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    //! Rust bindings for the OpenCL ABI.
    //!
    //! Supports OpenCL versions 1.1+ (1.0 not supported).
    //!
    //! This file was originally adapted from
    //! [https://www.khronos.org/registry/cl/api/1.1/cl.h](https://www.khronos.org/registry/cl/api/1.1/cl.h)
    //! and will continue to be updated with additions to newer versions of that
    //! document.
    //!
    //! The layout and format of this document are meant to mimic the original
    //! source in order to ease maintenance (as loatheful as that style may be).
    //!
    //!

    #![allow(non_camel_case_types, dead_code, unused_variables, improper_ctypes, non_upper_case_globals)]

    // use std::fmt::{Display, Formatter, Result};
    use libc::{c_void, size_t, c_char, c_uchar, intptr_t};

    pub type cl_platform_id     = *mut c_void;
    pub type cl_device_id       = *mut c_void;
    pub type cl_context         = *mut c_void;
    pub type cl_command_queue   = *mut c_void;
    pub type cl_mem             = *mut c_void;
    pub type cl_program         = *mut c_void;
    pub type cl_kernel          = *mut c_void;
    pub type cl_event           = *mut c_void;
    pub type cl_sampler         = *mut c_void;

    pub type cl_char                            = i8;
    pub type cl_uchar                           = u8;
    pub type cl_short                           = i16;
    pub type cl_ushort                          = u16;
    pub type cl_int                             = i32;
    pub type cl_uint                            = u32;
    pub type cl_long                            = i64;
    pub type cl_ulong                           = u64;
    pub type cl_half                            = u16;
    pub type cl_float                           = f32;
    pub type cl_double                          = f64;
    pub type cl_bool                            = cl_uint;
    pub type cl_bitfield                        = cl_ulong;
    pub type cl_device_type                     = cl_bitfield;
    pub type cl_platform_info                   = cl_uint;
    pub type cl_device_info                     = cl_uint;
    pub type cl_device_fp_config                = cl_bitfield;
    pub type cl_device_mem_cache_type           = cl_uint;
    pub type cl_device_local_mem_type           = cl_uint;
    pub type cl_device_exec_capabilities        = cl_bitfield;
    pub type cl_device_svm_capabilities         = cl_bitfield;
    pub type cl_command_queue_properties        = cl_bitfield;
    pub type cl_device_partition_property       = intptr_t;
    pub type cl_device_affinity_domain          = cl_bitfield;
    pub type cl_context_properties              = intptr_t;
    pub type cl_context_info                    = cl_uint;
    pub type cl_queue_properties                = cl_bitfield;
    pub type cl_command_queue_info              = cl_uint;
    pub type cl_channel_order                   = cl_uint;
    pub type cl_channel_type                    = cl_uint;
    pub type cl_mem_flags                       = cl_bitfield;
    pub type cl_svm_mem_flags                   = cl_bitfield;
    pub type cl_mem_object_type                 = cl_uint;
    pub type cl_mem_info                        = cl_uint;
    pub type cl_mem_migration_flags             = cl_bitfield;
    pub type cl_image_info                      = cl_uint;
    pub type cl_buffer_create_type              = cl_uint;
    pub type cl_addressing_mode                 = cl_uint;
    pub type cl_filter_mode                     = cl_uint;
    pub type cl_sampler_info                    = cl_uint;
    pub type cl_map_flags                       = cl_bitfield;
    pub type cl_pipe_properties                 = intptr_t;
    pub type cl_pipe_info                       = cl_uint;
    pub type cl_program_info                    = cl_uint;
    pub type cl_program_build_info              = cl_uint;
    pub type cl_program_binary_type             = cl_uint;
    pub type cl_build_status                    = cl_int;
    pub type cl_kernel_info                     = cl_uint;
    pub type cl_kernel_arg_info                 = cl_uint;
    pub type cl_kernel_arg_address_qualifier    = cl_uint;
    pub type cl_kernel_arg_access_qualifier     = cl_uint;
    pub type cl_kernel_arg_type_qualifier       = cl_uint;
    pub type cl_kernel_work_group_info          = cl_uint;
    pub type cl_kernel_sub_group_info           = cl_uint;
    pub type cl_event_info                      = cl_uint;
    pub type cl_command_type                    = cl_uint;
    pub type cl_profiling_info                  = cl_uint;
    pub type cl_sampler_properties              = cl_bitfield;
    pub type cl_kernel_exec_info                = cl_uint;

    #[repr(C)]
    pub struct cl_image_format {
        pub image_channel_order:        cl_channel_order,
        pub image_channel_data_type:    cl_channel_type,
    }

    #[repr(C)]
    pub struct cl_image_desc {
        pub image_type:         cl_mem_object_type,
        pub image_width:        size_t,
        pub image_height:       size_t,
        pub image_depth:        size_t,
        pub image_array_size:   size_t,
        pub image_row_pitch:    size_t,
        pub image_slice_pitch:  size_t,
        pub num_mip_levels:     cl_uint,
        pub num_samples:        cl_uint,
        // AKA `mem_object` in 2.0+
        pub buffer:             cl_mem,
    }

    #[repr(C)]
    pub struct cl_buffer_region {
        pub origin:     size_t,
        pub size:       size_t,
    }

    // Error Codes:
    pub const CL_SUCCESS:                                      cl_int = 0;
    pub const CL_DEVICE_NOT_FOUND:                             cl_int = -1;
    pub const CL_DEVICE_NOT_AVAILABLE:                         cl_int = -2;
    pub const CL_COMPILER_NOT_AVAILABLE:                       cl_int = -3;
    pub const CL_MEM_OBJECT_ALLOCATION_FAILURE:                cl_int = -4;
    pub const CL_OUT_OF_RESOURCES:                             cl_int = -5;
    pub const CL_OUT_OF_HOST_MEMORY:                           cl_int = -6;
    pub const CL_PROFILING_INFO_NOT_AVAILABLE:                 cl_int = -7;
    pub const CL_MEM_COPY_OVERLAP:                             cl_int = -8;
    pub const CL_IMAGE_FORMAT_MISMATCH:                        cl_int = -9;
    pub const CL_IMAGE_FORMAT_NOT_SUPPORTED:                   cl_int = -10;
    pub const CL_BUILD_PROGRAM_FAILURE:                        cl_int = -11;
    pub const CL_MAP_FAILURE:                                  cl_int = -12;
    pub const CL_MISALIGNED_SUB_BUFFER_OFFSET:                 cl_int = -13;
    pub const CL_EXEC_STATUS_ERROR_FOR_EVENTS_IN_WAIT_LIST:    cl_int = -14;
    pub const CL_COMPILE_PROGRAM_FAILURE:                      cl_int = -15;
    pub const CL_LINKER_NOT_AVAILABLE:                         cl_int = -16;
    pub const CL_LINK_PROGRAM_FAILURE:                         cl_int = -17;
    pub const CL_DEVICE_PARTITION_FAILED:                      cl_int = -18;
    pub const CL_KERNEL_ARG_INFO_NOT_AVAILABLE:                cl_int = -19;

    pub const CL_INVALID_VALUE:                                cl_int = -30;
    pub const CL_INVALID_DEVICE_TYPE:                          cl_int = -31;
    pub const CL_INVALID_PLATFORM:                             cl_int = -32;
    pub const CL_INVALID_DEVICE:                               cl_int = -33;
    pub const CL_INVALID_CONTEXT:                              cl_int = -34;
    pub const CL_INVALID_QUEUE_PROPERTIES:                     cl_int = -35;
    pub const CL_INVALID_COMMAND_QUEUE:                        cl_int = -36;
    pub const CL_INVALID_HOST_PTR:                             cl_int = -37;
    pub const CL_INVALID_MEM_OBJECT:                           cl_int = -38;
    pub const CL_INVALID_IMAGE_FORMAT_DESCRIPTOR:              cl_int = -39;
    pub const CL_INVALID_IMAGE_SIZE:                           cl_int = -40;
    pub const CL_INVALID_SAMPLER:                              cl_int = -41;
    pub const CL_INVALID_BINARY:                               cl_int = -42;
    pub const CL_INVALID_BUILD_OPTIONS:                        cl_int = -43;
    pub const CL_INVALID_PROGRAM:                              cl_int = -44;
    pub const CL_INVALID_PROGRAM_EXECUTABLE:                   cl_int = -45;
    pub const CL_INVALID_KERNEL_NAME:                          cl_int = -46;
    pub const CL_INVALID_KERNEL_DEFINITION:                    cl_int = -47;
    pub const CL_INVALID_KERNEL:                               cl_int = -48;
    pub const CL_INVALID_ARG_INDEX:                            cl_int = -49;
    pub const CL_INVALID_ARG_VALUE:                            cl_int = -50;
    pub const CL_INVALID_ARG_SIZE:                             cl_int = -51;
    pub const CL_INVALID_KERNEL_ARGS:                          cl_int = -52;
    pub const CL_INVALID_WORK_DIMENSION:                       cl_int = -53;
    pub const CL_INVALID_WORK_GROUP_SIZE:                      cl_int = -54;
    pub const CL_INVALID_WORK_ITEM_SIZE:                       cl_int = -55;
    pub const CL_INVALID_GLOBAL_OFFSET:                        cl_int = -56;
    pub const CL_INVALID_EVENT_WAIT_LIST:                      cl_int = -57;
    pub const CL_INVALID_EVENT:                                cl_int = -58;
    pub const CL_INVALID_OPERATION:                            cl_int = -59;
    pub const CL_INVALID_GL_OBJECT:                            cl_int = -60;
    pub const CL_INVALID_BUFFER_SIZE:                          cl_int = -61;
    pub const CL_INVALID_MIP_LEVEL:                            cl_int = -62;
    pub const CL_INVALID_GLOBAL_WORK_SIZE:                     cl_int = -63;
    pub const CL_INVALID_PROPERTY:                             cl_int = -64;
    pub const CL_INVALID_IMAGE_DESCRIPTOR:                     cl_int = -65;
    pub const CL_INVALID_COMPILER_OPTIONS:                     cl_int = -66;
    pub const CL_INVALID_LINKER_OPTIONS:                       cl_int = -67;
    pub const CL_INVALID_DEVICE_PARTITION_COUNT:               cl_int = -68;
    pub const CL_INVALID_PIPE_SIZE:                            cl_int = -69;
    pub const CL_INVALID_DEVICE_QUEUE:                         cl_int = -70;
    pub const CL_PLATFORM_NOT_FOUND_KHR:                       cl_int = -1001;

    // Version:
    pub const CL_VERSION_1_0:                               cl_bool = 1;
    pub const CL_VERSION_1_1:                               cl_bool = 1;
    pub const CL_VERSION_1_2:                               cl_bool = 1;
    pub const CL_VERSION_2_0:                               cl_bool = 1;
    pub const CL_VERSION_2_1:                               cl_bool = 1;

    // cl_bool:
    pub const CL_FALSE:                                     cl_bool = 0;
    pub const CL_TRUE:                                      cl_bool = 1;
    pub const CL_BLOCKING:                                  cl_bool = CL_TRUE;
    pub const CL_NON_BLOCKING:                              cl_bool = CL_FALSE;

    // cl_platform_info:
    pub const CL_PLATFORM_PROFILE:                          cl_uint = 0x0900;
    pub const CL_PLATFORM_VERSION:                          cl_uint = 0x0901;
    pub const CL_PLATFORM_NAME:                             cl_uint = 0x0902;
    pub const CL_PLATFORM_VENDOR:                           cl_uint = 0x0903;
    pub const CL_PLATFORM_EXTENSIONS:                       cl_uint = 0x0904;
        //###### NEW ########
        pub const CL_PLATFORM_HOST_TIMER_RESOLUTION:            cl_uint = 0x0905;

