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Editing: for_each.h
// -*- C++ -*- // Copyright (C) 2007-2018 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the terms // of the GNU General Public License as published by the Free Software // Foundation; either version 3, or (at your option) any later // version. // This library is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. /** @file parallel/for_each.h * @brief Main interface for embarrassingly parallel functions. * * The explicit implementation are in other header files, like * workstealing.h, par_loop.h, omp_loop.h, and omp_loop_static.h. * This file is a GNU parallel extension to the Standard C++ Library. */ // Written by Felix Putze. #ifndef _GLIBCXX_PARALLEL_FOR_EACH_H #define _GLIBCXX_PARALLEL_FOR_EACH_H 1 #include <parallel/settings.h> #include <parallel/par_loop.h> #include <parallel/omp_loop.h> #include <parallel/workstealing.h> namespace __gnu_parallel { /** @brief Chose the desired algorithm by evaluating @c __parallelism_tag. * @param __begin Begin iterator of input sequence. * @param __end End iterator of input sequence. * @param __user_op A user-specified functor (comparator, predicate, * associative operator,...) * @param __functionality functor to @a process an element with * __user_op (depends on desired functionality, e. g. accumulate, * for_each,... * @param __reduction Reduction functor. * @param __reduction_start Initial value for reduction. * @param __output Output iterator. * @param __bound Maximum number of elements processed. * @param __parallelism_tag Parallelization method */ template<typename _IIter, typename _UserOp, typename _Functionality, typename _Red, typename _Result> _UserOp __for_each_template_random_access(_IIter __begin, _IIter __end, _UserOp __user_op, _Functionality& __functionality, _Red __reduction, _Result __reduction_start, _Result& __output, typename std::iterator_traits<_IIter>:: difference_type __bound, _Parallelism __parallelism_tag) { if (__parallelism_tag == parallel_unbalanced) return __for_each_template_random_access_ed (__begin, __end, __user_op, __functionality, __reduction, __reduction_start, __output, __bound); else if (__parallelism_tag == parallel_omp_loop) return __for_each_template_random_access_omp_loop (__begin, __end, __user_op, __functionality, __reduction, __reduction_start, __output, __bound); else if (__parallelism_tag == parallel_omp_loop_static) return __for_each_template_random_access_omp_loop (__begin, __end, __user_op, __functionality, __reduction, __reduction_start, __output, __bound); else //e. g. parallel_balanced return __for_each_template_random_access_workstealing (__begin, __end, __user_op, __functionality, __reduction, __reduction_start, __output, __bound); } } #endif /* _GLIBCXX_PARALLEL_FOR_EACH_H */
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