device_copy.cuh

File members: /home/runner/work/cccl/cccl/cub/cub/device/device_copy.cuh
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#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 <thrust/system/cuda/detail/core/triple_chevron_launch.h>

#include <cstdint>

CUB_NAMESPACE_BEGIN

struct DeviceCopy
{
  template <typename InputIt, typename OutputIt, typename SizeIteratorT>
  CUB_RUNTIME_FUNCTION static cudaError_t Batched(
    void* d_temp_storage,
    size_t& temp_storage_bytes,
    InputIt input_it,
    OutputIt output_it,
    SizeIteratorT sizes,
    uint32_t num_ranges,
    cudaStream_t stream = 0)
  {
    CUB_DETAIL_NVTX_RANGE_SCOPE_IF(d_temp_storage, "cub::DeviceCopy::Batched");

    // Integer type large enough to hold any offset in [0, num_ranges)
    using RangeOffsetT = 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_ranges, 64)
    using BlockOffsetT = uint32_t;

    return detail::DispatchBatchMemcpy<
      InputIt,
      OutputIt,
      SizeIteratorT,
      RangeOffsetT,
      BlockOffsetT,
      detail::DeviceBatchMemcpyPolicy<RangeOffsetT, BlockOffsetT>,
      false>::Dispatch(d_temp_storage, temp_storage_bytes, input_it, output_it, sizes, num_ranges, stream);
  }
};

CUB_NAMESPACE_END