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273 lines
10 KiB
273 lines
10 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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/*! \file uninitialized_fill.h |
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* \brief Copy construction into a range of uninitialized elements from a source value |
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*/ |
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#pragma once |
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#include <thrust/detail/config.h> |
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#include <thrust/detail/execution_policy.h> |
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namespace thrust |
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{ |
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/*! \addtogroup filling |
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* \ingroup transformations |
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* \{ |
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*/ |
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/*! In \c thrust, the function \c thrust::device_new allocates memory for |
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* an object and then creates an object at that location by calling a |
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* constructor. Occasionally, however, it is useful to separate those two |
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* operations. If each iterator in the range <tt>[first, last)</tt> points |
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* to unitialized memory, then \p unitialized_fill creates copies of \c x |
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* in that range. That is, for each iterator \c i in the range <tt>[first, last)</tt>, |
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* \p uninitialized_fill creates a copy of \c x in the location pointed to \c i by |
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* calling \p ForwardIterator's \c value_type's copy constructor. |
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* |
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* The algorithm's execution is parallelized as determined by \p exec. |
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* |
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* \param exec The execution policy to use for parallelization. |
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* \param first The first element of the range of interest. |
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* \param last The last element of the range of interest. |
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* \param x The value to use as the exemplar of the copy constructor. |
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* |
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* \tparam DerivedPolicy The name of the derived execution policy. |
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* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator">Forward Iterator</a>, |
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* \p ForwardIterator is mutable, and \p ForwardIterator's \c value_type has a constructor that |
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* takes a single argument of type \p T. |
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* |
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* The following code snippet demonstrates how to use \p uninitialized_fill to initialize a range of |
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* uninitialized memory using the \p thrust::device execution policy for parallelization: |
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* |
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* \code |
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* #include <thrust/uninitialized_fill.h> |
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* #include <thrust/device_malloc.h> |
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* #include <thrust/execution_policy.h> |
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* |
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* struct Int |
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* { |
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* __host__ __device__ |
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* Int(int x) : val(x) {} |
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* int val; |
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* }; |
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* ... |
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* const int N = 137; |
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* |
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* Int val(46); |
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* thrust::device_ptr<Int> array = thrust::device_malloc<Int>(N); |
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* thrust::uninitialized_fill(thrust::device, array, array + N, val); |
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* |
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* // Int x = array[i]; |
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* // x.val == 46 for all 0 <= i < N |
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* \endcode |
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* |
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* \see http://www.sgi.com/tech/stl/uninitialized_fill.html |
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* \see \c uninitialized_fill_n |
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* \see \c fill |
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* \see \c uninitialized_copy |
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* \see \c device_new |
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* \see \c device_malloc |
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*/ |
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template<typename DerivedPolicy, typename ForwardIterator, typename T> |
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void uninitialized_fill(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
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ForwardIterator first, |
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ForwardIterator last, |
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const T &x); |
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/*! In \c thrust, the function \c thrust::device_new allocates memory for |
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* an object and then creates an object at that location by calling a |
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* constructor. Occasionally, however, it is useful to separate those two |
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* operations. If each iterator in the range <tt>[first, last)</tt> points |
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* to unitialized memory, then \p unitialized_fill creates copies of \c x |
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* in that range. That is, for each iterator \c i in the range <tt>[first, last)</tt>, |
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* \p uninitialized_fill creates a copy of \c x in the location pointed to \c i by |
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* calling \p ForwardIterator's \c value_type's copy constructor. |
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* |
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* \param first The first element of the range of interest. |
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* \param last The last element of the range of interest. |
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* \param x The value to use as the exemplar of the copy constructor. |
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* |
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* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator">Forward Iterator</a>, |
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* \p ForwardIterator is mutable, and \p ForwardIterator's \c value_type has a constructor that |
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* takes a single argument of type \p T. |
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* |
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* The following code snippet demonstrates how to use \p uninitialized_fill to initialize a range of |
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* uninitialized memory. |
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* |
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* \code |
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* #include <thrust/uninitialized_fill.h> |
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* #include <thrust/device_malloc.h> |
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* |
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* struct Int |
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* { |
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* __host__ __device__ |
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* Int(int x) : val(x) {} |
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* int val; |
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* }; |
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* ... |
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* const int N = 137; |
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* |
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* Int val(46); |
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* thrust::device_ptr<Int> array = thrust::device_malloc<Int>(N); |
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* thrust::uninitialized_fill(array, array + N, val); |
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* |
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* // Int x = array[i]; |
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* // x.val == 46 for all 0 <= i < N |
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* \endcode |
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* |
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* \see http://www.sgi.com/tech/stl/uninitialized_fill.html |
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* \see \c uninitialized_fill_n |
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* \see \c fill |
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* \see \c uninitialized_copy |
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* \see \c device_new |
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* \see \c device_malloc |
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*/ |
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template<typename ForwardIterator, typename T> |