    // cl_device_type - bitfield:
    pub const CL_DEVICE_TYPE_DEFAULT:                      cl_bitfield = 1 << 0;
    pub const CL_DEVICE_TYPE_CPU:                          cl_bitfield = 1 << 1;
    pub const CL_DEVICE_TYPE_GPU:                          cl_bitfield = 1 << 2;
    pub const CL_DEVICE_TYPE_ACCELERATOR:                  cl_bitfield = 1 << 3;
    pub const CL_DEVICE_TYPE_CUSTOM:                       cl_bitfield = 1 << 4;
    pub const CL_DEVICE_TYPE_ALL:                          cl_bitfield = 0xFFFFFFFF;

    // cl_device_info:
    pub const CL_DEVICE_TYPE:                                   cl_uint = 0x1000;
    pub const CL_DEVICE_VENDOR_ID:                              cl_uint = 0x1001;
    pub const CL_DEVICE_MAX_COMPUTE_UNITS:                      cl_uint = 0x1002;
    pub const CL_DEVICE_MAX_WORK_ITEM_DIMENSIONS:               cl_uint = 0x1003;
    pub const CL_DEVICE_MAX_WORK_GROUP_SIZE:                    cl_uint = 0x1004;
    pub const CL_DEVICE_MAX_WORK_ITEM_SIZES:                    cl_uint = 0x1005;
    pub const CL_DEVICE_PREFERRED_VECTOR_WIDTH_CHAR:            cl_uint = 0x1006;
    pub const CL_DEVICE_PREFERRED_VECTOR_WIDTH_SHORT:           cl_uint = 0x1007;
    pub const CL_DEVICE_PREFERRED_VECTOR_WIDTH_INT:             cl_uint = 0x1008;
    pub const CL_DEVICE_PREFERRED_VECTOR_WIDTH_LONG:            cl_uint = 0x1009;
    pub const CL_DEVICE_PREFERRED_VECTOR_WIDTH_FLOAT:           cl_uint = 0x100A;
    pub const CL_DEVICE_PREFERRED_VECTOR_WIDTH_DOUBLE:          cl_uint = 0x100B;
    pub const CL_DEVICE_MAX_CLOCK_FREQUENCY:                    cl_uint = 0x100C;
    pub const CL_DEVICE_ADDRESS_BITS:                           cl_uint = 0x100D;
    pub const CL_DEVICE_MAX_READ_IMAGE_ARGS:                    cl_uint = 0x100E;
    pub const CL_DEVICE_MAX_WRITE_IMAGE_ARGS:                   cl_uint = 0x100F;
    pub const CL_DEVICE_MAX_MEM_ALLOC_SIZE:                     cl_uint = 0x1010;
    pub const CL_DEVICE_IMAGE2D_MAX_WIDTH:                      cl_uint = 0x1011;
    pub const CL_DEVICE_IMAGE2D_MAX_HEIGHT:                     cl_uint = 0x1012;
    pub const CL_DEVICE_IMAGE3D_MAX_WIDTH:                      cl_uint = 0x1013;
    pub const CL_DEVICE_IMAGE3D_MAX_HEIGHT:                     cl_uint = 0x1014;
    pub const CL_DEVICE_IMAGE3D_MAX_DEPTH:                      cl_uint = 0x1015;
    pub const CL_DEVICE_IMAGE_SUPPORT:                          cl_uint = 0x1016;
    pub const CL_DEVICE_MAX_PARAMETER_SIZE:                     cl_uint = 0x1017;
    pub const CL_DEVICE_MAX_SAMPLERS:                           cl_uint = 0x1018;
    pub const CL_DEVICE_MEM_BASE_ADDR_ALIGN:                    cl_uint = 0x1019;
    pub const CL_DEVICE_MIN_DATA_TYPE_ALIGN_SIZE:               cl_uint = 0x101A;
    pub const CL_DEVICE_SINGLE_FP_CONFIG:                       cl_uint = 0x101B;
    pub const CL_DEVICE_GLOBAL_MEM_CACHE_TYPE:                  cl_uint = 0x101C;
    pub const CL_DEVICE_GLOBAL_MEM_CACHELINE_SIZE:              cl_uint = 0x101D;
    pub const CL_DEVICE_GLOBAL_MEM_CACHE_SIZE:                  cl_uint = 0x101E;
    pub const CL_DEVICE_GLOBAL_MEM_SIZE:                        cl_uint = 0x101F;
    pub const CL_DEVICE_MAX_CONSTANT_BUFFER_SIZE:               cl_uint = 0x1020;
    pub const CL_DEVICE_MAX_CONSTANT_ARGS:                      cl_uint = 0x1021;
    pub const CL_DEVICE_LOCAL_MEM_TYPE:                         cl_uint = 0x1022;
    pub const CL_DEVICE_LOCAL_MEM_SIZE:                         cl_uint = 0x1023;
    pub const CL_DEVICE_ERROR_CORRECTION_SUPPORT:               cl_uint = 0x1024;
    pub const CL_DEVICE_PROFILING_TIMER_RESOLUTION:             cl_uint = 0x1025;
    pub const CL_DEVICE_ENDIAN_LITTLE:                          cl_uint = 0x1026;
    pub const CL_DEVICE_AVAILABLE:                              cl_uint = 0x1027;
    pub const CL_DEVICE_COMPILER_AVAILABLE:                     cl_uint = 0x1028;
    pub const CL_DEVICE_EXECUTION_CAPABILITIES:                 cl_uint = 0x1029;
    // DEPRICATED 2.0:
    pub const CL_DEVICE_QUEUE_PROPERTIES:                       cl_uint = 0x102A;
    pub const CL_DEVICE_QUEUE_ON_HOST_PROPERTIES:               cl_uint = 0x102A;
    pub const CL_DEVICE_NAME:                                   cl_uint = 0x102B;
    pub const CL_DEVICE_VENDOR:                                 cl_uint = 0x102C;
    pub const CL_DRIVER_VERSION:                                cl_uint = 0x102D;
    pub const CL_DEVICE_PROFILE:                                cl_uint = 0x102E;
    pub const CL_DEVICE_VERSION:                                cl_uint = 0x102F;
    pub const CL_DEVICE_EXTENSIONS:                             cl_uint = 0x1030;
    pub const CL_DEVICE_PLATFORM:                               cl_uint = 0x1031;
    pub const CL_DEVICE_DOUBLE_FP_CONFIG:                       cl_uint = 0x1032;
    pub const CL_DEVICE_HALF_FP_CONFIG:                         cl_uint = 0x1033;
    pub const CL_DEVICE_PREFERRED_VECTOR_WIDTH_HALF:            cl_uint = 0x1034;
    // DEPRICATED 2.0:
    pub const CL_DEVICE_HOST_UNIFIED_MEMORY:                    cl_uint = 0x1035;
    pub const CL_DEVICE_NATIVE_VECTOR_WIDTH_CHAR:               cl_uint = 0x1036;
    pub const CL_DEVICE_NATIVE_VECTOR_WIDTH_SHORT:              cl_uint = 0x1037;
    pub const CL_DEVICE_NATIVE_VECTOR_WIDTH_INT:                cl_uint = 0x1038;
    pub const CL_DEVICE_NATIVE_VECTOR_WIDTH_LONG:               cl_uint = 0x1039;
    pub const CL_DEVICE_NATIVE_VECTOR_WIDTH_FLOAT:              cl_uint = 0x103A;
    pub const CL_DEVICE_NATIVE_VECTOR_WIDTH_DOUBLE:             cl_uint = 0x103B;
    pub const CL_DEVICE_NATIVE_VECTOR_WIDTH_HALF:               cl_uint = 0x103C;
    pub const CL_DEVICE_OPENCL_C_VERSION:                       cl_uint = 0x103D;
    pub const CL_DEVICE_LINKER_AVAILABLE:                       cl_uint = 0x103E;
    pub const CL_DEVICE_BUILT_IN_KERNELS:                       cl_uint = 0x103F;
    pub const CL_DEVICE_IMAGE_MAX_BUFFER_SIZE:                  cl_uint = 0x1040;
    pub const CL_DEVICE_IMAGE_MAX_ARRAY_SIZE:                   cl_uint = 0x1041;
    pub const CL_DEVICE_PARENT_DEVICE:                          cl_uint = 0x1042;
    pub const CL_DEVICE_PARTITION_MAX_SUB_DEVICES:              cl_uint = 0x1043;
    pub const CL_DEVICE_PARTITION_PROPERTIES:                   cl_uint = 0x1044;
    pub const CL_DEVICE_PARTITION_AFFINITY_DOMAIN:              cl_uint = 0x1045;
    pub const CL_DEVICE_PARTITION_TYPE:                         cl_uint = 0x1046;
    pub const CL_DEVICE_REFERENCE_COUNT:                        cl_uint = 0x1047;
    pub const CL_DEVICE_PREFERRED_INTEROP_USER_SYNC:            cl_uint = 0x1048;
    pub const CL_DEVICE_PRINTF_BUFFER_SIZE:                     cl_uint = 0x1049;
    pub const CL_DEVICE_IMAGE_PITCH_ALIGNMENT:                  cl_uint = 0x104A;
    pub const CL_DEVICE_IMAGE_BASE_ADDRESS_ALIGNMENT:           cl_uint = 0x104B;
        //###### NEW ########
        pub const CL_DEVICE_MAX_READ_WRITE_IMAGE_ARGS:              cl_uint = 0x104C;
        pub const CL_DEVICE_MAX_GLOBAL_VARIABLE_SIZE:               cl_uint = 0x104D;
        pub const CL_DEVICE_QUEUE_ON_DEVICE_PROPERTIES:             cl_uint = 0x104E;
        pub const CL_DEVICE_QUEUE_ON_DEVICE_PREFERRED_SIZE:         cl_uint = 0x104F;
        pub const CL_DEVICE_QUEUE_ON_DEVICE_MAX_SIZE:               cl_uint = 0x1050;
        pub const CL_DEVICE_MAX_ON_DEVICE_QUEUES:                   cl_uint = 0x1051;
        pub const CL_DEVICE_MAX_ON_DEVICE_EVENTS:                   cl_uint = 0x1052;
        pub const CL_DEVICE_SVM_CAPABILITIES:                       cl_uint = 0x1053;
        pub const CL_DEVICE_GLOBAL_VARIABLE_PREFERRED_TOTAL_SIZE:   cl_uint = 0x1054;
        pub const CL_DEVICE_MAX_PIPE_ARGS:                          cl_uint = 0x1055;
        pub const CL_DEVICE_PIPE_MAX_ACTIVE_RESERVATIONS:           cl_uint = 0x1056;
        pub const CL_DEVICE_PIPE_MAX_PACKET_SIZE:                   cl_uint = 0x1057;
        pub const CL_DEVICE_PREFERRED_PLATFORM_ATOMIC_ALIGNMENT:    cl_uint = 0x1058;
        pub const CL_DEVICE_PREFERRED_GLOBAL_ATOMIC_ALIGNMENT:      cl_uint = 0x1059;
        pub const CL_DEVICE_PREFERRED_LOCAL_ATOMIC_ALIGNMENT:       cl_uint = 0x105A;
        pub const CL_DEVICE_IL_VERSION:                             cl_uint = 0x105B;
        pub const CL_DEVICE_MAX_NUM_SUB_GROUPS:                     cl_uint = 0x105C;
        pub const CL_DEVICE_SUB_GROUP_INDEPENDENT_FORWARD_PROGRESS: cl_uint = 0x105D;

