-val">Ok</span>(<span class="ident">buf</span>)
}
<span class="doccomment">/// Creates a buffer linked to a previously created OpenGL buffer object.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [UNTESTED]</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ### Errors</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Don't forget to `.cmd().gl_acquire().enq()` before using it and</span>
<span class="doccomment">/// `.cmd().gl_release().enq()` after.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See the [`BufferCmd` docs](builders/struct.BufferCmd.html)</span>
<span class="doccomment">/// for more info.</span>
<span class="doccomment">///</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span><span class="op">=</span><span class="string">"opencl_vendor_mesa"</span>))]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">from_gl_buffer</span><span class="op"><</span><span class="lifetime">'o</span>, <span class="ident">Q</span><span class="op">></span>(<span class="ident">que_ctx</span>: <span class="ident">Q</span>, <span class="ident">flags_opt</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">MemFlags</span><span class="op">></span>, <span class="ident">gl_object</span>: <span class="ident">cl_GLuint</span>)
<span class="op">-></span> <span class="ident">OclResult</span><span class="op"><</span><span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span>
<span class="kw">where</span> <span class="ident">Q</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">QueCtx</span><span class="op"><</span><span class="lifetime">'o</span><span class="op">>></span> {
<span class="kw">let</span> <span class="ident">flags</span> <span class="op">=</span> <span class="ident">flags_opt</span>.<span class="ident">unwrap_or</span>(<span class="ident">core</span>::<span class="ident">MEM_READ_WRITE</span>);
<span class="kw">let</span> <span class="ident">que_ctx</span> <span class="op">=</span> <span class="ident">que_ctx</span>.<span class="ident">into</span>();
<span class="kw">let</span> <span class="ident">obj_core</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">que_ctx</span> {
<span class="ident">QueCtx</span>::<span class="ident">Queue</span>(<span class="kw-2">ref</span> <span class="ident">q</span>) <span class="op">=></span> <span class="kw">unsafe</span> { <span class="ident">core</span>::<span class="ident">create_from_gl_buffer</span>(<span class="kw-2">&</span><span class="ident">q</span>.<span class="ident">context</span>(), <span class="ident">gl_object</span>, <span class="ident">flags</span>)<span class="question-mark">?</span> },
<span class="ident">QueCtx</span>::<span class="ident">Context</span>(<span class="ident">c</span>) <span class="op">=></span> <span class="kw">unsafe</span> { <span class="ident">core</span>::<span class="ident">create_from_gl_buffer</span>(<span class="ident">c</span>, <span class="ident">gl_object</span>, <span class="ident">flags</span>)<span class="question-mark">?</span> },
};
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">core</span>::<span class="ident">get_mem_object_info</span>(<span class="kw-2">&</span><span class="ident">obj_core</span>, <span class="ident">MemInfo</span>::<span class="ident">Size</span>)<span class="question-mark">?</span> {
<span class="ident">MemInfoResult</span>::<span class="ident">Size</span>(<span class="ident">len_bytes</span>) <span class="op">=></span> <span class="ident">len_bytes</span> <span class="op">/</span> ::<span class="ident">std</span>::<span class="ident">mem</span>::<span class="ident">size_of</span>::<span class="op"><</span><span class="ident">T</span><span class="op">></span>(),
_ <span class="op">=></span> <span class="macro">unreachable</span><span class="macro">!</span>(),
};
<span class="kw">let</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">Buffer</span> {
<span class="ident">obj_core</span>,
<span class="ident">queue</span>: <span class="ident">que_ctx</span>.<span class="ident">into</span>(),
<span class="ident">len</span>,
<span class="ident">offset</span>: <span class="prelude-val">None</span>,
<span class="ident">_data</span>: <span class="ident">PhantomData</span>,
};
<span class="prelude-val">Ok</span>(<span class="ident">buf</span>)
}
<span class="doccomment">/// Returns a command builder used to read, write, copy, etc.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Call `.enq()` to enqueue the command.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See the [command builder documentation](builders/struct.BufferCmd)</span>
<span class="doccomment">/// for more details.</span>
<span class="doccomment">///</span>
<span class="doccomment">///</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">cmd</span><span class="op"><</span><span class="lifetime">'c</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'c</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">BufferCmd</span>::<span class="ident">new</span>(<span class="self">self</span>, <span class="self">self</span>.<span class="ident">queue</span>.<span class="ident">as_ref</span>(), <span class="comment">/*&self.obj_core,*/</span> <span class="self">self</span>.<span class="ident">len</span>())
}
<span class="doccomment">/// Returns a command builder used to read data.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Call `.enq()` to enqueue the command.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See the [command builder documentation](builders/struct.BufferCmd#method.read)</span>
<span class="doccomment">/// for more details.</span>
<span class="doccomment">///</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">read</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">R</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'c</span> <span class="self">self</span>, <span class="ident">dst</span>: <span class="ident">R</span>) <span class="op">-></span> <span class="ident">BufferReadCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="lifetime">'d</span>: <span class="lifetime">'c</span>, <span class="ident">R</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">ReadDst</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">>></span>
{
<span class="self">self</span>.<span class="ident">cmd</span>().<span class="ident">read</span>(<span class="ident">dst</span>)
}
<span class="doccomment">/// Returns a command builder used to write data.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Call `.enq()` to enqueue the command.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See the [command builder documentation](builders/struct.BufferCmd#method.write)</span>
<span class="doccomment">/// for more details.</span>
<span class="doccomment">///</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">write</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">W</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'c</span> <span class="self">self</span>, <span class="ident">src</span>: <span class="ident">W</span>) <span class="op">-></span> <span class="ident">BufferWriteCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="lifetime">'d</span>: <span class="lifetime">'c</span>, <span class="ident">W</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">WriteSrc</span><span class="op"><</span><span class="lifetime">'d</span>, <span class="ident">T</span><span class="op">>></span>
