104 lines
3.9 KiB
C++
104 lines
3.9 KiB
C++
// -*- C++ -*-
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// Copyright (C) 2007, 2008 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the terms
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// of the GNU General Public License as published by the Free Software
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// Foundation; either version 2, or (at your option) any later
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// version.
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this library; see the file COPYING. If not, write to
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// the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
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// MA 02111-1307, USA.
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// As a special exception, you may use this file as part of a free
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// software library without restriction. Specifically, if other files
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// instantiate templates or use macros or inline functions from this
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// file, or you compile this file and link it with other files to
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// produce an executable, this file does not by itself cause the
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// resulting executable to be covered by the GNU General Public
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// License. This exception does not however invalidate any other
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// reasons why the executable file might be covered by the GNU General
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// Public License.
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/** @file parallel/for_each.h
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* @brief Main interface for embarrassingly parallel functions.
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*
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* The explicit implementation are in other header files, like
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* workstealing.h, par_loop.h, omp_loop.h, and omp_loop_static.h.
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* This file is a GNU parallel extension to the Standard C++ Library.
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*/
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// Written by Felix Putze.
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#ifndef _GLIBCXX_PARALLEL_FOR_EACH_H
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#define _GLIBCXX_PARALLEL_FOR_EACH_H 1
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#include <parallel/settings.h>
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#include <parallel/par_loop.h>
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#include <parallel/omp_loop.h>
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#include <parallel/workstealing.h>
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namespace __gnu_parallel
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{
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/** @brief Chose the desired algorithm by evaluating @c parallelism_tag.
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* @param begin Begin iterator of input sequence.
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* @param end End iterator of input sequence.
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* @param user_op A user-specified functor (comparator, predicate,
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* associative operator,...)
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* @param functionality functor to "process" an element with
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* user_op (depends on desired functionality, e. g. accumulate,
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* for_each,...
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* @param reduction Reduction functor.
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* @param reduction_start Initial value for reduction.
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* @param output Output iterator.
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* @param bound Maximum number of elements processed.
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* @param parallelism_tag Parallelization method */
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template<typename InputIterator, typename UserOp,
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typename Functionality, typename Red, typename Result>
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UserOp
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for_each_template_random_access(InputIterator begin, InputIterator end,
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UserOp user_op,
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Functionality& functionality,
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Red reduction, Result reduction_start,
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Result& output, typename
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std::iterator_traits<InputIterator>::
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difference_type bound,
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_Parallelism parallelism_tag)
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{
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if (parallelism_tag == parallel_unbalanced)
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return for_each_template_random_access_ed(begin, end, user_op,
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functionality, reduction,
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reduction_start,
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output, bound);
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else if (parallelism_tag == parallel_omp_loop)
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return for_each_template_random_access_omp_loop(begin, end, user_op,
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functionality,
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reduction,
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reduction_start,
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output, bound);
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else if (parallelism_tag == parallel_omp_loop_static)
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return for_each_template_random_access_omp_loop(begin, end, user_op,
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functionality,
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reduction,
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reduction_start,
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output, bound);
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else //e. g. parallel_balanced
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return for_each_template_random_access_workstealing(begin, end,
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user_op,
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functionality,
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reduction,
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reduction_start,
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output, bound);
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}
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}
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#endif /* _GLIBCXX_PARALLEL_FOR_EACH_H */
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