    // cl_device_fp_config - bitfield:
    pub const CL_FP_DENORM:                                 cl_bitfield = 1 << 0;
    pub const CL_FP_INF_NAN:                                cl_bitfield = 1 << 1;
    pub const CL_FP_ROUND_TO_NEAREST:                       cl_bitfield = 1 << 2;
    pub const CL_FP_ROUND_TO_ZERO:                          cl_bitfield = 1 << 3;
    pub const CL_FP_ROUND_TO_INF:                           cl_bitfield = 1 << 4;
    pub const CL_FP_FMA:                                    cl_bitfield = 1 << 5;
    pub const CL_FP_SOFT_FLOAT:                             cl_bitfield = 1 << 6;
    pub const CL_FP_CORRECTLY_ROUNDED_DIVIDE_SQRT:          cl_bitfield = 1 << 7;

    // cl_device_mem_cache_type:
    pub const CL_NONE:                                      cl_uint = 0x0;
    pub const CL_READ_ONLY_CACHE:                           cl_uint = 0x1;
    pub const CL_READ_WRITE_CACHE:                          cl_uint = 0x2;

    // cl_device_local_mem_type:
    pub const CL_LOCAL:                                     cl_uint = 0x1;
    pub const CL_GLOBAL:                                    cl_uint = 0x2;

    // cl_device_exec_capabilities - bitfield:
    pub const CL_EXEC_KERNEL:                               cl_bitfield = 1 << 0;
    pub const CL_EXEC_NATIVE_KERNEL:                        cl_bitfield = 1 << 1;

    // cl_command_queue_properties - bitfield:
    pub const CL_QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE:       cl_bitfield = 1 << 0;
    pub const CL_QUEUE_PROFILING_ENABLE:                    cl_bitfield = 1 << 1;
        //###### NEW ########
        pub const CL_QUEUE_ON_DEVICE:                           cl_bitfield = 1 << 2;
        pub const CL_QUEUE_ON_DEVICE_DEFAULT:                   cl_bitfield = 1 << 3;

    // cl_context_info:
    pub const CL_CONTEXT_REFERENCE_COUNT:                   cl_uint = 0x1080;
    pub const CL_CONTEXT_DEVICES:                           cl_uint = 0x1081;
    pub const CL_CONTEXT_PROPERTIES:                        cl_uint = 0x1082;
    pub const CL_CONTEXT_NUM_DEVICES:                       cl_uint = 0x1083;

    // cl_context_info + cl_context_properties:
    pub const CL_CONTEXT_PLATFORM:                          cl_uint = 0x1084;
    pub const CL_CONTEXT_INTEROP_USER_SYNC:                 cl_uint = 0x1085;

    // cl_device_partition_property:
    pub const CL_DEVICE_PARTITION_EQUALLY:                  cl_uint = 0x1086;
    pub const CL_DEVICE_PARTITION_BY_COUNTS:                cl_uint = 0x1087;
    pub const CL_DEVICE_PARTITION_BY_COUNTS_LIST_END:       cl_uint = 0x0;
    pub const CL_DEVICE_PARTITION_BY_AFFINITY_DOMAIN:       cl_uint = 0x1088;

    // cl_device_affinity_domain:
    pub const CL_DEVICE_AFFINITY_DOMAIN_NUMA:               cl_bitfield = 1 << 0;
    pub const CL_DEVICE_AFFINITY_DOMAIN_L4_CACHE:           cl_bitfield = 1 << 1;
    pub const CL_DEVICE_AFFINITY_DOMAIN_L3_CACHE:           cl_bitfield = 1 << 2;
    pub const CL_DEVICE_AFFINITY_DOMAIN_L2_CACHE:           cl_bitfield = 1 << 3;
    pub const CL_DEVICE_AFFINITY_DOMAIN_L1_CACHE:           cl_bitfield = 1 << 4;
    pub const CL_DEVICE_AFFINITY_DOMAIN_NEXT_PARTITIONABLE: cl_bitfield = 1 << 5;

        //###### NEW ########
        // cl_device_svm_capabilities:
        pub const CL_DEVICE_SVM_COARSE_GRAIN_BUFFER:           cl_bitfield = 1 << 0;
        pub const CL_DEVICE_SVM_FINE_GRAIN_BUFFER:             cl_bitfield = 1 << 1;
        pub const CL_DEVICE_SVM_FINE_GRAIN_SYSTEM:             cl_bitfield = 1 << 2;
        pub const CL_DEVICE_SVM_ATOMICS:                       cl_bitfield = 1 << 3;

    // cl_command_queue_info:
    pub const CL_QUEUE_CONTEXT:                             cl_uint = 0x1090;
    pub const CL_QUEUE_DEVICE:                              cl_uint = 0x1091;
    pub const CL_QUEUE_REFERENCE_COUNT:                     cl_uint = 0x1092;
    pub const CL_QUEUE_PROPERTIES:                          cl_uint = 0x1093;
        //###### NEW ########
        pub const CL_QUEUE_SIZE:                                cl_uint = 0x1094;
        pub const CL_QUEUE_DEVICE_DEFAULT:                      cl_uint = 0x1095;

    // cl_mem_flags and cl_svm_mem_flags - bitfield:
    pub const CL_MEM_READ_WRITE:                            cl_bitfield = 1 << 0;
    pub const CL_MEM_WRITE_ONLY:                            cl_bitfield = 1 << 1;
    pub const CL_MEM_READ_ONLY:                             cl_bitfield = 1 << 2;
    pub const CL_MEM_USE_HOST_PTR:                          cl_bitfield = 1 << 3;
    pub const CL_MEM_ALLOC_HOST_PTR:                        cl_bitfield = 1 << 4;
    pub const CL_MEM_COPY_HOST_PTR:                         cl_bitfield = 1 << 5;
    // RESERVED                                             cl_bitfield = 1 << 6;
    pub const CL_MEM_HOST_WRITE_ONLY:                       cl_bitfield = 1 << 7;
    pub const CL_MEM_HOST_READ_ONLY:                        cl_bitfield = 1 << 8;
    pub const CL_MEM_HOST_NO_ACCESS:                        cl_bitfield = 1 << 9;
        //###### NEW ########
        pub const CL_MEM_SVM_FINE_GRAIN_BUFFER:                 cl_bitfield = 1 << 10;   // used by cl_svm_mem_flags only
        pub const CL_MEM_SVM_ATOMICS:                           cl_bitfield = 1 << 11;   // used by cl_svm_mem_flags only
        pub const CL_MEM_KERNEL_READ_AND_WRITE:                 cl_bitfield = 1 << 12;

    // cl_mem_migration_flags - bitfield:
    pub const CL_MIGRATE_MEM_OBJECT_HOST:                   cl_bitfield = 1 << 0;
    pub const CL_MIGRATE_MEM_OBJECT_CONTENT_UNDEFINED:      cl_bitfield = 1 << 1;

    // cl_channel_order:
    pub const CL_R:                                         cl_uint = 0x10B0;
    pub const CL_A:                                         cl_uint = 0x10B1;
    pub const CL_RG:                                        cl_uint = 0x10B2;
    pub const CL_RA:                                        cl_uint = 0x10B3;
    pub const CL_RGB:                                       cl_uint = 0x10B4;
    pub const CL_RGBA:                                      cl_uint = 0x10B5;
    pub const CL_BGRA:                                      cl_uint = 0x10B6;
    pub const CL_ARGB:                                      cl_uint = 0x10B7;
    pub const CL_INTENSITY:                                 cl_uint = 0x10B8;
    pub const CL_LUMINANCE:                                 cl_uint = 0x10B9;
    pub const CL_Rx:                                        cl_uint = 0x10BA;
    pub const CL_RGx:                                       cl_uint = 0x10BB;
    pub const CL_RGBx:                                      cl_uint = 0x10BC;
    pub const CL_DEPTH:                                     cl_uint = 0x10BD;
    pub const CL_DEPTH_STENCIL:                             cl_uint = 0x10BE;
        //###### NEW ########
        pub const CL_sRGB:                                      cl_uint = 0x10BF;
        pub const CL_sRGBx:                                     cl_uint = 0x10C0;
        pub const CL_sRGBA:                                     cl_uint = 0x10C1;
        pub const CL_sBGRA:                                     cl_uint = 0x10C2;
        pub const CL_ABGR:                                      cl_uint = 0x10C3;

    // cl_channel_type:
    pub const CL_SNORM_INT8:                                cl_uint = 0x10D0;
    pub const CL_SNORM_INT16:                               cl_uint = 0x10D1;
    pub const CL_UNORM_INT8:                                cl_uint = 0x10D2;
    pub const CL_UNORM_INT16:                               cl_uint = 0x10D3;
    pub const CL_UNORM_SHORT_565:                           cl_uint = 0x10D4;
    pub const CL_UNORM_SHORT_555:                           cl_uint = 0x10D5;
    pub const CL_UNORM_INT_101010:                          cl_uint = 0x10D6;
    pub const CL_SIGNED_INT8:                               cl_uint = 0x10D7;
    pub const CL_SIGNED_INT16:                              cl_uint = 0x10D8;
    pub const CL_SIGNED_INT32:                              cl_uint = 0x10D9;
    pub const CL_UNSIGNED_INT8:                             cl_uint = 0x10DA;
    pub const CL_UNSIGNED_INT16:                            cl_uint = 0x10DB;
    pub const CL_UNSIGNED_INT32:                            cl_uint = 0x10DC;
    pub const CL_HALF_FLOAT:                                cl_uint = 0x10DD;
    pub const CL_FLOAT:                                     cl_uint = 0x10DE;
    pub const CL_UNORM_INT24:                               cl_uint = 0x10DF;
        //###### NEW ########
        pub const CL_UNORM_INT_101010_2:                        cl_uint = 0x10E0;

    // cl_mem_object_type:
    pub const CL_MEM_OBJECT_BUFFER:                         cl_uint = 0x10F0;
    pub const CL_MEM_OBJECT_IMAGE2D:                        cl_uint = 0x10F1;
    pub const CL_MEM_OBJECT_IMAGE3D:                        cl_uint = 0x10F2;
    pub const CL_MEM_OBJECT_IMAGE2D_ARRAY:                  cl_uint = 0x10F3;
    pub const CL_MEM_OBJECT_IMAGE1D:                        cl_uint = 0x10F4;
    pub const CL_MEM_OBJECT_IMAGE1D_ARRAY:                  cl_uint = 0x10F5;
    pub const CL_MEM_OBJECT_IMAGE1D_BUFFER:                 cl_uint = 0x10F6;
        //###### NEW ########
        pub const CL_MEM_OBJECT_PIPE:                           cl_uint = 0x10F7;

    // cl_mem_info:
    pub const CL_MEM_TYPE:                                  cl_uint = 0x1100;
    pub const CL_MEM_FLAGS:                                 cl_uint = 0x1101;
    pub const CL_MEM_SIZE:                                  cl_uint = 0x1102;
    pub const CL_MEM_HOST_PTR:                              cl_uint = 0x1103;
    pub const CL_MEM_MAP_COUNT:                             cl_uint = 0x1104;
    pub const CL_MEM_REFERENCE_COUNT:                       cl_uint = 0x1105;
    pub const CL_MEM_CONTEXT:                               cl_uint = 0x1106;
    pub const CL_MEM_ASSOCIATED_MEMOBJECT:                  cl_uint = 0x1107;
    pub const CL_MEM_OFFSET:                                cl_uint = 0x1108;
        //###### NEW ########
        pub const CL_MEM_USES_SVM_POINTER:                      cl_uint = 0x1109;