{
<span class="self">self</span>.<span class="ident">cmd</span>().<span class="ident">write</span>(<span class="ident">src</span>)
}
<span class="doccomment">/// Returns a command builder used to map data for reading or writing.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Enqueuing a map command will map a region of a buffer into the host</span>
<span class="doccomment">/// address space and return a [`MemMap`] or [`FutureMemMap`], allowing</span>
<span class="doccomment">/// access to this mapped region. Accessing memory via a [`MemMap`] is</span>
<span class="doccomment">/// exactly like using a [slice].</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Call `.enq()` to enqueue the command.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ### More Information</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See the [command builder</span>
<span class="doccomment">/// documentation](builders/struct.BufferCmd#method.map) or</span>
<span class="doccomment">/// [official SDK][map_buffer] for more details.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [map_buffer]: https://www.khronos.org/registry/OpenCL/sdk/1.2/docs/man/xhtml/clEnqueueMapBuffer.html</span>
<span class="doccomment">/// [`MemMap`]: struct.MemMap.html</span>
<span class="doccomment">/// [`FutureMemMap`]: async/struct.FutureMemMap.html</span>
<span class="doccomment">/// [slice]: https://doc.rust-lang.org/std/primitive.slice.html</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">map</span><span class="op"><</span><span class="lifetime">'c</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'c</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">BufferMapCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">cmd</span>().<span class="ident">map</span>()
}
<span class="doccomment">/// Specifies that this command will be a copy operation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Call `.enq()` to enqueue the command.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See the [command builder documentation](builders/struct.BufferCmd#method.copy)</span>
<span class="doccomment">/// for more details.</span>
<span class="doccomment">///</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">copy</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">M</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'c</span> <span class="self">self</span>, <span class="ident">dst_buffer</span>: <span class="kw-2">&</span><span class="lifetime">'c</span> <span class="ident">M</span>, <span class="ident">dst_offset</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>, <span class="ident">len</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>)
<span class="op">-></span> <span class="ident">BufferCmd</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">M</span>: <span class="ident">AsMem</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">cmd</span>().<span class="ident">copy</span>(<span class="ident">dst_buffer</span>, <span class="ident">dst_offset</span>, <span class="ident">len</span>)
}
<span class="comment">// /// Returns the origin of the sub-buffer within its buffer if this is a</span>
<span class="comment">// /// sub-buffer.</span>
<span class="comment">// #[inline]</span>
<span class="comment">// pub fn origin(&self) -> Option<&SpatialDims> {</span>
<span class="comment">// self.origin.as_ref()</span>
<span class="comment">// }</span>
<span class="doccomment">/// Returns the offset of the sub-buffer within its buffer if this is a</span>
<span class="doccomment">/// sub-buffer.</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">offset</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> {
<span class="comment">// if self.is_sub_buffer() {</span>
<span class="comment">// match self.mem_info(MemInfo::Offset)? {</span>
<span class="comment">// MemInfoResult::Offset(off) => Ok(Some(off)),</span>
<span class="comment">// _ => unreachable!(),</span>
<span class="comment">// }</span>
<span class="comment">// } else {</span>
<span class="comment">// Ok(None)</span>
<span class="comment">// }</span>
<span class="self">self</span>.<span class="ident">offset</span>
}
<span class="doccomment">/// Returns the length of the buffer.</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> {
<span class="self">self</span>.<span class="ident">len</span>
}
<span class="comment">// /// Returns the length of the buffer.</span>
<span class="comment">// ///</span>
<span class="comment">// /// Equivalent to `::dims().to_len()`.</span>
<span class="comment">// #[inline]</span>
<span class="comment">// pub fn len(&self) -> usize {</span>
<span class="comment">// self.dims.to_len()</span>
<span class="comment">// }</span>
<span class="doccomment">/// Returns true if this is a sub-buffer.</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_sub_buffer</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="comment">// match self.mem_info(MemInfo::AssociatedMemobject) {</span>
<span class="comment">// MemInfoResult::AssociatedMemobject(Some(_)) => true,</span>
<span class="comment">// MemInfoResult::AssociatedMemobject(None) => false,</span>
<span class="comment">// _ => unreachable!(),</span>
<span class="comment">// }</span>
<span class="macro">debug_assert</span><span class="macro">!</span>({
<span class="kw">let</span> <span class="ident">is_sub_buffer</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">mem_info</span>(<span class="ident">MemInfo</span>::<span class="ident">AssociatedMemobject</span>).<span class="ident">unwrap</span>() {
<span class="ident">MemInfoResult</span>::<span class="ident">AssociatedMemobject</span>(<span class="prelude-val">Some</span>(_)) <span class="op">=></span> <span class="bool-val">true</span>,
<span class="ident">MemInfoResult</span>::<span class="ident">AssociatedMemobject</span>(<span class="prelude-val">None</span>) <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Buffer::is_sub_buffer"</span>),
_ <span class="op">=></span> <span class="macro">unreachable</span><span class="macro">!</span>(),
};
<span class="self">self</span>.<span class="ident">offset</span>.<span class="ident">is_some</span>() <span class="op">==</span> <span class="ident">is_sub_buffer</span>
});
<span class="self">self</span>.<span class="ident">offset</span>.<span class="ident">is_some</span>()
}
<span class="doccomment">/// Returns info about the underlying memory object.</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">mem_info</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">info_kind</span>: <span class="ident">MemInfo</span>) <span class="op">-></span> <span class="ident">OclCoreResult</span><span class="op"><</span><span class="ident">MemInfoResult</span><span class="op">></span> {
<span class="ident">core</span>::<span class="ident">get_mem_object_info</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">obj_core</span>, <span class="ident">info_kind</span>)
