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212 lines
7.9 KiB
212 lines
7.9 KiB
11 years ago
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/*
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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 generate.h
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* \brief Fills a range with values "generated" from a function of no arguments
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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 transformations
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* \{
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*/
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/*! \p generate assigns the result of invoking \p gen, a function object that takes no arguments,
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* to each element in the range <tt>[first,last)</tt>.
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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 in the range of interest.
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* \param last The last element in the range of interest.
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* \param gen A function argument, taking no parameters, used to generate values to assign to
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* elements in the range <tt>[first,last)</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.html">Forward Iterator</a>,
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* and \p ForwardIterator is mutable.
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* \tparam Generator is a model of <a href="http://www.sgi.com/tech/stl/Generator.html">Generator</a>,
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* and \p Generator's \c result_type is convertible to \p ForwardIterator's \c value_type.
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*
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* The following code snippet demonstrates how to fill a \c host_vector with random numbers,
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* using the standard C library function \c rand using the \p thrust::host execution policy for parallelization:
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*
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* \code
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* #include <thrust/generate.h>
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* #include <thrust/host_vector.h>
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* #include <thrust/execution_policy.h>
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* #include <cstdlib>
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* ...
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* thrust::host_vector<int> v(10);
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* srand(13);
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* thrust::generate(thrust::host, v.begin(), v.end(), rand);
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*
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* // the elements of v are now pseudo-random numbers
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* \endcode
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*
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* \see generate_n
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* \see http://www.sgi.com/tech/stl/generate.html
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*/
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template<typename DerivedPolicy,
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typename ForwardIterator,
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typename Generator>
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void generate(const thrust::detail::execution_policy_base<DerivedPolicy> &exec,
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ForwardIterator first,
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ForwardIterator last,
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Generator gen);
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/*! \p generate assigns the result of invoking \p gen, a function object that takes no arguments,
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* to each element in the range <tt>[first,last)</tt>.
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*
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* \param first The first element in the range of interest.
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* \param last The last element in the range of interest.
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* \param gen A function argument, taking no parameters, used to generate values to assign to
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* elements in the range <tt>[first,last)</tt>.
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*
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* \tparam ForwardIterator is a model of <a href="http://www.sgi.com/tech/stl/ForwardIterator.html">Forward Iterator</a>,
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* and \p ForwardIterator is mutable.
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* \tparam Generator is a model of <a href="http://www.sgi.com/tech/stl/Generator.html">Generator</a>,
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* and \p Generator's \c result_type is convertible to \p ForwardIterator's \c value_type.
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*
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* The following code snippet demonstrates how to fill a \c host_vector with random numbers,
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* using the standard C library function \c rand.
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*
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* \code
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* #include <thrust/generate.h>
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* #include <thrust/host_vector.h>
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* #include <thrust/execution_policy.h>
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* #include <cstdlib>
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* ...
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* thrust::host_vector<int> v(10);
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* srand(13);
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* thrust::generate(v.begin(), v.end(), rand);
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*
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* // the elements of v are now pseudo-random numbers
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* \endcode
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*
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* \see generate_n
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* \see http://www.sgi.com/tech/stl/generate.html
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*/
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template<typename ForwardIterator,
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typename Generator>
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void generate(ForwardIterator first,
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ForwardIterator last,
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Generator gen);
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/*! \p generate_n assigns the result of invoking \p gen, a function object that takes no arguments,
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* to each element in the range <tt>[first,first + n)</tt>. The return value is <tt>first + n</tt>.
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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 in the range of interest.
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* \param n The size of the range of interest.
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* \param gen A function argument, taking no parameters, used to generate values to assign to
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* elements in the range <tt>[first,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 OutputIterator is a model of <a href="http://www.sgi.com/tech/stl/OutputIterator.html">Output Iterator</a>.
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* \tparam Size is an integral type (either signed or unsigned).
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* \tparam Generator is a model of <a href="http://www.sgi.com/tech/stl/Generator.html">Generator</a>,
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* and \p Generator's \c result_type is convertible to a type in \p OutputIterator's set of \c value_types.
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*
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* The following code snippet demonstrates how to fill a \c host_vector with random numbers,
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* using the standard C library function \c rand using the \p thrust::host execution policy for parallelization:
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*
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* \code
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* #include <thrust/generate.h>
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* #include <thrust/host_vector.h>
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* #include <thrust/execution_policy.h>
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* #include <cstdlib>
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* ...
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* thrust::host_vector<int> v(10);
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* srand(13);
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* thrust::generate_n(thrust::host, v.begin(), 10, rand);
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*
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* // the elements of v are now pseudo-random numbers
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* \endcode
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*
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* \see generate
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* \see http://www.sgi.com/tech/stl/generate.html
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*/
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template<typename DerivedPolicy,
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typename OutputIterator,
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typename Size,
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typename Generator>
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OutputIterator generate_n(const thrust::detail::execution_policy_base<DerivedPolicy> &exec,
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OutputIterator first,
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Size n,
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Generator gen);
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/*! \p generate_n assigns the result of invoking \p gen, a function object that takes no arguments,
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* to each element in the range <tt>[first,first + n)</tt>. The return value is <tt>first + n</tt>.
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*
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* \param first The first element in the range of interest.
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* \param n The size of the range of interest.
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* \param gen A function argument, taking no parameters, used to generate values to assign to
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* elements in the range <tt>[first,first + n)</tt>.
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*
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* \tparam OutputIterator is a model of <a href="http://www.sgi.com/tech/stl/OutputIterator.html">Output Iterator</a>.
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* \tparam Size is an integral type (either signed or unsigned).
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* \tparam Generator is a model of <a href="http://www.sgi.com/tech/stl/Generator.html">Generator</a>,
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* and \p Generator's \c result_type is convertible to a type in \p OutputIterator's set of \c value_types.
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*
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* The following code snippet demonstrates how to fill a \c host_vector with random numbers,
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* using the standard C library function \c rand.
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*
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* \code
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* #include <thrust/generate.h>
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* #include <thrust/host_vector.h>
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* #include <stdlib.h>
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* ...
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* thrust::host_vector<int> v(10);
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* srand(13);
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* thrust::generate_n(v.begin(), 10, rand);
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*
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* // the elements of v are now pseudo-random numbers
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* \endcode
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*
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* \see generate
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* \see http://www.sgi.com/tech/stl/generate.html
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*/
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template<typename OutputIterator,
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typename Size,
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typename Generator>
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OutputIterator generate_n(OutputIterator first,
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Size n,
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Generator gen);
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/*! \} // end transformations
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*/
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} // end namespace thrust
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#include <thrust/detail/generate.inl>
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