exec_policy.hpp

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/*
 * Copyright (c) 2020-2021, NVIDIA CORPORATION.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#pragma once
 
#include <rmm/cuda_stream_view.hpp>
#include <rmm/mr/device/thrust_allocator_adaptor.hpp>
 
#include <rmm/detail/thrust_namespace.h>
#include <thrust/system/cuda/execution_policy.h>
#include <thrust/version.h>
 
namespace rmm {
using thrust_exec_policy_t =
  thrust::detail::execute_with_allocator<rmm::mr::thrust_allocator<char>,
                                         thrust::cuda_cub::execute_on_stream_base>;
 
class exec_policy : public thrust_exec_policy_t {
 public:
  explicit exec_policy(cuda_stream_view stream             = cuda_stream_default,
                       rmm::mr::device_memory_resource* mr = mr::get_current_device_resource())
    : thrust_exec_policy_t(
        thrust::cuda::par(rmm::mr::thrust_allocator<char>(stream, mr)).on(stream.value()))
  {
  }
};
 
#if THRUST_VERSION >= 101600
 
using thrust_exec_policy_nosync_t =
  thrust::detail::execute_with_allocator<rmm::mr::thrust_allocator<char>,
                                         thrust::cuda_cub::execute_on_stream_nosync_base>;
class exec_policy_nosync : public thrust_exec_policy_nosync_t {
 public:
  explicit exec_policy_nosync(
    cuda_stream_view stream             = cuda_stream_default,
    rmm::mr::device_memory_resource* mr = mr::get_current_device_resource())
    : thrust_exec_policy_nosync_t(
        thrust::cuda::par_nosync(rmm::mr::thrust_allocator<char>(stream, mr)).on(stream.value()))
  {
  }
};
 
#else
 
using thrust_exec_policy_nosync_t =
  thrust_exec_policy_t;  
using exec_policy_nosync =
  exec_policy;  
#endif
  // end of group
}  // namespace rmm