}
<span class="doccomment">/// Changes the default queue used by this buffer for all subsequent</span>
<span class="doccomment">/// command enqueue operations (reads, writes, etc.).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The default queue is the queue which will be used when enqueuing</span>
<span class="doccomment">/// commands if no queue is specified.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Without a default queue:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust,ignore</span>
<span class="doccomment">/// buffer.read(data).queue(&queue).enq()?;</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// With a default queue:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust,ignore</span>
<span class="doccomment">/// buffer.set_default_queue(queue.clone());</span>
<span class="doccomment">/// buffer.read(data).enq()?;</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The default queue can also be set when creating a buffer by using the</span>
<span class="doccomment">/// [`BufferBuilder::queue`] method.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method returns a mutable reference for optional chaining i.e.:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust,ignore</span>
<span class="doccomment">/// buffer.set_default_queue(queue).read(....)...;</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`BufferBuilder::queue`]: builders/struct.BufferBuilder.html#method.queue</span>
<span class="comment">//</span>
<span class="comment">// TODO: Allow `Option<Queue>` (to unset queue)?</span>
<span class="comment">//</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_default_queue</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">queue</span>: <span class="ident">Queue</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="comment">// [FIXME]: Update this to check whether new queue.device is within</span>
<span class="comment">// context or matching existing queue.</span>
<span class="comment">// assert!(queue.device() == self.que_ctx.queue().device());</span>
<span class="self">self</span>.<span class="ident">queue</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">queue</span>);
<span class="self">self</span>
}
<span class="doccomment">/// Returns a reference to the default queue.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The default queue is the queue which will be used when enqueuing</span>
<span class="doccomment">/// commands if no queue is specified.</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">default_queue</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">Queue</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">queue</span>.<span class="ident">as_ref</span>()
}
<span class="doccomment">/// Returns a reference to the core pointer wrapper, usable by functions in</span>
<span class="doccomment">/// the `core` module.</span>
<span class="doccomment">///</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_core</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">MemCore</span> {
<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">obj_core</span>
}
<span class="doccomment">/// Returns the memory flags used during the creation of this buffer.</span>
<span class="doccomment">///</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">flags</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">OclResult</span><span class="op"><</span><span class="ident">MemFlags</span><span class="op">></span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">mem_info</span>(<span class="ident">MemInfo</span>::<span class="ident">Flags</span>)<span class="question-mark">?</span> {
<span class="ident">MemInfoResult</span>::<span class="ident">Flags</span>(<span class="ident">flags</span>) <span class="op">=></span> <span class="prelude-val">Ok</span>(<span class="ident">flags</span>),
_ <span class="op">=></span> <span class="macro">unreachable</span><span class="macro">!</span>(),
}
}
<span class="comment">// /// Returns a reference to the `AtomicBool` tracking whether or not this</span>
<span class="comment">// /// buffer is mapped.</span>
<span class="comment">// ///</span>
<span class="comment">// /// If `None` is returned, this buffer is not able to be mapped.</span>
<span class="comment">// pub fn is_mapped(&self) -> Option<&Arc<AtomicBool>> {</span>
<span class="comment">// self.is_mapped.as_ref()</span>
<span class="comment">// }</span>
<span class="doccomment">/// Creates a new sub-buffer from a region of this buffer.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ### Flags (adapted from [SDK])</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [NOTE]: Flags described below can be found in the [`ocl::flags`] module</span>
<span class="doccomment">/// or within the [`MemFlags`][mem_flags] type (example:</span>
<span class="doccomment">/// [`MemFlags::new().read_write()`]).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// `flags`: A bit-field that is used to specify allocation and usage</span>
<span class="doccomment">/// information about the sub-buffer memory object being created and is</span>
<span class="doccomment">/// described in the table below. If the `MEM_READ_WRITE`, `MEM_READ_ONLY`</span>
<span class="doccomment">/// or `MEM_WRITE_ONLY` values are not specified in flags, they are</span>
<span class="doccomment">/// inherited from the corresponding memory access qualifers associated</span>
<span class="doccomment">/// with buffer. The `MEM_USE_HOST_PTR`, `MEM_ALLOC_HOST_PTR` and</span>
<span class="doccomment">/// `MEM_COPY_HOST_PTR` values cannot be specified in flags but are</span>
<span class="doccomment">/// inherited from the corresponding memory access qualifiers associated</span>
<span class="doccomment">/// with buffer. If `MEM_COPY_HOST_PTR` is specified in the memory access</span>
<span class="doccomment">/// qualifier values associated with buffer it does not imply any</span>
<span class="doccomment">/// additional copies when the sub-buffer is created from buffer. If the</span>
<span class="doccomment">/// `MEM_HOST_WRITE_ONLY`, `MEM_HOST_READ_ONLY` or `MEM_HOST_NO_ACCESS`</span>
<span class="doccomment">/// values are not specified in flags, they are inherited from the</span>
<span class="doccomment">/// corresponding memory access qualifiers associated with buffer.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ### Offset and Dimensions</span>
<span class="doccomment">///</span>
<span class="doccomment">/// `offset` and `len` set up the region of the sub-buffer within the</span>
<span class="doccomment">/// original buffer and must not fall beyond the boundaries of it.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// `offset` must be a multiple of the `DeviceInfo::MemBaseAddrAlign`</span>
<span class="doccomment">/// otherwise you will get a `CL_MISALIGNED_SUB_BUFFER_OFFSET` error. To</span>
<span class="doccomment">/// determine, use `Device::mem_base_addr_align` for the device associated</span>
