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/*
* Copyright 2008-2013 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 <thrust/detail/config.h>
#include <thrust/detail/static_assert.h>
#include <thrust/system/detail/generic/scan.h>
#include <thrust/iterator/iterator_traits.h>
#include <thrust/scan.h>
#include <thrust/detail/type_traits.h>
#include <thrust/detail/type_traits/iterator/is_output_iterator.h>
#include <thrust/functional.h>
THRUST_NAMESPACE_BEGIN
namespace system
{
namespace detail
{
namespace generic
{
template<typename ExecutionPolicy,
typename InputIterator,
typename OutputIterator>
__host__ __device__
OutputIterator inclusive_scan(thrust::execution_policy<ExecutionPolicy> &exec,
InputIterator first,
InputIterator last,
OutputIterator result)
{
// assume plus as the associative operator
return thrust::inclusive_scan(exec, first, last, result, thrust::plus<>());
} // end inclusive_scan()
template<typename ExecutionPolicy,
typename InputIterator,
typename OutputIterator>
__host__ __device__
OutputIterator exclusive_scan(thrust::execution_policy<ExecutionPolicy> &exec,
InputIterator first,
InputIterator last,
OutputIterator result)
{
// Use the input iterator's value type per https://wg21.link/P0571
using ValueType = typename thrust::iterator_value<InputIterator>::type;
return thrust::exclusive_scan(exec, first, last, result, ValueType{});
} // end exclusive_scan()
template<typename ExecutionPolicy,
typename InputIterator,
typename OutputIterator,
typename T>
__host__ __device__
OutputIterator exclusive_scan(thrust::execution_policy<ExecutionPolicy> &exec,
InputIterator first,
InputIterator last,
OutputIterator result,
T init)
{
// assume plus as the associative operator
return thrust::exclusive_scan(exec, first, last, result, init, thrust::plus<>());
} // end exclusive_scan()
template<typename ExecutionPolicy,
typename InputIterator,
typename OutputIterator,
typename BinaryFunction>
__host__ __device__
OutputIterator inclusive_scan(thrust::execution_policy<ExecutionPolicy> &,
InputIterator,
InputIterator,
OutputIterator result,
BinaryFunction)
{
THRUST_STATIC_ASSERT_MSG(
(thrust::detail::depend_on_instantiation<InputIterator, false>::value)
, "unimplemented for this system"
);
return result;
} // end inclusive_scan
template<typename ExecutionPolicy,
typename InputIterator,
typename OutputIterator,
typename T,
typename BinaryFunction>
__host__ __device__
OutputIterator exclusive_scan(thrust::execution_policy<ExecutionPolicy> &,
InputIterator,
InputIterator,
OutputIterator result,
T,
BinaryFunction)
{
THRUST_STATIC_ASSERT_MSG(
(thrust::detail::depend_on_instantiation<InputIterator, false>::value)
, "unimplemented for this system"
);
return result;
} // end exclusive_scan()
} // end namespace generic
} // end namespace detail
} // end namespace system
THRUST_NAMESPACE_END
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