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ultra_embe |
// -*- C++ -*-
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// Copyright (C) 2007, 2008, 2009, 2010 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 3, 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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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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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 @a 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 _IIter, 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(_IIter __begin, _IIter __end,
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_UserOp __user_op,
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_Functionality& __functionality,
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_Red __reduction,
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_Result __reduction_start,
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_Result& __output, typename
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std::iterator_traits<_IIter>::
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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
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(__begin, __end, __user_op, __functionality, __reduction,
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__reduction_start, __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
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(__begin, __end, __user_op, __functionality, __reduction,
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__reduction_start, __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
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(__begin, __end, __user_op, __functionality, __reduction,
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__reduction_start, __output, __bound);
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else //e. g. parallel_balanced
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return __for_each_template_random_access_workstealing
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(__begin, __end, __user_op, __functionality, __reduction,
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__reduction_start, __output, __bound);
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}
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}
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#endif /* _GLIBCXX_PARALLEL_FOR_EACH_H */
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