<span class="doccomment">/// with the queue which will be use with this sub-buffer.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [SDK]: https://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCreateSubBuffer.html</span>
<span class="doccomment">/// [`ocl::flags`]: flags/index.html</span>
<span class="doccomment">/// [mem_flags]: flags/struct.MemFlags.html</span>
<span class="doccomment">/// [`MemFlags::new().read_write()`] flags/struct.MemFlags.html#method.read_write</span>
<span class="doccomment">///</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">create_sub_buffer</span><span class="op"><</span><span class="ident">Do</span>, <span class="ident">Dl</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">flags_opt</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">MemFlags</span><span class="op">></span>, <span class="ident">offset</span>: <span class="ident">Do</span>,
<span class="ident">len</span>: <span class="ident">Dl</span>) <span class="op">-></span> <span class="ident">OclResult</span><span class="op"><</span><span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span>
<span class="kw">where</span> <span class="ident">Do</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">SpatialDims</span><span class="op">></span>, <span class="ident">Dl</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">SpatialDims</span><span class="op">></span> {
<span class="kw">let</span> <span class="ident">flags</span> <span class="op">=</span> <span class="ident">flags_opt</span>.<span class="ident">unwrap_or</span>(::<span class="ident">flags</span>::<span class="ident">MEM_READ_WRITE</span>);
<span class="comment">// Check flags here to preempt a somewhat vague OpenCL runtime error message:</span>
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">flags</span>.<span class="ident">contains</span>(::<span class="ident">flags</span>::<span class="ident">MEM_USE_HOST_PTR</span>) <span class="op">&&</span>
<span class="op">!</span><span class="ident">flags</span>.<span class="ident">contains</span>(::<span class="ident">flags</span>::<span class="ident">MEM_ALLOC_HOST_PTR</span>) <span class="op">&&</span>
<span class="op">!</span><span class="ident">flags</span>.<span class="ident">contains</span>(::<span class="ident">flags</span>::<span class="ident">MEM_COPY_HOST_PTR</span>),
<span class="string">"'MEM_USE_HOST_PTR', 'MEM_ALLOC_HOST_PTR', or 'MEM_COPY_HOST_PTR' flags may \
not be specified when creating a sub-buffer. They will be inherited from \
the containing buffer."</span>);
<span class="kw">let</span> <span class="ident">offset</span> <span class="op">=</span> <span class="ident">offset</span>.<span class="ident">into</span>().<span class="ident">to_len</span>();
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">len</span>.<span class="ident">into</span>().<span class="ident">to_len</span>();
<span class="kw">let</span> <span class="ident">buffer_len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">len</span>();
<span class="comment">// let offsets = origin.to_len();</span>
<span class="comment">// let len = dims.to_len();</span>
<span class="kw">if</span> <span class="ident">offset</span> <span class="op">></span> <span class="ident">buffer_len</span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">"Buffer::create_sub_buffer: Origin ({:?}) is outside of the \
dimensions of the source buffer ({:?})."</span>, <span class="ident">offset</span>, <span class="ident">buffer_len</span>).<span class="ident">into</span>());
}
<span class="kw">if</span> <span class="ident">offset</span> <span class="op">+</span> <span class="ident">len</span> <span class="op">></span> <span class="ident">buffer_len</span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">"Buffer::create_sub_buffer: Sub-buffer region (origin: '{:?}', \
len: '{:?}') exceeds the dimensions of the source buffer ({:?})."</span>,
<span class="ident">offset</span>, <span class="ident">len</span>, <span class="ident">buffer_len</span>).<span class="ident">into</span>());
}
<span class="kw">let</span> <span class="ident">obj_core</span> <span class="op">=</span> <span class="ident">core</span>::<span class="ident">create_sub_buffer</span>::<span class="op"><</span><span class="ident">T</span><span class="op">></span>(<span class="self">self</span>, <span class="ident">flags</span>,
<span class="kw-2">&</span><span class="ident">BufferRegion</span>::<span class="ident">new</span>(<span class="ident">offset</span>, <span class="ident">len</span>))<span class="question-mark">?</span>;
<span class="prelude-val">Ok</span>(<span class="ident">Buffer</span> {
<span class="ident">obj_core</span>: <span class="ident">obj_core</span>,
<span class="ident">queue</span>: <span class="self">self</span>.<span class="ident">default_queue</span>().<span class="ident">cloned</span>(),
<span class="ident">len</span>,
<span class="comment">// Share mapped status with super-buffer:</span>
<span class="comment">// is_mapped: self.is_mapped.clone(),</span>
<span class="ident">offset</span>: <span class="prelude-val">Some</span>(<span class="ident">offset</span>),
<span class="ident">_data</span>: <span class="ident">PhantomData</span>,
})
}
<span class="doccomment">/// Formats memory info.</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">fmt_mem_info</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">std</span>::<span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">std</span>::<span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">f</span>.<span class="ident">debug_struct</span>(<span class="string">"Buffer Mem"</span>)
.<span class="ident">field</span>(<span class="string">"Type"</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">mem_info</span>(<span class="ident">MemInfo</span>::<span class="ident">Type</span>))
.<span class="ident">field</span>(<span class="string">"Flags"</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">mem_info</span>(<span class="ident">MemInfo</span>::<span class="ident">Flags</span>))
.<span class="ident">field</span>(<span class="string">"Size"</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">mem_info</span>(<span class="ident">MemInfo</span>::<span class="ident">Size</span>))
.<span class="ident">field</span>(<span class="string">"HostPtr"</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">mem_info</span>(<span class="ident">MemInfo</span>::<span class="ident">HostPtr</span>))
.<span class="ident">field</span>(<span class="string">"MapCount"</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">mem_info</span>(<span class="ident">MemInfo</span>::<span class="ident">MapCount</span>))
.<span class="ident">field</span>(<span class="string">"ReferenceCount"</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">mem_info</span>(<span class="ident">MemInfo</span>::<span class="ident">ReferenceCount</span>))
.<span class="ident">field</span>(<span class="string">"Context"</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">mem_info</span>(<span class="ident">MemInfo</span>::<span class="ident">Context</span>))
.<span class="ident">field</span>(<span class="string">"AssociatedMemobject"</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">mem_info</span>(<span class="ident">MemInfo</span>::<span class="ident">AssociatedMemobject</span>))