    // cl_image_info:
    pub const CL_IMAGE_FORMAT:                              cl_uint = 0x1110;
    pub const CL_IMAGE_ELEMENT_SIZE:                        cl_uint = 0x1111;
    pub const CL_IMAGE_ROW_PITCH:                           cl_uint = 0x1112;
    pub const CL_IMAGE_SLICE_PITCH:                         cl_uint = 0x1113;
    pub const CL_IMAGE_WIDTH:                               cl_uint = 0x1114;
    pub const CL_IMAGE_HEIGHT:                              cl_uint = 0x1115;
    pub const CL_IMAGE_DEPTH:                               cl_uint = 0x1116;
    pub const CL_IMAGE_ARRAY_SIZE:                          cl_uint = 0x1117;
    pub const CL_IMAGE_BUFFER:                              cl_uint = 0x1118;
    pub const CL_IMAGE_NUM_MIP_LEVELS:                      cl_uint = 0x1119;
    pub const CL_IMAGE_NUM_SAMPLES:                         cl_uint = 0x111A;

        //###### NEW ########
        // cl_pipe_info:
        pub const CL_PIPE_PACKET_SIZE:                         cl_uint = 0x1120;
        pub const CL_PIPE_MAX_PACKETS:                         cl_uint = 0x1121;

    // cl_addressing_mode:
    pub const CL_ADDRESS_NONE:                              cl_uint = 0x1130;
    pub const CL_ADDRESS_CLAMP_TO_EDGE:                     cl_uint = 0x1131;
    pub const CL_ADDRESS_CLAMP:                             cl_uint = 0x1132;
    pub const CL_ADDRESS_REPEAT:                            cl_uint = 0x1133;
    pub const CL_ADDRESS_MIRRORED_REPEAT:                   cl_uint = 0x1134;

    // cl_filter_mode:
    pub const CL_FILTER_NEAREST:                            cl_uint = 0x1140;
    pub const CL_FILTER_LINEAR:                             cl_uint = 0x1141;

    // cl_sampler_info:
    pub const CL_SAMPLER_REFERENCE_COUNT:                   cl_uint = 0x1150;
    pub const CL_SAMPLER_CONTEXT:                           cl_uint = 0x1151;
    pub const CL_SAMPLER_NORMALIZED_COORDS:                 cl_uint = 0x1152;
    pub const CL_SAMPLER_ADDRESSING_MODE:                   cl_uint = 0x1153;
    pub const CL_SAMPLER_FILTER_MODE:                       cl_uint = 0x1154;
        //###### NEW ########
        pub const CL_SAMPLER_MIP_FILTER_MODE:                   cl_uint = 0x1155;
        pub const CL_SAMPLER_LOD_MIN:                           cl_uint = 0x1156;
        pub const CL_SAMPLER_LOD_MAX:                           cl_uint = 0x1157;

    // cl_map_flags - bitfield:
    pub const CL_MAP_READ:                                  cl_bitfield = 1 << 0;
    pub const CL_MAP_WRITE:                                 cl_bitfield = 1 << 1;
    pub const CL_MAP_WRITE_INVALIDATE_REGION:               cl_bitfield = 1 << 2;

    // cl_program_info:
    pub const CL_PROGRAM_REFERENCE_COUNT:                   cl_uint = 0x1160;
    pub const CL_PROGRAM_CONTEXT:                           cl_uint = 0x1161;
    pub const CL_PROGRAM_NUM_DEVICES:                       cl_uint = 0x1162;
    pub const CL_PROGRAM_DEVICES:                           cl_uint = 0x1163;
    pub const CL_PROGRAM_SOURCE:                            cl_uint = 0x1164;
    pub const CL_PROGRAM_BINARY_SIZES:                      cl_uint = 0x1165;
    pub const CL_PROGRAM_BINARIES:                          cl_uint = 0x1166;
    pub const CL_PROGRAM_NUM_KERNELS:                       cl_uint = 0x1167;
    pub const CL_PROGRAM_KERNEL_NAMES:                      cl_uint = 0x1168;
        //###### NEW ########
        pub const CL_PROGRAM_IL:                                cl_uint = 0x1169;

    // cl_program_build_info:
    pub const CL_PROGRAM_BUILD_STATUS:                      cl_uint = 0x1181;
    pub const CL_PROGRAM_BUILD_OPTIONS:                     cl_uint = 0x1182;
    pub const CL_PROGRAM_BUILD_LOG:                         cl_uint = 0x1183;
    pub const CL_PROGRAM_BINARY_TYPE:                       cl_uint = 0x1184;
        //###### NEW ########
        pub const CL_PROGRAM_BUILD_GLOBAL_VARIABLE_TOTAL_SIZE:  cl_uint = 0x1185;

    // cl_program_binary_type:
    pub const CL_PROGRAM_BINARY_TYPE_NONE:                  cl_bitfield = 0x0;
    pub const CL_PROGRAM_BINARY_TYPE_COMPILED_OBJECT:       cl_bitfield = 0x1;
    pub const CL_PROGRAM_BINARY_TYPE_LIBRARY:               cl_bitfield = 0x2;
    pub const CL_PROGRAM_BINARY_TYPE_EXECUTABLE:            cl_bitfield = 0x4;

    // cl_build_status:
    pub const CL_BUILD_SUCCESS:                             cl_uint = 0;
    pub const CL_BUILD_NONE:                                cl_uint = !0 - 1;
    pub const CL_BUILD_ERROR:                               cl_uint = !0 - 2;
    pub const CL_BUILD_IN_PROGRESS:                         cl_uint = !0 - 3;

    // cl_kernel_info:
    pub const CL_KERNEL_FUNCTION_NAME:                      cl_uint = 0x1190;
    pub const CL_KERNEL_NUM_ARGS:                           cl_uint = 0x1191;
    pub const CL_KERNEL_REFERENCE_COUNT:                    cl_uint = 0x1192;
    pub const CL_KERNEL_CONTEXT:                            cl_uint = 0x1193;
    pub const CL_KERNEL_PROGRAM:                            cl_uint = 0x1194;
    pub const CL_KERNEL_ATTRIBUTES:                         cl_uint = 0x1195;
        //###### NEW ########
        pub const CL_KERNEL_MAX_NUM_SUB_GROUPS:                 cl_uint = 0x11B9;
        pub const CL_KERNEL_COMPILE_NUM_SUB_GROUPS:             cl_uint = 0x11BA;

    // cl_kernel_arg_info:
    pub const CL_KERNEL_ARG_ADDRESS_QUALIFIER:              cl_uint = 0x1196;
    pub const CL_KERNEL_ARG_ACCESS_QUALIFIER:               cl_uint = 0x1197;
    pub const CL_KERNEL_ARG_TYPE_NAME:                      cl_uint = 0x1198;
    pub const CL_KERNEL_ARG_TYPE_QUALIFIER:                 cl_uint = 0x1199;
    pub const CL_KERNEL_ARG_NAME:                           cl_uint = 0x119A;

    // cl_kernel_arg_address_qualifier:
    pub const CL_KERNEL_ARG_ADDRESS_GLOBAL:                 cl_uint = 0x119B;
    pub const CL_KERNEL_ARG_ADDRESS_LOCAL:                  cl_uint = 0x119C;
    pub const CL_KERNEL_ARG_ADDRESS_CONSTANT:               cl_uint = 0x119D;
    pub const CL_KERNEL_ARG_ADDRESS_PRIVATE:                cl_uint = 0x119E;

    // cl_kernel_arg_access_qualifier:
    pub const CL_KERNEL_ARG_ACCESS_READ_ONLY:               cl_uint = 0x11A0;
    pub const CL_KERNEL_ARG_ACCESS_WRITE_ONLY:              cl_uint = 0x11A1;
    pub const CL_KERNEL_ARG_ACCESS_READ_WRITE:              cl_uint = 0x11A2;
    pub const CL_KERNEL_ARG_ACCESS_NONE:                    cl_uint = 0x11A3;

    // cl_kernel_arg_type_qualifer:
    pub const CL_KERNEL_ARG_TYPE_NONE:                      cl_bitfield = 0;
    pub const CL_KERNEL_ARG_TYPE_CONST:                     cl_bitfield = 1 << 0;
    pub const CL_KERNEL_ARG_TYPE_RESTRICT:                  cl_bitfield = 1 << 1;
    pub const CL_KERNEL_ARG_TYPE_VOLATILE:                  cl_bitfield = 1 << 2;
        //###### NEW ########
        pub const CL_KERNEL_ARG_TYPE_PIPE:                      cl_bitfield = 1 << 3;

    // cl_kernel_work_group_info:
    pub const CL_KERNEL_WORK_GROUP_SIZE:                    cl_uint = 0x11B0;
    pub const CL_KERNEL_COMPILE_WORK_GROUP_SIZE:            cl_uint = 0x11B1;
    pub const CL_KERNEL_LOCAL_MEM_SIZE:                     cl_uint = 0x11B2;
    pub const CL_KERNEL_PREFERRED_WORK_GROUP_SIZE_MULTIPLE: cl_uint = 0x11B3;
    pub const CL_KERNEL_PRIVATE_MEM_SIZE:                   cl_uint = 0x11B4;
    pub const CL_KERNEL_GLOBAL_WORK_SIZE:                   cl_uint = 0x11B5;

        //###### NEW ########
        // cl_kernel_sub_group_info:
        pub const CL_KERNEL_MAX_SUB_GROUP_SIZE_FOR_NDRANGE:    cl_uint = 0x2033;
        pub const CL_KERNEL_SUB_GROUP_COUNT_FOR_NDRANGE:       cl_uint = 0x2034;
        pub const CL_KERNEL_LOCAL_SIZE_FOR_SUB_GROUP_COUNT:    cl_uint = 0x11B8;

        //###### NEW ########
        // cl_kernel_exec_info:
        pub const CL_KERNEL_EXEC_INFO_SVM_PTRS:                cl_uint = 0x11B6;
        pub const CL_KERNEL_EXEC_INFO_SVM_FINE_GRAIN_SYSTEM:   cl_uint = 0x11B7;

    // cl_event_info:
    pub const CL_EVENT_COMMAND_QUEUE:                       cl_uint = 0x11D0;
    pub const CL_EVENT_COMMAND_TYPE:                        cl_uint = 0x11D1;
    pub const CL_EVENT_REFERENCE_COUNT:                     cl_uint = 0x11D2;
    pub const CL_EVENT_COMMAND_EXECUTION_STATUS:            cl_uint = 0x11D3;
    pub const CL_EVENT_CONTEXT:                             cl_uint = 0x11D4;

