You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
124 lines
4.5 KiB
124 lines
4.5 KiB
/* |
|
* Copyright 2008-2012 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/system/detail/generic/transform_scan.h> |
|
#include <thrust/scan.h> |
|
#include <thrust/iterator/transform_iterator.h> |
|
#include <thrust/detail/type_traits.h> |
|
#include <thrust/detail/type_traits/function_traits.h> |
|
#include <thrust/detail/type_traits/iterator/is_output_iterator.h> |
|
|
|
namespace thrust |
|
{ |
|
namespace system |
|
{ |
|
namespace detail |
|
{ |
|
namespace generic |
|
{ |
|
|
|
template<typename ExecutionPolicy, |
|
typename InputIterator, |
|
typename OutputIterator, |
|
typename UnaryFunction, |
|
typename BinaryFunction> |
|
OutputIterator transform_inclusive_scan(thrust::execution_policy<ExecutionPolicy> &exec, |
|
InputIterator first, |
|
InputIterator last, |
|
OutputIterator result, |
|
UnaryFunction unary_op, |
|
BinaryFunction binary_op) |
|
{ |
|
// the pseudocode for deducing the type of the temporary used below: |
|
// |
|
// if UnaryFunction is AdaptableUnaryFunction |
|
// TemporaryType = AdaptableUnaryFunction::result_type |
|
// else if OutputIterator is a "pure" output iterator |
|
// TemporaryType = InputIterator::value_type |
|
// else |
|
// TemporaryType = OutputIterator::value_type |
|
// |
|
// XXX upon c++0x, TemporaryType needs to be: |
|
// result_of<UnaryFunction>::type |
|
|
|
typedef typename thrust::detail::eval_if< |
|
thrust::detail::has_result_type<UnaryFunction>::value, |
|
thrust::detail::result_type<UnaryFunction>, |
|
thrust::detail::eval_if< |
|
thrust::detail::is_output_iterator<OutputIterator>::value, |
|
thrust::iterator_value<InputIterator>, |
|
thrust::iterator_value<OutputIterator> |
|
> |
|
>::type ValueType; |
|
|
|
thrust::transform_iterator<UnaryFunction, InputIterator, ValueType> _first(first, unary_op); |
|
thrust::transform_iterator<UnaryFunction, InputIterator, ValueType> _last(last, unary_op); |
|
|
|
return thrust::inclusive_scan(exec, _first, _last, result, binary_op); |
|
} // end transform_inclusive_scan() |
|
|
|
template<typename ExecutionPolicy, |
|
typename InputIterator, |
|
typename OutputIterator, |
|
typename UnaryFunction, |
|
typename T, |
|
typename AssociativeOperator> |
|
OutputIterator transform_exclusive_scan(thrust::execution_policy<ExecutionPolicy> &exec, |
|
InputIterator first, |
|
InputIterator last, |
|
OutputIterator result, |
|
UnaryFunction unary_op, |
|
T init, |
|
AssociativeOperator binary_op) |
|
{ |
|
// the pseudocode for deducing the type of the temporary used below: |
|
// |
|
// if UnaryFunction is AdaptableUnaryFunction |
|
// TemporaryType = AdaptableUnaryFunction::result_type |
|
// else if OutputIterator is a "pure" output iterator |
|
// TemporaryType = InputIterator::value_type |
|
// else |
|
// TemporaryType = OutputIterator::value_type |
|
// |
|
// XXX upon c++0x, TemporaryType needs to be: |
|
// result_of<UnaryFunction>::type |
|
|
|
typedef typename thrust::detail::eval_if< |
|
thrust::detail::has_result_type<UnaryFunction>::value, |
|
thrust::detail::result_type<UnaryFunction>, |
|
thrust::detail::eval_if< |
|
thrust::detail::is_output_iterator<OutputIterator>::value, |
|
thrust::iterator_value<InputIterator>, |
|
thrust::iterator_value<OutputIterator> |
|
> |
|
>::type ValueType; |
|
|
|
thrust::transform_iterator<UnaryFunction, InputIterator, ValueType> _first(first, unary_op); |
|
thrust::transform_iterator<UnaryFunction, InputIterator, ValueType> _last(last, unary_op); |
|
|
|
return thrust::exclusive_scan(exec, _first, _last, result, init, binary_op); |
|
} // end transform_exclusive_scan() |
|
|
|
} // end namespace generic |
|
} // end namespace detail |
|
} // end namespace system |
|
} // end namespace thrust |
|
|
|
|
|
|