.<span class="ident">field</span>(<span class="string">"Offset"</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">mem_info</span>(<span class="ident">MemInfo</span>::<span class="ident">Offset</span>))
.<span class="ident">finish</span>()
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">OclPrm</span><span class="op">></span> <span class="ident">Deref</span> <span class="kw">for</span> <span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Target</span> <span class="op">=</span> <span class="ident">MemCore</span>;
<span class="kw">fn</span> <span class="ident">deref</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">MemCore</span> {
<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">obj_core</span>
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">OclPrm</span><span class="op">></span> <span class="ident">DerefMut</span> <span class="kw">for</span> <span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">deref_mut</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">MemCore</span> {
<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>.<span class="ident">obj_core</span>
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">OclPrm</span><span class="op">></span> <span class="ident">AsRef</span><span class="op"><</span><span class="ident">MemCore</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">as_ref</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">MemCore</span> {
<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">obj_core</span>
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">OclPrm</span><span class="op">></span> <span class="ident">AsMut</span><span class="op"><</span><span class="ident">MemCore</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">as_mut</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">MemCore</span> {
<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>.<span class="ident">obj_core</span>
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">OclPrm</span><span class="op">></span> <span class="ident">AsMem</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">as_mem</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">MemCore</span> {
<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">obj_core</span>
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">OclPrm</span><span class="op">></span> <span class="ident">std</span>::<span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">std</span>::<span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">std</span>::<span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="self">self</span>.<span class="ident">fmt_mem_info</span>(<span class="ident">f</span>)
}
}
<span class="kw">unsafe</span> <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">MemCmdRw</span> <span class="kw">for</span> <span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {}
<span class="kw">unsafe</span> <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">MemCmdRw</span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {}
<span class="kw">unsafe</span> <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">MemCmdRw</span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {}
<span class="kw">unsafe</span> <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">MemCmdAll</span> <span class="kw">for</span> <span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {}
<span class="kw">unsafe</span> <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">MemCmdAll</span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {}
<span class="kw">unsafe</span> <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">MemCmdAll</span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {}
<span class="doccomment">/// A buffer builder.</span>
<span class="doccomment">///</span>
<span class="comment">// * TODO: Add examples and details. For now see project examples folder.</span>
<span class="comment">// * TODO: Consider converting this to a re-usable builder.</span>
<span class="comment">//</span>
<span class="attribute">#[<span class="ident">must_use</span> <span class="op">=</span> <span class="string">"builders do nothing unless '::build' is called"</span>]</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">BufferBuilder</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">OclPrm</span> {
<span class="ident">queue_option</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">QueCtx</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">>></span>,
<span class="ident">flags</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">MemFlags</span><span class="op">></span>,
<span class="ident">host_slice</span>: <span class="ident">HostSlice</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span>,
<span class="ident">len</span>: <span class="ident">usize</span>,
<span class="ident">fill_val</span>: <span class="prelude-ty">Option</span><span class="op"><</span>(<span class="ident">T</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">ClNullEventPtrEnum</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">>></span>)<span class="op">></span>
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">BufferBuilder</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="lifetime">'a</span> <span class="op">+</span> <span class="ident">OclPrm</span> {
<span class="doccomment">/// Returns a new buffer builder.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-></span> <span class="ident">BufferBuilder</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="ident">BufferBuilder</span> {
<span class="ident">queue_option</span>: <span class="prelude-val">None</span>,
<span class="ident">flags</span>: <span class="prelude-val">None</span>,
<span class="ident">host_slice</span>: <span class="ident">HostSlice</span>::<span class="prelude-val">None</span>,
<span class="ident">len</span>: <span class="number">0</span>,
<span class="ident">fill_val</span>: <span class="prelude-val">None</span>,
}
}
<span class="doccomment">/// Sets the context with which to associate the buffer.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// May not be used in conjunction with [`::queue`] (use one or the other).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`::queue`]: builders/struct.BufferBuilder.html#method.queue</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">context</span><span class="op"><</span><span class="lifetime">'o</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">context</span>: <span class="kw-2">&</span><span class="lifetime">'o</span> <span class="ident">Context</span>) <span class="op">-></span> <span class="ident">BufferBuilder</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="lifetime">'o</span>: <span class="lifetime">'a</span> {
<span class="macro">assert</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">queue_option</span>.<span class="ident">is_none</span>(), <span class="string">"A context or queue has already been set."</span>);