    // cl_command_type:
    pub const CL_COMMAND_NDRANGE_KERNEL:                    cl_uint = 0x11F0;
    pub const CL_COMMAND_TASK:                              cl_uint = 0x11F1;
    pub const CL_COMMAND_NATIVE_KERNEL:                     cl_uint = 0x11F2;
    pub const CL_COMMAND_READ_BUFFER:                       cl_uint = 0x11F3;
    pub const CL_COMMAND_WRITE_BUFFER:                      cl_uint = 0x11F4;
    pub const CL_COMMAND_COPY_BUFFER:                       cl_uint = 0x11F5;
    pub const CL_COMMAND_READ_IMAGE:                        cl_uint = 0x11F6;
    pub const CL_COMMAND_WRITE_IMAGE:                       cl_uint = 0x11F7;
    pub const CL_COMMAND_COPY_IMAGE:                        cl_uint = 0x11F8;
    pub const CL_COMMAND_COPY_IMAGE_TO_BUFFER:              cl_uint = 0x11F9;
    pub const CL_COMMAND_COPY_BUFFER_TO_IMAGE:              cl_uint = 0x11FA;
    pub const CL_COMMAND_MAP_BUFFER:                        cl_uint = 0x11FB;
    pub const CL_COMMAND_MAP_IMAGE:                         cl_uint = 0x11FC;
    pub const CL_COMMAND_UNMAP_MEM_OBJECT:                  cl_uint = 0x11FD;
    pub const CL_COMMAND_MARKER:                            cl_uint = 0x11FE;
    pub const CL_COMMAND_ACQUIRE_GL_OBJECTS:                cl_uint = 0x11FF;
    pub const CL_COMMAND_RELEASE_GL_OBJECTS:                cl_uint = 0x1200;
    pub const CL_COMMAND_READ_BUFFER_RECT:                  cl_uint = 0x1201;
    pub const CL_COMMAND_WRITE_BUFFER_RECT:                 cl_uint = 0x1202;
    pub const CL_COMMAND_COPY_BUFFER_RECT:                  cl_uint = 0x1203;
    pub const CL_COMMAND_USER:                              cl_uint = 0x1204;
    pub const CL_COMMAND_BARRIER:                           cl_uint = 0x1205;
    pub const CL_COMMAND_MIGRATE_MEM_OBJECTS:               cl_uint = 0x1206;
    pub const CL_COMMAND_FILL_BUFFER:                       cl_uint = 0x1207;
    pub const CL_COMMAND_FILL_IMAGE:                        cl_uint = 0x1208;
        //###### NEW ########
        pub const CL_COMMAND_SVM_FREE:                          cl_uint = 0x1209;
        pub const CL_COMMAND_SVM_MEMCPY:                        cl_uint = 0x120A;
        pub const CL_COMMAND_SVM_MEMFILL:                       cl_uint = 0x120B;
        pub const CL_COMMAND_SVM_MAP:                           cl_uint = 0x120C;
        pub const CL_COMMAND_SVM_UNMAP:                         cl_uint = 0x120D;

    // command execution status:
    pub const CL_COMPLETE:                                  cl_int = 0x0;
    pub const CL_RUNNING:                                   cl_int = 0x1;
    pub const CL_SUBMITTED:                                 cl_int = 0x2;
    pub const CL_QUEUED:                                    cl_int = 0x3;

    // cl_buffer_create_type:
    pub const CL_BUFFER_CREATE_TYPE_REGION:                 cl_uint = 0x1220;

    // cl_profiling_info:
    pub const CL_PROFILING_COMMAND_QUEUED:                  cl_uint = 0x1280;
    pub const CL_PROFILING_COMMAND_SUBMIT:                  cl_uint = 0x1281;
    pub const CL_PROFILING_COMMAND_START:                   cl_uint = 0x1282;
    pub const CL_PROFILING_COMMAND_END:                     cl_uint = 0x1283;
        //###### NEW ########
        pub const CL_PROFILING_COMMAND_COMPLETE:                cl_uint = 0x1284;

    //#[link_args = "-L$OPENCL_LIB -lOpenCL"]
    #[cfg_attr(target_os = "macos", link(name = "OpenCL", kind = "framework"))]
    #[cfg_attr(target_os = "windows", link(name = "OpenCL"))]
    #[cfg_attr(not(target_os = "macos"), link(name = "OpenCL"))]
    extern "system" {
        // Platform API:
        pub fn clGetPlatformIDs(num_entries: cl_uint,
                                platforms: *mut cl_platform_id,
                                num_platforms: *mut cl_uint) -> cl_int;

        pub fn clGetPlatformInfo(platform: cl_platform_id,
                                 param_name: cl_platform_info,
                                 param_value_size: size_t,
                                 param_value: *mut c_void,
                                 param_value_size_ret: *mut size_t) -> cl_int;

        // Device APIs:
        pub fn clGetDeviceIDs(platform: cl_platform_id,
                              device_type: cl_device_type,
                              num_entries: cl_uint,
                              devices: *mut cl_device_id,
                              num_devices: *mut cl_uint) -> cl_int;

        pub fn clGetDeviceInfo(device: cl_device_id,
                           param_name: cl_device_info,
                           param_value_size: size_t,
                           param_value: *mut c_void,
                           param_value_size_ret: *mut size_t) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clCreateSubDevices(cl_device_id                         /* in_device */,
        //                    const cl_device_partition_property * /* properties */,
        //                    cl_uint                              /* num_devices */,
        //                    cl_device_id *                       /* out_devices */,
        //                    cl_uint *                            /* num_devices_ret */) CL_API_SUFFIX__VERSION_1_2;
        //############################### NEW 1.2 #################################
        #[cfg(feature = "opencl_version_1_2")]
        pub fn clCreateSubDevices(in_device: cl_device_id,
                           properties: *const cl_device_partition_property,
                           num_devices: cl_uint,
                           out_devices: *mut cl_device_id,
                           num_devices_ret: *mut cl_uint) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clRetainDevice(cl_device_id /* device */) CL_API_SUFFIX__VERSION_1_2;
        //############################### NEW 1.2 #################################
        #[cfg(feature = "opencl_version_1_2")]
        pub fn clRetainDevice(device: cl_device_id) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clReleaseDevice(cl_device_id /* device */) CL_API_SUFFIX__VERSION_1_2;
        //############################### NEW 1.2 #################################
        #[cfg(feature = "opencl_version_1_2")]
        pub fn clReleaseDevice(device: cl_device_id ) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clSetDefaultDeviceCommandQueue(cl_context           /* context */,
        //                                cl_device_id         /* device */,
        //                                cl_command_queue     /* command_queue */) CL_API_SUFFIX__VERSION_2_1;
        //############################### NEW 2.1 #################################
        #[cfg(feature = "opencl_version_2_1")]
        pub fn clSetDefaultDeviceCommandQueue(context: cl_context,
                                              device: cl_device_id,
                                              command_queue: cl_command_queue) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clGetDeviceAndHostTimer(cl_device_id    /* device */,
        //                         cl_ulong*       /* device_timestamp */,
        //                         cl_ulong*       /* host_timestamp */) CL_API_SUFFIX__VERSION_2_1;
        //############################### NEW 2.1 #################################
        #[cfg(feature = "opencl_version_2_1")]
        pub fn clGetDeviceAndHostTimer(device: cl_device_id,
                                       device_timestamp: cl_ulong,
                                       host_timestamp: cl_ulong) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clGetHostTimer(cl_device_id /* device */,
        //                cl_ulong *   /* host_timestamp */)  CL_API_SUFFIX__VERSION_2_1;
        //############################### NEW 2.1 #################################
        #[cfg(feature = "opencl_version_2_1")]
        pub fn clGetHostTimer(device: cl_device_id,
                              host_timestamp: cl_ulong) -> cl_int;

        // Context APIs:
        pub fn clCreateContext(properties: *const cl_context_properties,
                           num_devices: cl_uint,
                           devices: *const cl_device_id,
                           pfn_notify: Option<extern fn (*const c_char, *const c_void, size_t, *mut c_void)>,
                           user_data: *mut c_void,
                           errcode_ret: *mut cl_int) -> cl_context;

        pub fn clCreateContextFromType(properties: *const cl_context_properties,
                                   device_type: cl_device_type,
                                   pfn_notify: Option<extern fn (*const c_char, *const c_void, size_t, *mut c_void)>,
                                   user_data: *mut c_void,
                                   errcode_ret: *mut cl_int) -> cl_context;

        pub fn clRetainContext(context: cl_context) -> cl_int;

        pub fn clReleaseContext(context: cl_context) -> cl_int;

        pub fn clGetContextInfo(context: cl_context,
                            param_name: cl_context_info,
                            param_value_size: size_t,
                            param_value: *mut c_void,
                            param_value_size_ret: *mut size_t) -> cl_int;

        // Command Queue APIs
        //########################## DEPRICATED 1.2 ##############################
        pub fn clCreateCommandQueue(context: cl_context,
                                device: cl_device_id,
                                properties: cl_command_queue_properties,
                                errcode_ret: *mut cl_int) -> cl_command_queue;

        // extern CL_API_ENTRY cl_command_queue CL_API_CALL
        // clCreateCommandQueueWithProperties(cl_context               /* context */,
        //                                    cl_device_id             /* device */,
        //                                    const cl_queue_properties *    /* properties */,
        //                                    cl_int *                 /* errcode_ret */) CL_API_SUFFIX__VERSION_2_0;
        //############################### NEW 2.0 #################################
        #[cfg(feature = "opencl_version_2_0")]
        pub fn clCreateCommandQueueWithProperties(context: cl_context,
                                                  device: cl_device_id,
                                                  properties: *const cl_queue_properties,
                                                  errcode_ret: *mut cl_int) -> cl_command_queue;

        pub fn clRetainCommandQueue(command_queue: cl_command_queue) -> cl_int;

        pub fn clReleaseCommandQueue(command_queue: cl_command_queue) -> cl_int;

        pub fn clGetCommandQueueInfo(command_queue: cl_command_queue,
                                 param_name: cl_command_queue_info,
                                 param_value_size: size_t,
                                 param_value: *mut c_void,
                                 param_value_size_ret: *mut size_t) -> cl_int;

        // Memory Object APIs:
        pub fn clCreateBuffer(context: cl_context,
                          flags: cl_mem_flags,
                          size: size_t,
                          host_ptr: *mut c_void,
                          errcode_ret: *mut cl_int) -> cl_mem;

        pub fn clCreateSubBuffer(buffer: cl_mem,
                            flags: cl_mem_flags,
                            buffer_create_type: cl_buffer_create_type,
                            buffer_create_info: *const c_void,
                            errcode_ret: *mut cl_int) -> cl_mem;

        //########################## DEPRICATED 1.1 ##############################
        pub fn clCreateImage2D(context: cl_context,
                        flags: cl_mem_flags,
                        image_format: *mut cl_image_format,
                        image_width: size_t,
                        image_depth: size_t,
                        image_slc_pitch: size_t,
                        host_ptr: *mut c_void,
                        errcode_ret: *mut cl_int) -> cl_mem;

        //########################## DEPRICATED 1.1 ##############################
        pub fn clCreateImage3D(context: cl_context,
                        flags: cl_mem_flags,
                        image_format: *mut cl_image_format,
                        image_width: size_t,
                        image_height: size_t,
                        image_depth: size_t,
                        image_row_pitch: size_t,
                        image_slc_pitch: size_t,
                        host_ptr: *mut c_void,
                        errcode_ret: *mut cl_int) -> cl_mem;

        //############################### NEW 1.2 #################################
        #[cfg(feature = "opencl_version_1_2")]
        pub fn clCreateImage(context: cl_context,
                            flags: cl_mem_flags,
                            image_format: *const cl_image_format,
                            image_desc: *const cl_image_desc,
                            host_ptr: *mut c_void,
                            errcode_ret: *mut cl_int) -> cl_mem;

