cub/device/device_memcpy.cuh
File members: cub/device/device_memcpy.cuh
/******************************************************************************
* Copyright (c) 2011-2022, NVIDIA CORPORATION. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the NVIDIA CORPORATION nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************/
#pragma once
#include <cub/config.cuh>
#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
# pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
# pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
# pragma system_header
#endif // no system header
#include <cub/detail/nvtx.cuh>
#include <cub/device/dispatch/dispatch_batch_memcpy.cuh>
#include <cstdint>
#include <type_traits>
CUB_NAMESPACE_BEGIN
struct DeviceMemcpy
{
template <typename InputBufferIt, typename OutputBufferIt, typename BufferSizeIteratorT>
CUB_RUNTIME_FUNCTION static cudaError_t Batched(
void* d_temp_storage,
size_t& temp_storage_bytes,
InputBufferIt input_buffer_it,
OutputBufferIt output_buffer_it,
BufferSizeIteratorT buffer_sizes,
uint32_t num_buffers,
cudaStream_t stream = 0)
{
CUB_DETAIL_NVTX_RANGE_SCOPE_IF(d_temp_storage, "cub::DeviceMemcpy::Batched");
static_assert(std::is_pointer<cub::detail::value_t<InputBufferIt>>::value,
"DeviceMemcpy::Batched only supports copying of memory buffers."
"Please consider using DeviceCopy::Batched instead.");
static_assert(std::is_pointer<cub::detail::value_t<OutputBufferIt>>::value,
"DeviceMemcpy::Batched only supports copying of memory buffers."
"Please consider using DeviceCopy::Batched instead.");
// Integer type large enough to hold any offset in [0, num_buffers)
using BufferOffsetT = uint32_t;
// Integer type large enough to hold any offset in [0, num_thread_blocks_launched), where a safe
// uppper bound on num_thread_blocks_launched can be assumed to be given by
// IDIV_CEIL(num_buffers, 64)
using BlockOffsetT = uint32_t;
return detail::DispatchBatchMemcpy<
InputBufferIt,
OutputBufferIt,
BufferSizeIteratorT,
BufferOffsetT,
BlockOffsetT,
detail::DeviceBatchMemcpyPolicy<BufferOffsetT, BlockOffsetT>,
true>::Dispatch(d_temp_storage,
temp_storage_bytes,
input_buffer_it,
output_buffer_it,
buffer_sizes,
num_buffers,
stream);
}
};
CUB_NAMESPACE_END