<span class="self">self</span>.<span class="ident">queue_option</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">QueCtx</span>::<span class="ident">Context</span>(<span class="ident">context</span>));
<span class="self">self</span>
}
<span class="doccomment">/// Specifies the default queue used to be used by the buffer for all</span>
<span class="doccomment">/// command enqueue operations (reads, writes, etc.).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The default queue is the queue which will be used when enqueuing</span>
<span class="doccomment">/// commands if no queue is specified.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Without a default queue:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust,ignore</span>
<span class="doccomment">/// buffer.read(data).queue(&queue).enq()?;</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// With a default queue:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust,ignore</span>
<span class="doccomment">/// buffer.read(data).enq()?;</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If this is set, the context associated with the `default_queue` will</span>
<span class="doccomment">/// be used when creating the buffer. Attempting to specify the context</span>
<span class="doccomment">/// separately (by calling [`::context`]) will cause a panic.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`::context`]: builders/struct.BufferBuilder.html#method.context</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">queue</span><span class="op"><</span><span class="lifetime">'b</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">default_queue</span>: <span class="ident">Queue</span>) <span class="op">-></span> <span class="ident">BufferBuilder</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="macro">assert</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">queue_option</span>.<span class="ident">is_none</span>(), <span class="string">"A context or queue has already been set."</span>);
<span class="self">self</span>.<span class="ident">queue_option</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">QueCtx</span>::<span class="ident">Queue</span>(<span class="ident">default_queue</span>));
<span class="self">self</span>
}
<span class="doccomment">/// Sets the flags used when creating the buffer.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Defaults to `flags::MEM_READ_WRITE` aka.</span>
<span class="doccomment">/// `MemFlags::new().read_write()` if this is not set. See the [SDK Docs]</span>
<span class="doccomment">/// for more information about flags. Note that the names of all flags in</span>
<span class="doccomment">/// this library have the `CL_` prefix removed for brevity.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ### Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Due to its unsafety, setting the</span>
<span class="doccomment">/// `MEM_USE_HOST_PTR`/`MemFlags::new()::use_host_ptr()` flag will cause a</span>
<span class="doccomment">/// panic. Use the `::use_host_slice` method instead.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [SDK Docs]: https://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCreateBuffer.html</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">flags</span><span class="op"><</span><span class="lifetime">'b</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">flags</span>: <span class="ident">MemFlags</span>) <span class="op">-></span> <span class="ident">BufferBuilder</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">flags</span>.<span class="ident">contains</span>(<span class="ident">MemFlags</span>::<span class="ident">new</span>().<span class="ident">use_host_ptr</span>()),
<span class="string">"The `BufferBuilder::flags` method may not be used to set the \
`MEM_USE_HOST_PTR` flag. Use the `::use_host_ptr` method instead."</span>);
<span class="self">self</span>.<span class="ident">flags</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">flags</span>);
<span class="self">self</span>
}
<span class="doccomment">/// Specifies a region of host memory to use as storage for the buffer.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// OpenCL implementations are allowed to cache the buffer contents</span>
<span class="doccomment">/// pointed to by `host_slice` in device memory. This cached copy can be</span>
<span class="doccomment">/// used when kernels are executed on a device.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The result of OpenCL commands that operate on multiple buffer objects</span>
<span class="doccomment">/// created with the same `host_slice` or overlapping host regions is</span>
<span class="doccomment">/// considered to be undefined</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Refer to the [description of the alignment][align_rules] rules for</span>
<span class="doccomment">/// `host_slice` for memory objects (buffer and images) created using</span>
<span class="doccomment">/// this method.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Automatically sets the `flags::MEM_USE_HOST_PTR` aka.</span>
<span class="doccomment">/// `MemFlags::new().use_host_ptr()` flag.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ### Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// `::copy_host_slice` or `::use_host_slice` must not have already been</span>
<span class="doccomment">/// called.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ### Safety</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The caller must ensure that `host_slice` lives until the buffer is</span>
<span class="doccomment">/// destroyed. The caller must also ensure that only one buffer uses</span>
<span class="doccomment">/// `host_slice` and that it is not tampered with inappropriately.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [align_rules]: https://www.khronos.org/registry/OpenCL/sdk/1.2/docs/man/xhtml/dataTypes.html</span>
<span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">use_host_slice</span><span class="op"><</span><span class="lifetime">'d</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">host_slice</span>: <span class="kw-2">&</span><span class="lifetime">'d</span> [<span class="ident">T</span>]) <span class="op">-></span> <span class="ident">BufferBuilder</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="lifetime">'d</span>: <span class="lifetime">'a</span> {
<span class="macro">assert</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">host_slice</span>.<span class="ident">is_none</span>(), <span class="string">"BufferBuilder::use_host_slice: \
A host slice has already been specified."</span>);
<span class="self">self</span>.<span class="ident">host_slice</span> <span class="op">=</span> <span class="ident">HostSlice</span>::<span class="ident">Use</span>(<span class="ident">host_slice</span>);
<span class="self">self</span>
}
<span class="doccomment">/// Specifies a region of memory to copy into the buffer upon creation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Automatically sets the `flags::MEM_COPY_HOST_PTR` aka.</span>