        // extern CL_API_ENTRY cl_mem CL_API_CALL
        // clCreatePipe(cl_context                 /* context */,
        //              cl_mem_flags               /* flags */,
        //              cl_uint                    /* pipe_packet_size */,
        //              cl_uint                    /* pipe_max_packets */,
        //              const cl_pipe_properties * /* properties */,
        //              cl_int *                   /* errcode_ret */) CL_API_SUFFIX__VERSION_2_0;
        //############################### NEW 2.0 #################################
        #[cfg(feature = "opencl_version_2_0")]
        pub fn clCreatePipe(context: cl_context,
                            flags: cl_mem_flags,
                            pipe_packet_size: cl_uint,
                            pipe_max_packets: cl_uint,
                            properties: *const cl_pipe_properties,
                            errcode_ret: *mut cl_int) -> cl_mem;

        pub fn clRetainMemObject(memobj: cl_mem) -> cl_int;

        pub fn clReleaseMemObject(memobj: cl_mem) -> cl_int;

        pub fn clGetSupportedImageFormats(context: cl_context,
                                      flags: cl_mem_flags,
                                      image_type: cl_mem_object_type,
                                      num_entries: cl_uint,
                                      image_formats: *mut cl_image_format,
                                      num_image_formats: *mut cl_uint) -> cl_int;

        pub fn clGetMemObjectInfo(memobj: cl_mem,
                              param_name: cl_mem_info,
                              param_value_size: size_t,
                              param_value: *mut c_void,
                              param_value_size_ret: *mut size_t) -> cl_int;

        pub fn clGetImageInfo(image: cl_mem,
                          param_name: cl_image_info,
                          param_value_size: size_t,
                          param_value: *mut c_void,
                          param_value_size_ret: *mut size_t) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clGetPipeInfo(cl_mem           /* pipe */,
        //               cl_pipe_info     /* param_name */,
        //               size_t           /* param_value_size */,
        //               void *           /* param_value */,
        //               size_t *         /* param_value_size_ret */) CL_API_SUFFIX__VERSION_2_0;
        //############################### NEW 2.0 #################################
        #[cfg(feature = "opencl_version_2_0")]
        pub fn clGetPipeInfo(pipe: cl_mem,
                             param_name: cl_pipe_info,
                             param_value_size: size_t,
                             param_value: *mut c_void,
                             param_value_size_ret: *mut size_t) -> cl_int;

        pub fn clSetMemObjectDestructorCallback(memobj: cl_mem,
                                                pfn_notify: Option<extern fn (cl_mem, *mut c_void)>,
                                                user_data: *mut c_void) -> cl_int;

        // SVM Allocation APIs
        // extern CL_API_ENTRY void * CL_API_CALL
        // clSVMAlloc(cl_context       /* context */,
        //            cl_svm_mem_flags /* flags */,
        //            size_t           /* size */,
        //            cl_uint          /* alignment */) CL_API_SUFFIX__VERSION_2_0;
        //############################### NEW 2.0 #################################
        #[cfg(feature = "opencl_version_2_0")]
        pub fn clSVMAlloc(context: cl_context,
                          flags: cl_svm_mem_flags,
                          size: size_t,
                          alignment: cl_uint) -> *mut c_void;

        // extern CL_API_ENTRY void CL_API_CALL
        // clSVMFree(cl_context        /* context */,
        //           void *            /* svm_pointer */) CL_API_SUFFIX__VERSION_2_0;
        //############################### NEW 2.0 #################################
        #[cfg(feature = "opencl_version_2_0")]
        pub fn clSVMFree(context: cl_context,
                         svm_pointer: *mut c_void);

        // Sampler APIs:
        pub fn clCreateSampler(context: cl_context,
                           normalize_coords: cl_bool,
                           addressing_mode: cl_addressing_mode,
                           filter_mode: cl_filter_mode,
                           errcode_ret: *mut cl_int) -> cl_sampler;

        // extern CL_API_ENTRY cl_sampler CL_API_CALL
        // clCreateSamplerWithProperties(cl_context                     /* context */,
        //                               const cl_sampler_properties *  /* normalized_coords */,
        //                               cl_int *                       /* errcode_ret */) CL_API_SUFFIX__VERSION_2_0;
        //############################### NEW 2.0 #################################
        #[cfg(feature = "opencl_version_2_0")]
        pub fn clCreateSamplerWithProperties(context: cl_context,
                                             normalized_coords: *const cl_sampler_properties,
                                             errcode_ret: *mut cl_int) -> cl_sampler;

        pub fn clRetainSampler(sampler: cl_sampler) -> cl_int;

        pub fn clReleaseSampler(sampler: cl_sampler) ->cl_int;

        pub fn clGetSamplerInfo(sampler: cl_sampler,
                            param_name: cl_sampler_info,
                            param_value_size: size_t,
                            param_value: *mut c_void,
                            param_value_size_ret: *mut size_t) -> cl_int;

        // Program Object APIs:
        pub fn clCreateProgramWithSource(context: cl_context,
                                     count: cl_uint,
                                     strings: *const *const c_char,
                                     lengths: *const size_t,
                                     errcode_ret: *mut cl_int) -> cl_program;

        pub fn clCreateProgramWithBinary(context: cl_context,
                                     num_devices: cl_uint,
                                     device_list: *const cl_device_id,
                                     lengths: *const size_t,
                                     binaries: *const *const c_uchar,
                                     binary_status: *mut cl_int,
                                     errcode_ret: *mut cl_int) -> cl_program;

        // extern CL_API_ENTRY cl_program CL_API_CALL
        // clCreateProgramWithBuiltInKernels(cl_context            /* context */,
        //                                  cl_uint               /* num_devices */,
        //                                  const cl_device_id *  /* device_list */,
        //                                  const char *          /* kernel_names */,
        //                                  cl_int *              /* errcode_ret */) CL_API_SUFFIX__VERSION_1_2;
        //############################### NEW 1.2 #################################
        #[cfg(feature = "opencl_version_1_2")]
        pub fn clCreateProgramWithBuiltInKernels(context: cl_context,
                                         num_devices: cl_uint,
                                         device_list: *const cl_device_id,
                                         kernel_names: *mut char,
                                         errcode_ret: *mut cl_int) -> cl_program;

        // extern CL_API_ENTRY cl_program CL_API_CALL
        // clCreateProgramWithIL(cl_context    /* context */,
        //                      const void*    /* il */,
        //                      size_t         /* length */,
        //                      cl_int*        /* errcode_ret */) CL_API_SUFFIX__VERSION_2_1;
        //############################### NEW 2.1 #################################
        #[cfg(feature = "opencl_version_2_1")]
        pub fn clCreateProgramWithIL(context: cl_context,
                                     il: *const c_void,
                                     length: size_t,
                                     errcode_ret: *mut cl_int) -> cl_program;

        pub fn clRetainProgram(program: cl_program) -> cl_int;

        pub fn clReleaseProgram(program: cl_program) -> cl_int;

        pub fn clBuildProgram(program: cl_program,
                          num_devices: cl_uint,
                          device_list: *const cl_device_id,
                          options: *const c_char,
                          pfn_notify: Option<extern fn (cl_program, *mut c_void)>,
                          user_data: *mut c_void) -> cl_int;

        //########################## DEPRICATED 1.1 ##############################
        pub fn clUnloadCompiler() -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clCompileProgram(cl_program           /* program */,
        //                 cl_uint              /* num_devices */,
        //                 const cl_device_id * /* device_list */,
        //                 const char *         /* options */,
        //                 cl_uint              /* num_input_headers */,
        //                 const cl_program *   /* input_headers */,
        //                 const char **        /* header_include_names */,
        //                 void (CL_CALLBACK *  /* pfn_notify */)(cl_program /* program */, void * /* user_data */),
        //                 void *               /* user_data */) CL_API_SUFFIX__VERSION_1_2;
        //############################### NEW 1.2 #################################
        #[cfg(feature = "opencl_version_1_2")]
        pub fn clCompileProgram(program: cl_program,
                        num_devices: cl_uint,
                        device_list: *const cl_device_id,
                        options: *const c_char,
                        num_input_headers: cl_uint,
                        input_headers: *const cl_program,
                        header_include_names: *const *const c_char,
                        pfn_notify: Option<extern fn (program: cl_program, user_data: *mut c_void)>,
                        user_data: *mut c_void) -> cl_int;

        // extern CL_API_ENTRY cl_program CL_API_CALL
        // clLinkProgram(cl_context           /* context */,
        //               cl_uint              /* num_devices */,
        //               const cl_device_id * /* device_list */,
        //               const char *         /* options */,
        //               cl_uint              /* num_input_programs */,
        //               const cl_program *   /* input_programs */,
        //               void (CL_CALLBACK *  /* pfn_notify */)(cl_program /* program */, void * /* user_data */),
        //               void *               /* user_data */,
        //               cl_int *             /* errcode_ret */ ) CL_API_SUFFIX__VERSION_1_2;
        //############################### NEW 1.2 #################################
        #[cfg(feature = "opencl_version_1_2")]
        pub fn clLinkProgram(context: cl_context,
                      num_devices: cl_uint,
                      device_list: *const cl_device_id,
                      options: *const c_char,
                      num_input_programs: cl_uint,
                      input_programs: *const cl_program,
                      pfn_notify: Option<extern fn (program: cl_program, user_data: *mut c_void)>,
                      user_data: *mut c_void,
                      errcode_ret: *mut cl_int) -> cl_program;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clUnloadPlatformCompiler(cl_platform_id /* platform */) CL_API_SUFFIX__VERSION_1_2;
        // //############################### NEW 1.2 #################################
        #[cfg(feature = "opencl_version_1_2")]
        // [DISABLED DUE TO PLATFORM INCOMPATABILITY]
        // pub fn clUnloadPlatformCompiler(platform: cl_platform_id) -> cl_int;

        pub fn clGetProgramInfo(program: cl_program,
                            param_name: cl_program_info,
                            param_value_size: size_t,
                            param_value: *mut c_void,
                            param_value_size_ret: *mut size_t) -> cl_int;

        pub fn clGetProgramBuildInfo(program: cl_program,
                                 device: cl_device_id,
                                 param_name: cl_program_build_info,
                                 param_value_size: size_t,
                                 param_value: *mut c_void,
                                 param_value_size_ret: *mut size_t) -> cl_int;

        // Kernel Object APIs:
        pub fn clCreateKernel(program: cl_program,
                          kernel_name: *const c_char,
                          errcode_ret: *mut cl_int) -> cl_kernel;

        pub fn clCreateKernelsInProgram(program: cl_program,
                                    num_kernels: cl_uint,
                                    kernels: *mut cl_kernel,
                                    num_kernels_ret: *mut cl_uint) -> cl_int;

