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Diffstat (limited to 'libstdc++-v3/include/parallel/for_each.h')
| -rw-r--r-- | libstdc++-v3/include/parallel/for_each.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/libstdc++-v3/include/parallel/for_each.h b/libstdc++-v3/include/parallel/for_each.h new file mode 100644 index 000000000..013259315 --- /dev/null +++ b/libstdc++-v3/include/parallel/for_each.h @@ -0,0 +1,90 @@ +// -*- C++ -*- + +// Copyright (C) 2007, 2008, 2009, 2010 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 */ |