| // -*- C++ -*- |
| |
| // Copyright (C) 2007-2014 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 */ |
