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- // -*- C++ -*-
- // Copyright (C) 2007-2022 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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