        // extern CL_API_ENTRY cl_kernel CL_API_CALL
        // clCloneKernel(cl_kernel     /* source_kernel */,
        //               cl_int*       /* errcode_ret */) CL_API_SUFFIX__VERSION_2_1;
        //############################### NEW 2.1 #################################
        #[cfg(feature = "opencl_version_2_1")]
        pub fn clCloneKernel(source_kernel: cl_kernel,
                             errcode_ret: *mut cl_int) -> cl_kernel;

        pub fn clRetainKernel(kernel: cl_kernel) -> cl_int;

        pub fn clReleaseKernel(kernel: cl_kernel) -> cl_int;

        pub fn clSetKernelArg(kernel: cl_kernel,
                          arg_index: cl_uint,
                          arg_size: size_t,
                          arg_value: *const c_void) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clSetKernelArgSVMPointer(cl_kernel    /* kernel */,
        //                          cl_uint      /* arg_index */,
        //                          const void * /* arg_value */) CL_API_SUFFIX__VERSION_2_0;
        //############################### NEW 2.0 #################################
        #[cfg(feature = "opencl_version_2_0")]
        pub fn clSetKernelArgSVMPointer(kernel: cl_kernel,
                                        arg_index: cl_uint,
                                        arg_value: *const c_void) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clSetKernelExecInfo(cl_kernel            /* kernel */,
        //                     cl_kernel_exec_info  /* param_name */,
        //                     size_t               /* param_value_size */,
        //                     const void *         /* param_value */) CL_API_SUFFIX__VERSION_2_0;
        //############################### NEW 2.0 #################################
        #[cfg(feature = "opencl_version_2_0")]
        pub fn clSetKernelExecInfo(kernel: cl_kernel,
                                   param_name: cl_kernel_exec_info,
                                   param_value_size: size_t,
                                   param_value: *const c_void) -> cl_int;

        pub fn clGetKernelInfo(kernel: cl_kernel,
                           param_name: cl_kernel_info,
                           param_value_size: size_t,
                           param_value: *mut c_void,
                           param_value_size_ret: *mut size_t) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clGetKernelArgInfo(cl_kernel       /* kernel */,
        //                   cl_uint         /* arg_indx */,
        //                   cl_kernel_arg_info  /* param_name */,
        //                   size_t          /* param_value_size */,
        //                   void *          /* param_value */,
        //                   size_t *        /* param_value_size_ret */) CL_API_SUFFIX__VERSION_1_2;
        //############################### NEW 1.2 #################################
        #[cfg(feature = "opencl_version_1_2")]
        pub fn clGetKernelArgInfo(kernel: cl_kernel,
                          arg_indx: cl_uint,
                          param_name: cl_kernel_arg_info,
                          param_value_size: size_t,
                          param_value: *mut c_void,
                          param_value_size_ret: *mut size_t) -> cl_int;

        pub fn clGetKernelWorkGroupInfo(kernel: cl_kernel,
                                    device: cl_device_id,
                                    param_name: cl_kernel_work_group_info,
                                    param_value_size: size_t,
                                    param_value: *mut c_void,
                                    param_value_size_ret: *mut size_t) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clGetKernelSubGroupInfo(cl_kernel                   /* kernel */,
        //                         cl_device_id                /* device */,
        //                         cl_kernel_sub_group_info    /* param_name */,
        //                         size_t                      /* input_value_size */,
        //                         const void*                 /*input_value */,
        //                         size_t                      /* param_value_size */,
        //                         void*                       /* param_value */,
        //                         size_t*                     /* param_value_size_ret */ ) CL_API_SUFFIX__VERSION_2_1;
        //############################### NEW 2.1 #################################
        #[cfg(feature = "opencl_version_2_1")]
        pub fn clGetKernelSubGroupInfo(kernel: cl_kernel,
                                       device: cl_device_id,
                                       param_name: cl_kernel_sub_group_info,
                                       input_value_size: size_t,
                                       input_value: *const c_void,
                                       param_value_size: size_t,
                                       param_value: *mut c_void,
                                       param_value_size_ret: *mut size_t) -> cl_int;

        // Event Object APIs:
        pub fn clWaitForEvents(num_events: cl_uint,
                           event_list: *const cl_event) -> cl_int;

        pub fn clGetEventInfo(event: cl_event,
                          param_name: cl_event_info,
                          param_value_size: size_t,
                          param_value: *mut c_void,
                          param_value_size_ret: *mut size_t) -> cl_int;

        pub fn clCreateUserEvent(context: cl_context,
                             errcode_ret: *mut cl_int) -> cl_event;

        pub fn clRetainEvent(event: cl_event) -> cl_int;

        pub fn clReleaseEvent(event: cl_event) -> cl_int;

        pub fn clSetUserEventStatus(event: cl_event,
                                execution_status: cl_int) -> cl_int;

        pub fn clSetEventCallback(event: cl_event,
                              command_exec_callback_type: cl_int,
                              pfn_notify: Option<extern fn (cl_event, cl_int, *mut c_void)>,
                              user_data: *mut c_void) -> cl_int;

        // Profiling APIs:
        pub fn clGetEventProfilingInfo(event: cl_event,
                                   param_name: cl_profiling_info,
                                   param_value_size: size_t,
                                   param_value: *mut c_void,
                                   param_value_size_ret: *mut size_t) -> cl_int;

        // Flush and Finish APIs:
        pub fn clFlush(command_queue: cl_command_queue) -> cl_int;

        pub fn clFinish(command_queue: cl_command_queue) -> cl_int;

        // Enqueued Commands APIs:
        pub fn clEnqueueReadBuffer(command_queue: cl_command_queue,
                               buffer: cl_mem,
                               blocking_read: cl_bool,
                               offset: size_t,
                               cb: size_t,
                               ptr: *mut c_void,
                               num_events_in_wait_list: cl_uint,
                               event_wait_list: *const cl_event,
                               event: *mut cl_event) -> cl_int;

        pub fn clEnqueueReadBufferRect(command_queue: cl_command_queue,
                                   buffer: cl_mem,
                                   blocking_read: cl_bool,
                                   buffer_origin: *const size_t,
                                   host_origin: *const size_t,
                                   region: *const size_t,
                                   buffer_row_pitch: size_t,
                                   buffer_slc_pitch: size_t,
                                   host_row_pitch: size_t,
                                   host_slc_pitch: size_t,
                                   ptr: *mut c_void,
                                   num_events_in_wait_list: cl_uint,
                                   event_wait_list: *const cl_event,
                                   event: *mut cl_event) -> cl_int;

        pub fn clEnqueueWriteBuffer(command_queue: cl_command_queue,
                                buffer: cl_mem,
                                blocking_write: cl_bool,
                                offset: size_t,
                                cb: size_t,
                                ptr: *const c_void,
                                num_events_in_wait_list: cl_uint,
                                event_wait_list: *const cl_event,
                                event: *mut cl_event) -> cl_int;

        pub fn clEnqueueWriteBufferRect(command_queue: cl_command_queue,
                                    buffer: cl_mem,
                                    blocking_write: cl_bool,
                                    buffer_origin: *const size_t,
                                    host_origin: *const size_t,
                                    region: *const size_t,
                                    buffer_row_pitch: size_t,
                                    buffer_slc_pitch: size_t,
                                    host_row_pitch: size_t,
                                    host_slc_pitch: size_t,
                                    ptr: *const c_void,
                                    num_events_in_wait_list: cl_uint,
                                    event_wait_list: *const cl_event,
                                    event: *mut cl_event) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clEnqueueFillBuffer(cl_command_queue   /* command_queue */,
        //                 cl_mem             /* buffer */,
        //                 const void *       /* pattern */,
        //                 size_t             /* pattern_size */,
        //                 size_t             /* offset */,
        //                 size_t             /* size */,
        //                 cl_uint            /* num_events_in_wait_list */,
        //                 const cl_event *   /* event_wait_list */,
        //                 cl_event *         /* event */) CL_API_SUFFIX__VERSION_1_2;
        //############################### NEW 1.2 #################################
        #[cfg(feature = "opencl_version_1_2")]
        pub fn clEnqueueFillBuffer(command_queue: cl_command_queue,
                        buffer: cl_mem,
                        pattern: *const c_void,
                        pattern_size: size_t,
                        offset: size_t,
                        size: size_t,
                        num_events_in_wait_list: cl_uint,
                        event_wait_list: *const cl_event,
                        event: *mut cl_event) -> cl_int;

        pub fn clEnqueueCopyBuffer(command_queue: cl_command_queue,
                               src_buffer: cl_mem,
                               dst_buffer: cl_mem,
                               src_offset: size_t,
                               dst_offset: size_t,
                               cb: size_t,
                               num_events_in_wait_list: cl_uint,
                               event_wait_list: *const cl_event,
                               event: *mut cl_event) -> cl_int;

        pub fn clEnqueueCopyBufferRect(command_queue: cl_command_queue,
                                   src_buffer: cl_mem,
                                   dst_buffer: cl_mem,
                                   src_origin: *const size_t,
                                   dst_origin: *const size_t,
                                   region: *const size_t,
                                   src_row_pitch: size_t,
                                   src_slc_pitch: size_t,
                                   dst_row_pitch: size_t,
                                   dst_slc_pitch: size_t,
                                   num_events_in_wait_list: cl_uint,
                                   event_wait_list: *const cl_event,
                                   event: *mut cl_event) -> cl_int;

        pub fn clEnqueueReadImage(command_queue: cl_command_queue,
                              image: cl_mem,
                              blocking_read: cl_bool,
                              origin: *const size_t,
                              region: *const size_t,
                              row_pitch: size_t,
                              slc_pitch: size_t,
                              ptr: *mut c_void,
                              num_events_in_wait_list: cl_uint,
                              event_wait_list: *const cl_event,
                              event: *mut cl_event) -> cl_int;

        pub fn clEnqueueWriteImage(command_queue: cl_command_queue,
                               image: cl_mem,
                               blocking_write: cl_bool,
                               origin: *const size_t,
                               region: *const size_t,
                               input_row_pitch: size_t,
                               input_slc_pitch: size_t,
                               ptr: *const c_void,
                               num_events_in_wait_list: cl_uint,
                               event_wait_list: *const cl_event,
                               event: *mut cl_event) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clEnqueueFillImage(cl_command_queue   /* command_queue */,
        //                   cl_mem             /* image */,
        //                   const void *       /* fill_color */,
        //                   const size_t *     /* origin[3] */,
        //                   const size_t *     /* region[3] */,
        //                   cl_uint            /* num_events_in_wait_list */,
        //                   const cl_event *   /* event_wait_list */,
        //                   cl_event *         /* event */) CL_API_SUFFIX__VERSION_1_2;
        //############################### NEW 1.2 #################################
        #[cfg(feature = "opencl_version_1_2")]
        pub fn clEnqueueFillImage(command_queue: cl_command_queue,
                          image: cl_mem,
                          fill_color: *const c_void,
                          origin: *const size_t,
                          region: *const size_t,
                          num_events_in_wait_list: cl_uint,
                          event_wait_list: *const cl_event,
                          event: *mut cl_event) -> cl_int;

        pub fn clEnqueueCopyImage(command_queue: cl_command_queue,
                              src_image: cl_mem,
                              dst_image: cl_mem,
                              src_origin: *const size_t,
                              dst_origin: *const size_t,
                              region: *const size_t,
                              num_events_in_wait_list: cl_uint,
                              event_wait_list: *const cl_event,
                              event: *mut cl_event) -> cl_int;

        pub fn clEnqueueCopyImageToBuffer(command_queue: cl_command_queue,
                                      src_image: cl_mem,
                                      dst_buffer: cl_mem,
                                      src_origin: *const size_t,
                                      region: *const size_t,
                                      dst_offset: size_t,
                                      num_events_in_wait_list: cl_uint,
                                      event_wait_list: *const cl_event,
                                      event: *mut cl_event) -> cl_int;

        pub fn clEnqueueCopyBufferToImage(command_queue: cl_command_queue,
                                      src_buffer: cl_mem,
                                      dst_image: cl_mem,
                                      src_offset: size_t,
                                      dst_origin: *const size_t,
                                      region: *const size_t,
                                      num_events_in_wait_list: cl_uint,
                                      event_wait_list: *const cl_event,
                                      event: *mut cl_event) -> cl_int;

        pub fn clEnqueueMapBuffer(command_queue: cl_command_queue,
                              buffer: cl_mem,
                              blocking_map: cl_bool,
                              map_flags: cl_map_flags,
                              offset: size_t,
                              size: size_t,
                              num_events_in_wait_list: cl_uint,
                              event_wait_list: *const cl_event,
                              event: *mut cl_event,
                              errorcode_ret: *mut cl_int) -> *mut c_void;