<span class="doccomment">/// `MemFlags::new().copy_host_ptr()` flag.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ### Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// `::copy_host_slice` or `::use_host_slice` must not have already been</span>
<span class="doccomment">/// called.</span>
<span class="doccomment">///</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">copy_host_slice</span><span class="op"><</span><span class="lifetime">'d</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">host_slice</span>: <span class="kw-2">&</span><span class="lifetime">'d</span> [<span class="ident">T</span>]) <span class="op">-></span> <span class="ident">BufferBuilder</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="lifetime">'d</span>: <span class="lifetime">'a</span> {
<span class="macro">assert</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">host_slice</span>.<span class="ident">is_none</span>(), <span class="string">"BufferBuilder::copy_host_slice: \
A host slice has already been specified."</span>);
<span class="self">self</span>.<span class="ident">host_slice</span> <span class="op">=</span> <span class="ident">HostSlice</span>::<span class="ident">Copy</span>(<span class="ident">host_slice</span>);
<span class="self">self</span>
}
<span class="doccomment">/// Sets the length for this buffer.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Note that although sizes in the standard OpenCL API are expressed in</span>
<span class="doccomment">/// bytes, sizes, lengths, and dimensions in this library are always</span>
<span class="doccomment">/// specified in `bytes / sizeof(T)` (like everything else in Rust) unless</span>
<span class="doccomment">/// otherwise noted.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">len</span><span class="op"><</span><span class="lifetime">'b</span>, <span class="ident">D</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">len</span>: <span class="ident">D</span>) <span class="op">-></span> <span class="ident">BufferBuilder</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">SpatialDims</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">len</span> <span class="op">=</span> <span class="ident">len</span>.<span class="ident">into</span>().<span class="ident">to_len</span>();
<span class="self">self</span>
}
<span class="doccomment">/// Allows the caller to automatically fill the buffer with a value (such</span>
<span class="doccomment">/// as zero) immediately after creation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Use [`::fill_event`] to set an event associated with the completion of</span>
<span class="doccomment">/// the fill command if you want it to execute asynchronously (it will</span>
<span class="doccomment">/// otherwise block the calling thread).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Platforms that have trouble with `clEnqueueFillBuffer` such as</span>
<span class="doccomment">/// [pocl](http://portablecl.org/) should not use this option and should</span>
<span class="doccomment">/// handle initializing buffers manually (using a kernel or copy host data</span>
<span class="doccomment">/// flag).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ### Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// * TODO: Provide examples once this stabilizes.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [UNSTABLE]: May be changed or removed.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`::fill_event`]: builders/struct.BufferBuilder.html#method.fill_event</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">fill_val</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">fill_val</span>: <span class="ident">T</span>) <span class="op">-></span> <span class="ident">BufferBuilder</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">fill_val</span> <span class="op">=</span> <span class="prelude-val">Some</span>((<span class="ident">fill_val</span>, <span class="prelude-val">None</span>));
<span class="self">self</span>
}
<span class="doccomment">/// Specifies the (empty) event to use for association with the completion</span>
<span class="doccomment">/// of the fill command.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// `enew` specifies an empty event (generally a `&mut Event`) to be</span>
<span class="doccomment">/// associated with the fill command which will be enqueued after creation</span>
<span class="doccomment">/// and just before returning the new buffer. It is up to the caller to</span>
<span class="doccomment">/// ensure that the command has completed before performing any other</span>
<span class="doccomment">/// operations on the buffer. Failure to do so may cause the fill command</span>
<span class="doccomment">/// to run **after** subsequently queued commands if multiple or</span>
<span class="doccomment">/// out-of-order queues are being used.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Not calling this method at all will cause the fill command to block</span>
<span class="doccomment">/// before returning the new buffer and is the safe option if you don't</span>
<span class="doccomment">/// want to worry about it.</span>
<span class="doccomment">///</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">fill_event</span><span class="op"><</span><span class="lifetime">'b</span>, <span class="lifetime">'e</span>, <span class="ident">En</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">enew</span>: <span class="ident">En</span>) <span class="op">-></span> <span class="ident">BufferBuilder</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="lifetime">'e</span>: <span class="lifetime">'a</span>, <span class="ident">En</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">ClNullEventPtrEnum</span><span class="op"><</span><span class="lifetime">'e</span><span class="op">>></span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">fill_val</span> {
<span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">fv</span>) <span class="op">=></span> <span class="macro">assert</span><span class="macro">!</span>(<span class="ident">fv</span>.<span class="number">1</span>.<span class="ident">is_some</span>(), <span class="string">"Buffer::fill_event: Fill event already set."</span>),
<span class="prelude-val">None</span> <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Buffer::fill_event: Fill value must be set first"</span>),
}
<span class="self">self</span>.<span class="ident">fill_val</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">fill_val</span>.<span class="ident">take</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">fv</span><span class="op">|</span> (<span class="ident">fv</span>.<span class="number">0</span>, <span class="prelude-val">Some</span>(<span class="ident">enew</span>.<span class="ident">into</span>())));
<span class="self">self</span>
}
<span class="doccomment">/// Creates a buffer and returns it.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Dimensions and either a context or default queue must be specified</span>
<span class="doccomment">/// before calling `::build`.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">build</span>(<span class="self">self</span>) <span class="op">-></span> <span class="ident">OclResult</span><span class="op"><</span><span class="ident">Buffer</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">flags</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">flags</span> {
