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59 lines
2.0 KiB
59 lines
2.0 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/tabulate.h> |
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#include <thrust/iterator/iterator_traits.h> |
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#include <thrust/transform.h> |
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#include <thrust/distance.h> |
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#include <thrust/iterator/counting_iterator.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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template<typename DerivedPolicy, |
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typename ForwardIterator, |
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typename UnaryOperation> |
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void tabulate(thrust::execution_policy<DerivedPolicy> &exec, |
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ForwardIterator first, |
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ForwardIterator last, |
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UnaryOperation unary_op) |
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{ |
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typedef typename iterator_difference<ForwardIterator>::type difference_type; |
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// by default, counting_iterator uses a 64b difference_type on 32b platforms to avoid overflowing its counter. |
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// this causes problems when a zip_iterator is created in transform's implementation -- ForwardIterator is |
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// incremented by a 64b difference_type and some compilers warn |
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// to avoid this, specify the counting_iterator's difference_type to be the same as ForwardIterator's. |
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thrust::counting_iterator<difference_type, thrust::use_default, thrust::use_default, difference_type> iter(0); |
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thrust::transform(exec, iter, iter + thrust::distance(first, last), first, unary_op); |
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} // end tabulate() |
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} // end namespace generic |
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} // end namespace detail |
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} // end namespace system |
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} // end namespace thrust |
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