        pub fn clEnqueueMapImage(command_queue: cl_command_queue,
                             image: cl_mem,
                             blocking_map: cl_bool,
                             map_flags: cl_map_flags,
                             origin: *const size_t,
                             region: *const size_t,
                             image_row_pitch: *mut size_t,
                             image_slc_pitch: *mut size_t,
                             num_events_in_wait_list: cl_uint,
                             event_wait_list: *const cl_event,
                             event: *mut cl_event,
                             errorcode_ret: *mut cl_int) -> *mut c_void;

        pub fn clEnqueueUnmapMemObject(command_queue: cl_command_queue,
                                   memobj: cl_mem,
                                   mapped_ptr: *mut c_void,
                                   num_events_in_wait_list: cl_uint,
                                   event_wait_list: *const cl_event,
                                   event: *mut cl_event) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clEnqueueMigrateMemObjects(cl_command_queue       /* command_queue */,
        //                           cl_uint                /* num_mem_objects */,
        //                           const cl_mem *         /* mem_objects */,
        //                           cl_mem_migration_flags /* flags */,
        //                           cl_uint                /* num_events_in_wait_list */,
        //                           const cl_event *       /* event_wait_list */,
        //                           cl_event *             /* event */) CL_API_SUFFIX__VERSION_1_2;
        //############################### NEW 1.2 #################################
        #[cfg(feature = "opencl_version_1_2")]
        pub fn clEnqueueMigrateMemObjects(command_queue: cl_command_queue,
                                  num_mem_objects: cl_uint,
                                  mem_objects: *const cl_mem,
                                  flags: cl_mem_migration_flags,
                                  num_events_in_wait_list: cl_uint,
                                  event_wait_list: *const cl_event,
                                  event: *mut cl_event) -> cl_int;

        pub fn clEnqueueNDRangeKernel(command_queue: cl_command_queue,
                                  kernel: cl_kernel,
                                  work_dim: cl_uint,
                                  global_work_offset: *const size_t,
                                  global_work_dims: *const size_t,
                                  local_work_dims: *const size_t,
                                  num_events_in_wait_list: cl_uint,
                                  event_wait_list: *const cl_event,
                                  event: *mut cl_event) -> cl_int;

        //########################## DEPRICATED 1.2 ##############################
        pub fn clEnqueueTask(command_queue: cl_command_queue,
                         kernel: cl_kernel,
                         num_events_in_wait_list: cl_uint,
                         event_wait_list: *const cl_event,
                         event: *mut cl_event) -> cl_int;

        pub fn clEnqueueNativeKernel(command_queue: cl_command_queue,
                                 user_func: Option<extern fn (*mut c_void)>,
                                 args: *mut c_void,
                                 cb_args: size_t,
                                 num_mem_objects: cl_uint,
                                 mem_list: *const cl_mem,
                                 args_mem_loc: *const *const c_void,
                                 num_events_in_wait_list: cl_uint,
                                 event_wait_list: *const cl_event,
                                 event: *mut cl_event) -> cl_int;

        //########################## DEPRICATED 1.1 ##############################
        pub fn clEnqueueMarker(command_queue: cl_command_queue,
                        event: *mut cl_event) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clEnqueueMarkerWithWaitList(cl_command_queue /* command_queue */,
        //          cl_uint           /* num_events_in_wait_list */,
        //          const cl_event *  /* event_wait_list */,
        //          cl_event *        /* event */) CL_API_SUFFIX__VERSION_1_2;
        //############################### NEW 1.2 #################################
        #[cfg(feature = "opencl_version_1_2")]
        pub fn clEnqueueMarkerWithWaitList(command_queue: cl_command_queue,
                 num_events_in_wait_list: cl_uint,
                 event_wait_list: *const cl_event,
                 event: *mut cl_event) -> cl_int;

        //########################## DEPRICATED 1.1 ##############################
        pub fn clEnqueueWaitForEvents(command_queue: cl_command_queue,
                               num_events: cl_uint,
                               event_list: *mut cl_event) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clEnqueueBarrierWithWaitList(
        //          cl_command_queue
        //           // command_queue
        //          ,
        //          cl_uint
        //           // num_events_in_wait_list
        //          ,
        //          const cl_event *
        //           // event_wait_list
        //          ,
        //          cl_event *
        //           // event
        //      ) CL_API_SUFFIX__VERSION_1_2;
        //############################### NEW 1.2 #################################
        #[cfg(feature = "opencl_version_1_2")]
        pub fn clEnqueueBarrierWithWaitList(
                 command_queue: cl_command_queue,
                 num_events_in_wait_list: cl_uint,
                 event_wait_list: *const cl_event,
                 event: *mut cl_event) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clEnqueueSVMFree(cl_command_queue  /* command_queue */,
        //                  cl_uint           /* num_svm_pointers */,
        //                  void *[]          /* svm_pointers[] */,
        //                  void (CL_CALLBACK * /*pfn_free_func*/)(cl_command_queue /* queue */,
        //                                                         cl_uint          /* num_svm_pointers */,
        //                                                         void *[]         /* svm_pointers[] */,
        //                                                         void *           /* user_data */),
        //                  void *            /* user_data */,
        //                  cl_uint           /* num_events_in_wait_list */,
        //                  const cl_event *  /* event_wait_list */,
        //                  cl_event *        /* event */) CL_API_SUFFIX__VERSION_2_0;
        //############################### NEW 2.0 #################################
        #[cfg(feature = "opencl_version_2_0")]
        pub fn clEnqueueSVMFree(command_queue: cl_command_queue,
                                num_svm_pointers: cl_uint,
                                svm_pointers: *const *const c_void,
                                pfn_free_func: Option<extern fn (
                                            queue: cl_command_queue,
                                            num_svm_pointers: cl_uint,
                                            svm_pointers: *const *const c_void,
                                            user_data: *mut c_void)>,
                                user_data: *mut c_void,
                                num_events_in_wait_list: cl_uint,
                                event_wait_list: *const cl_event,
                                event: *mut cl_event) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clEnqueueSVMMemcpy(cl_command_queue  /* command_queue */,
        //                    cl_bool           /* blocking_copy */,
        //                    void *            /* dst_ptr */,
        //                    const void *      /* src_ptr */,
        //                    size_t            /* size */,
        //                    cl_uint           /* num_events_in_wait_list */,
        //                    const cl_event *  /* event_wait_list */,
        //                    cl_event *        /* event */) CL_API_SUFFIX__VERSION_2_0;
        //############################### NEW 2.0 #################################
        #[cfg(feature = "opencl_version_2_0")]
        pub fn clEnqueueSVMMemcpy(command_queue: cl_command_queue,
                                  blocking_copy: cl_bool,
                                  dst_ptr: *mut c_void,
                                  src_ptr: *const c_void,
                                  size: size_t,
                                  num_events_in_wait_list: cl_uint,
                                  event_wait_list: *const cl_event,
                                  event: *mut cl_event) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clEnqueueSVMMemFill(cl_command_queue  /* command_queue */,
        //                     void *            /* svm_ptr */,
        //                     const void *      /* pattern */,
        //                     size_t            /* pattern_size */,
        //                     size_t            /* size */,
        //                     cl_uint           /* num_events_in_wait_list */,
        //                     const cl_event *  /* event_wait_list */,
        //                     cl_event *        /* event */) CL_API_SUFFIX__VERSION_2_0;
        //############################### NEW 2.0 #################################
        #[cfg(feature = "opencl_version_2_0")]
        pub fn clEnqueueSVMMemFill(command_queue: cl_command_queue,
                                   svm_ptr: *mut c_void,
                                   pattern: *const c_void,
                                   pattern_size: size_t,
                                   size: size_t,
                                   num_events_in_wait_list: cl_uint,
                                   event_wait_list: *const cl_event,
                                   event: *mut cl_event) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clEnqueueSVMMap(cl_command_queue  /* command_queue */,
        //                 cl_bool           /* blocking_map */,
        //                 cl_map_flags      /* flags */,
        //                 void *            /* svm_ptr */,
        //                 size_t            /* size */,
        //                 cl_uint           /* num_events_in_wait_list */,
        //                 const cl_event *  /* event_wait_list */,
        //                 cl_event *        /* event */) CL_API_SUFFIX__VERSION_2_0;
        //############################### NEW 2.0 #################################
        #[cfg(feature = "opencl_version_2_0")]
        pub fn clEnqueueSVMMap(command_queue: cl_command_queue,
                               blocking_map: cl_bool,
                               flags: cl_map_flags,
                               svm_ptr: *mut c_void,
                               size: size_t,
                               num_events_in_wait_list: cl_uint,
                               event_wait_list: *const cl_event,
                               event: *mut cl_event) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clEnqueueSVMUnmap(cl_command_queue  /* command_queue */,
        //                   void *            /* svm_ptr */,
        //                   cl_uint           /* num_events_in_wait_list */,
        //                   const cl_event *  /* event_wait_list */,
        //                   cl_event *        /* event */) CL_API_SUFFIX__VERSION_2_0;
        //############################### NEW 2.0 #################################
        #[cfg(feature = "opencl_version_2_0")]
        pub fn clEnqueueSVMUnmap(command_queue: cl_command_queue,
                                 svm_ptr: *mut c_void,
                                 num_events_in_wait_list: cl_uint,
                                 event_wait_list: *const cl_event,
                                 event: *mut cl_event) -> cl_int;

        // extern CL_API_ENTRY cl_int CL_API_CALL
        // clEnqueueSVMMigrateMem(cl_command_queue         /* command_queue */,
        //                        cl_uint                  /* num_svm_pointers */,
        //                        const void **            /* svm_pointers */,
        //                        const size_t *           /* sizes */,
        //                        cl_mem_migration_flags   /* flags */,
        //                        cl_uint                  /* num_events_in_wait_list */,
        //                        const cl_event *         /* event_wait_list */,
        //                        cl_event *               /* event */) CL_API_SUFFIX__VERSION_2_1;
        //############################### NEW 2.1 #################################
        #[cfg(feature = "opencl_version_2_1")]
        pub fn clEnqueueSVMMigrateMem(command_queue: cl_command_queue,
                                      num_svm_pointers: cl_uint,
                                      svm_pointers: *const *const c_void,
                                      sizes: *const size_t,
                                      flags: cl_mem_migration_flags,
                                      num_events_in_wait_list: cl_uint,
                                      event_wait_list: *const cl_event,
                                      event: *mut cl_event) -> cl_int;

        //########################## DEPRICATED 1.1 ##############################
        pub fn clEnqueueBarrier(command_queue: cl_command_queue) -> cl_int;

        //########################## DEPRICATED 1.1 ##############################
        // Extension function access
        // Returns the extension function address for the given function name,
        // or NULL if a valid function can not be found. The client must
        // check to make sure the address is not NULL, before using or
        // or calling the returned function address.
        pub fn clGetExtensionFunctionAddress(func_name: *mut c_char);

        // extern CL_API_ENTRY void * CL_API_CALL
        // clGetExtensionFunctionAddressForPlatform(cl_platform_id /* platform */,
        //                    const char *
        //                     // func_name
        //                    ) CL_API_SUFFIX__VERSION_1_2;
        //############################### NEW 1.2 #################################
        #[cfg(feature = "opencl_version_1_2")]
        pub fn clGetExtensionFunctionAddressForPlatform(platform: cl_platform_id,
                           func_name: *const c_char) -> *mut c_void;
    }

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