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/******************************************************************************
* Copyright (c) 2016, 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 <thrust/detail/config.h>
#if THRUST_DEVICE_COMPILER == THRUST_DEVICE_COMPILER_NVCC
#include <thrust/system/cuda/detail/util.h>
#include <thrust/system/cuda/detail/parallel_for.h>
#include <thrust/distance.h>
THRUST_NAMESPACE_BEGIN
namespace cuda_cub {
namespace __fill {
// fill functor
template<class Iterator, class T>
struct functor
{
Iterator it;
T value;
THRUST_FUNCTION
functor(Iterator it, T value)
: it(it), value(value) {}
template<class Size>
THRUST_DEVICE_FUNCTION void operator()(Size idx)
{
it[idx] = value;
}
}; // struct functor
} // namespace __fill
template <class Derived, class OutputIterator, class Size, class T>
OutputIterator __host__ __device__
fill_n(execution_policy<Derived>& policy,
OutputIterator first,
Size count,
const T& value)
{
cuda_cub::parallel_for(policy,
__fill::functor<OutputIterator, T>(
first,
value),
count);
cuda_cub::throw_on_error(
cuda_cub::synchronize_optional(policy)
, "fill_n: failed to synchronize"
);
return first + count;
} // func fill_n
template <class Derived, class ForwardIterator, class T>
void __host__ __device__
fill(execution_policy<Derived>& policy,
ForwardIterator first,
ForwardIterator last,
const T& value)
{
cuda_cub::fill_n(policy, first, thrust::distance(first,last), value);
} // func filll
} // namespace cuda_cub
THRUST_NAMESPACE_END
#endif
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