/******************************************************************************
 * Copyright (c) 2016, NVIDIA CORPORATION.  All rights reserved.
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 * 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.
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 *       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;
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 ******************************************************************************/
#pragma once


#include <thrust/system/cuda/config.h>
#include <thrust/system/cuda/detail/execution_policy.h>
#include <thrust/system/cuda/detail/cross_system.h>

namespace thrust
{

template <typename DerivedPolicy, typename InputIt, typename OutputIt>
__host__ __device__ OutputIt
copy(const thrust::detail::execution_policy_base<DerivedPolicy> &exec,
     InputIt                                                     first,
     InputIt                                                     last,
     OutputIt                                                    result);

template <class DerivedPolicy, class InputIt, class Size, class OutputIt>
__host__ __device__ OutputIt
copy_n(const thrust::detail::execution_policy_base<DerivedPolicy> &exec,
       InputIt                                                     first,
       Size                                                        n,
       OutputIt                                                    result);

namespace cuda_cub {

// D->D copy requires NVCC compiler
template <class System,
          class InputIterator,
          class OutputIterator>
OutputIterator __host__ __device__
copy(execution_policy<System> &system,
     InputIterator             first,
     InputIterator             last,
     OutputIterator            result);

template <class System1,
          class System2,
          class InputIterator,
          class OutputIterator>
OutputIterator __host__
copy(cross_system<System1, System2> systems,
     InputIterator  first,
     InputIterator  last,
     OutputIterator result);

template <class System,
          class InputIterator,
          class Size,
          class OutputIterator>
OutputIterator __host__ __device__
copy_n(execution_policy<System> &system,
       InputIterator             first,
       Size                      n,
       OutputIterator            result);

template <class System1,
          class System2,
          class InputIterator,
          class Size,
          class OutputIterator>
OutputIterator __host__
copy_n(cross_system<System1, System2> systems,
       InputIterator  first,
       Size           n,
       OutputIterator result);

}    // namespace cuda_
} // end namespace thrust



#include <thrust/system/cuda/detail/internal/copy_device_to_device.h>
#include <thrust/system/cuda/detail/internal/copy_cross_system.h>
#include <thrust/system/cuda/detail/par_to_seq.h>

namespace thrust
{
namespace cuda_cub {


#if THRUST_DEVICE_COMPILER == THRUST_DEVICE_COMPILER_NVCC
// D->D copy requires NVCC compiler

__thrust_exec_check_disable__
template <class System,
          class InputIterator,
          class OutputIterator>
OutputIterator __host__ __device__
copy(execution_policy<System> &system,
     InputIterator             first,
     InputIterator             last,
     OutputIterator            result)
{
  OutputIterator ret = result;
  if (__THRUST_HAS_CUDART__)
  {
    ret = __copy::device_to_device(system, first, last, result);
  }
  else
  {
#if !__THRUST_HAS_CUDART__
    ret = thrust::copy(cvt_to_seq(derived_cast(system)),
                       first,
                       last,
                       result);
#endif
  }

  return ret;
}    // end copy()

__thrust_exec_check_disable__
template <class System,
          class InputIterator,
          class Size,
          class OutputIterator>
OutputIterator __host__ __device__
copy_n(execution_policy<System> &system,
       InputIterator             first,
       Size                      n,
       OutputIterator            result)
{
  OutputIterator ret = result;
  if (__THRUST_HAS_CUDART__)
  {
    ret = __copy::device_to_device(system, first, first + n, result);
  }
  else
  {
#if !__THRUST_HAS_CUDART__
    ret = thrust::copy_n(cvt_to_seq(derived_cast(system)), first, n, result);
#endif
  }

  return ret;
} // end copy_n()
#endif

template <class System1,
          class System2,
          class InputIterator,
          class OutputIterator>
OutputIterator __host__
copy(cross_system<System1, System2> systems,
     InputIterator  first,
     InputIterator  last,
     OutputIterator result)
{
  return __copy::cross_system_copy(systems,first,last,result);
} // end copy()

template <class System1,
          class System2,
          class InputIterator,
          class Size,
          class OutputIterator>
OutputIterator __host__
copy_n(cross_system<System1, System2> systems,
       InputIterator  first,
       Size           n,
       OutputIterator result)
{
  return __copy::cross_system_copy_n(systems, first, n, result);
} // end copy_n()


}    // namespace cuda_cub
} // end namespace thrust

#include <thrust/memory.h>
#include <thrust/detail/temporary_array.h>