<span class="prelude-val">Some</span>(<span class="ident">f</span>) <span class="op">=></span> <span class="ident">f</span>,
<span class="prelude-val">None</span> <span class="op">=></span> <span class="ident">MemFlags</span>::<span class="ident">new</span>().<span class="ident">read_write</span>(),
};
<span class="kw">let</span> <span class="ident">host_slice</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">host_slice</span> {
<span class="ident">HostSlice</span>::<span class="ident">Use</span>(<span class="ident">hs</span>) <span class="op">=></span> {
<span class="ident">flags</span>.<span class="ident">insert</span>(<span class="ident">MemFlags</span>::<span class="ident">new</span>().<span class="ident">use_host_ptr</span>());
<span class="prelude-val">Some</span>(<span class="ident">hs</span>)
}
<span class="ident">HostSlice</span>::<span class="ident">Copy</span>(<span class="ident">hs</span>) <span class="op">=></span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">fill_val</span>.<span class="ident">is_some</span>() {
<span class="macro">panic</span><span class="macro">!</span>(<span class="string">"ocl::BufferBuilder::build: Cannot create a buffer with both
'copy_host_slice' and 'fill_val' specified. Use one or the other."</span>);
}
<span class="ident">flags</span>.<span class="ident">insert</span>(<span class="ident">MemFlags</span>::<span class="ident">new</span>().<span class="ident">copy_host_ptr</span>());
<span class="prelude-val">Some</span>(<span class="ident">hs</span>)
},
<span class="ident">HostSlice</span>::<span class="prelude-val">None</span> <span class="op">=></span> <span class="prelude-val">None</span>,
};
<span class="kw">let</span> <span class="ident">qc</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">queue_option</span> {
<span class="prelude-val">Some</span>(<span class="ident">qc</span>) <span class="op">=></span> <span class="ident">qc</span>,
<span class="prelude-val">None</span> <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"ocl::BufferBuilder::build: A context or default queue must be set \
with '.context(...)' or '.queue(...)'."</span>),
};
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">len</span> {
<span class="number">0</span> <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"ocl::BufferBuilder::build: The length must be set with \
'.len(...)' and cannot be zero."</span>),
<span class="ident">l</span> @ _ <span class="op">=></span> <span class="ident">l</span>,
};
<span class="kw">let</span> <span class="ident">device_ver</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">qc</span> {
<span class="ident">QueCtx</span>::<span class="ident">Queue</span>(<span class="kw-2">ref</span> <span class="ident">queue</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">queue</span>.<span class="ident">device_version</span>()),
<span class="ident">QueCtx</span>::<span class="ident">Context</span>(_) <span class="op">=></span> <span class="prelude-val">None</span>,
};
<span class="kw">let</span> <span class="ident">buf</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">Buffer</span>::<span class="ident">new</span>(<span class="ident">qc</span>, <span class="ident">flags</span>, <span class="ident">len</span>, <span class="ident">host_slice</span>)<span class="question-mark">?</span> };
<span class="comment">// Fill buffer if `fill_val` and a queue have been specified,</span>
<span class="comment">// blocking if the `fill_event` is `None`.</span>
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>((<span class="ident">val</span>, <span class="ident">fill_event</span>)) <span class="op">=</span> <span class="self">self</span>.<span class="ident">fill_val</span> {
<span class="kw">match</span> <span class="ident">device_ver</span> {
<span class="prelude-val">Some</span>(<span class="ident">dv</span>) <span class="op">=></span> {
<span class="kw">if</span> <span class="ident">dv</span> <span class="op">>=</span> [<span class="number">1</span>, <span class="number">2</span>].<span class="ident">into</span>() {
<span class="kw">match</span> <span class="ident">fill_event</span> {
<span class="prelude-val">Some</span>(<span class="ident">enew</span>) <span class="op">=></span> <span class="ident">buf</span>.<span class="ident">cmd</span>().<span class="ident">fill</span>(<span class="ident">val</span>, <span class="prelude-val">None</span>).<span class="ident">enew</span>(<span class="ident">enew</span>).<span class="ident">enq</span>()<span class="question-mark">?</span>,
<span class="prelude-val">None</span> <span class="op">=></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">new_event</span> <span class="op">=</span> <span class="ident">Event</span>::<span class="ident">empty</span>();
<span class="ident">buf</span>.<span class="ident">cmd</span>().<span class="ident">fill</span>(<span class="ident">val</span>, <span class="prelude-val">None</span>).<span class="ident">enew</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">new_event</span>).<span class="ident">enq</span>()<span class="question-mark">?</span>;
<span class="ident">new_event</span>.<span class="ident">wait_for</span>()<span class="question-mark">?</span>;
}
}
} <span class="kw">else</span> {
<span class="kw">let</span> <span class="ident">fill_vec</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">val</span>; <span class="ident">buf</span>.<span class="ident">len</span>()];
<span class="kw">match</span> <span class="ident">fill_event</span> {
<span class="prelude-val">Some</span>(<span class="ident">enew</span>) <span class="op">=></span> <span class="ident">buf</span>.<span class="ident">cmd</span>().<span class="ident">write</span>(<span class="kw-2">&</span><span class="ident">fill_vec</span>).<span class="ident">enew</span>(<span class="ident">enew</span>).<span class="ident">enq</span>()<span class="question-mark">?</span>,
<span class="prelude-val">None</span> <span class="op">=></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">new_event</span> <span class="op">=</span> <span class="ident">Event</span>::<span class="ident">empty</span>();
<span class="ident">buf</span>.<span class="ident">cmd</span>().<span class="ident">write</span>(<span class="kw-2">&</span><span class="ident">fill_vec</span>).<span class="ident">enew</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">new_event</span>).<span class="ident">enq</span>()<span class="question-mark">?</span>;
<span class="ident">new_event</span>.<span class="ident">wait_for</span>()<span class="question-mark">?</span>;
}
}
}
},
<span class="prelude-val">None</span> <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"ocl::BufferBuilder::build: A queue must be specified \
for this builder with `::queue` when using `::fill_val`."</span>),
}
}
<span class="prelude-val">Ok</span>(<span class="ident">buf</span>)
}
}
</pre>
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