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void uninitialized_fill(ForwardIterator first, |
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ForwardIterator last, |
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const T &x); |
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/*! In \c thrust, the function \c thrust::device_new allocates memory for |
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* an object and then creates an object at that location by calling a |
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* constructor. Occasionally, however, it is useful to separate those two |
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* operations. If each iterator in the range <tt>[first, first+n)</tt> points |
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* to unitialized memory, then \p unitialized_fill creates copies of \c x |
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* in that range. That is, for each iterator \c i in the range <tt>[first, first+n)</tt>, |
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* \p uninitialized_fill creates a copy of \c x in the location pointed to \c i by |
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* calling \p ForwardIterator's \c value_type's copy constructor. |
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* |
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* The algorithm's execution is parallelized as determined by \p exec. |
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* |
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* \param exec The execution policy to use for parallelization. |
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* \param first The first element of the range of interest. |
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* \param n The size of the range of interest. |
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* \param x The value to use as the exemplar of the copy constructor. |
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* \return <tt>first+n</tt> |
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* |
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* \tparam DerivedPolicy The name of the derived execution policy. |
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* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator">Forward Iterator</a>, |
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* \p ForwardIterator is mutable, and \p ForwardIterator's \c value_type has a constructor that |
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* takes a single argument of type \p T. |
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* |
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* The following code snippet demonstrates how to use \p uninitialized_fill to initialize a range of |
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* uninitialized memory using the \p thrust::device execution policy for parallelization: |
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* |
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* \code |
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* #include <thrust/uninitialized_fill.h> |
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* #include <thrust/device_malloc.h> |
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* #include <thrust/execution_policy.h> |
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* |
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* struct Int |
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* { |
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* __host__ __device__ |
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* Int(int x) : val(x) {} |
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* int val; |
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* }; |
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* ... |
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* const int N = 137; |
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* |
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* Int val(46); |
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* thrust::device_ptr<Int> array = thrust::device_malloc<Int>(N); |
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* thrust::uninitialized_fill_n(thrust::device, array, N, val); |
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* |
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* // Int x = array[i]; |
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* // x.val == 46 for all 0 <= i < N |
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* \endcode |
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* |
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* \see http://www.sgi.com/tech/stl/uninitialized_fill.html |
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* \see \c uninitialized_fill |
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* \see \c fill |
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* \see \c uninitialized_copy_n |
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* \see \c device_new |
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* \see \c device_malloc |
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*/ |
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template<typename DerivedPolicy, typename ForwardIterator, typename Size, typename T> |
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ForwardIterator uninitialized_fill_n(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, |
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ForwardIterator first, |
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Size n, |
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const T &x); |
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/*! In \c thrust, the function \c thrust::device_new allocates memory for |
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* an object and then creates an object at that location by calling a |
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* constructor. Occasionally, however, it is useful to separate those two |
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* operations. If each iterator in the range <tt>[first, first+n)</tt> points |
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* to unitialized memory, then \p unitialized_fill creates copies of \c x |
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* in that range. That is, for each iterator \c i in the range <tt>[first, first+n)</tt>, |
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* \p uninitialized_fill creates a copy of \c x in the location pointed to \c i by |
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* calling \p ForwardIterator's \c value_type's copy constructor. |
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* |
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* \param first The first element of the range of interest. |
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* \param n The size of the range of interest. |
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* \param x The value to use as the exemplar of the copy constructor. |
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* \return <tt>first+n</tt> |
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* |
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* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator">Forward Iterator</a>, |
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* \p ForwardIterator is mutable, and \p ForwardIterator's \c value_type has a constructor that |
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* takes a single argument of type \p T. |
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* |
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* The following code snippet demonstrates how to use \p uninitialized_fill to initialize a range of |
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* uninitialized memory. |
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* |
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* \code |
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* #include <thrust/uninitialized_fill.h> |
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* #include <thrust/device_malloc.h> |
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* |
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* struct Int |
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* { |
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* __host__ __device__ |
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* Int(int x) : val(x) {} |
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* int val; |
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* }; |
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* ... |
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* const int N = 137; |
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* |
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* Int val(46); |
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* thrust::device_ptr<Int> array = thrust::device_malloc<Int>(N); |
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* thrust::uninitialized_fill_n(array, N, val); |
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* |
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* // Int x = array[i]; |
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* // x.val == 46 for all 0 <= i < N |
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* \endcode |
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* |
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* \see http://www.sgi.com/tech/stl/uninitialized_fill.html |
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* \see \c uninitialized_fill |
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* \see \c fill |
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* \see \c uninitialized_copy_n |
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* \see \c device_new |
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* \see \c device_malloc |
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*/ |
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template<typename ForwardIterator, typename Size, typename T> |
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ForwardIterator uninitialized_fill_n(ForwardIterator first, |
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Size n, |
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const T &x); |
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/*! \} // end filling |
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* \} // transformations |
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*/ |
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} // end thrust |
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#include <thrust/detail/uninitialized_fill.inl> |
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