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73 lines
2.3 KiB
73 lines
2.3 KiB
/* |
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* Copyright 2008-2012 NVIDIA Corporation |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#include <thrust/detail/config.h> |
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#include <thrust/system/detail/generic/swap_ranges.h> |
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#include <thrust/tuple.h> |
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#include <thrust/iterator/zip_iterator.h> |
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#include <thrust/detail/internal_functional.h> |
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#include <thrust/for_each.h> |
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namespace thrust |
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{ |
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namespace system |
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{ |
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namespace detail |
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{ |
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namespace generic |
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{ |
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namespace detail |
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{ |
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// XXX define this here rather than in internal_functional.h |
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// to avoid circular dependence between swap.h & internal_functional.h |
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struct swap_pair_elements |
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{ |
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template <typename Tuple> |
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__host__ __device__ |
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void operator()(Tuple t) |
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{ |
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// use unqualified swap to allow ADL to catch any user-defined swap |
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using thrust::swap; |
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swap(thrust::get<0>(t), thrust::get<1>(t)); |
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} |
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}; // end swap_pair_elements |
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} // end detail |
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template<typename DerivedPolicy, |
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typename ForwardIterator1, |
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typename ForwardIterator2> |
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ForwardIterator2 swap_ranges(thrust::execution_policy<DerivedPolicy> &exec, |
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ForwardIterator1 first1, |
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ForwardIterator1 last1, |
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ForwardIterator2 first2) |
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{ |
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typedef thrust::tuple<ForwardIterator1,ForwardIterator2> IteratorTuple; |
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typedef thrust::zip_iterator<IteratorTuple> ZipIterator; |
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ZipIterator result = thrust::for_each(exec, |
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thrust::make_zip_iterator(thrust::make_tuple(first1, first2)), |
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thrust::make_zip_iterator(thrust::make_tuple(last1, first2)), |
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detail::swap_pair_elements()); |
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return thrust::get<1>(result.get_iterator_tuple()); |
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} // end swap_ranges() |
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} // end generic |
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} // end detail |
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} // end system |
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} // end thrust |
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