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1 | // -*- C++ -*- |
2 | ||
99dee823 | 3 | // Copyright (C) 2007-2021 Free Software Foundation, Inc. |
c2ba9709 JS |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the terms | |
7 | // of the GNU General Public License as published by the Free Software | |
748086b7 | 8 | // Foundation; either version 3, or (at your option) any later |
c2ba9709 JS |
9 | // version. |
10 | ||
11 | // This library is distributed in the hope that it will be useful, but | |
12 | // WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | // General Public License for more details. | |
15 | ||
748086b7 JJ |
16 | // Under Section 7 of GPL version 3, you are granted additional |
17 | // permissions described in the GCC Runtime Library Exception, version | |
18 | // 3.1, as published by the Free Software Foundation. | |
19 | ||
20 | // You should have received a copy of the GNU General Public License and | |
21 | // a copy of the GCC Runtime Library Exception along with this program; | |
22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | // <http://www.gnu.org/licenses/>. | |
c2ba9709 JS |
24 | |
25 | /** @file parallel/for_each.h | |
a3e6b31a | 26 | * @brief Main interface for embarrassingly parallel functions. |
c2ba9709 JS |
27 | * |
28 | * The explicit implementation are in other header files, like | |
29 | * workstealing.h, par_loop.h, omp_loop.h, and omp_loop_static.h. | |
30 | * This file is a GNU parallel extension to the Standard C++ Library. | |
31 | */ | |
32 | ||
33 | // Written by Felix Putze. | |
34 | ||
35 | #ifndef _GLIBCXX_PARALLEL_FOR_EACH_H | |
36 | #define _GLIBCXX_PARALLEL_FOR_EACH_H 1 | |
37 | ||
38 | #include <parallel/settings.h> | |
39 | #include <parallel/par_loop.h> | |
40 | #include <parallel/omp_loop.h> | |
41 | #include <parallel/workstealing.h> | |
42 | ||
43 | namespace __gnu_parallel | |
44 | { | |
8e32aa11 | 45 | /** @brief Chose the desired algorithm by evaluating @c __parallelism_tag. |
1acba85b JS |
46 | * @param __begin Begin iterator of input sequence. |
47 | * @param __end End iterator of input sequence. | |
48 | * @param __user_op A user-specified functor (comparator, predicate, | |
c2ba9709 | 49 | * associative operator,...) |
2a60a9f6 | 50 | * @param __functionality functor to @a process an element with |
1acba85b | 51 | * __user_op (depends on desired functionality, e. g. accumulate, |
c2ba9709 | 52 | * for_each,... |
1acba85b JS |
53 | * @param __reduction Reduction functor. |
54 | * @param __reduction_start Initial value for reduction. | |
55 | * @param __output Output iterator. | |
56 | * @param __bound Maximum number of elements processed. | |
57 | * @param __parallelism_tag Parallelization method */ | |
58 | template<typename _IIter, typename _UserOp, | |
15ac3c72 | 59 | typename _Functionality, typename _Red, typename _Result> |
1acba85b JS |
60 | _UserOp |
61 | __for_each_template_random_access(_IIter __begin, _IIter __end, | |
15ac3c72 JS |
62 | _UserOp __user_op, |
63 | _Functionality& __functionality, | |
64 | _Red __reduction, | |
65 | _Result __reduction_start, | |
66 | _Result& __output, typename | |
67 | std::iterator_traits<_IIter>:: | |
68 | difference_type __bound, | |
69 | _Parallelism __parallelism_tag) | |
531898c3 | 70 | { |
1acba85b | 71 | if (__parallelism_tag == parallel_unbalanced) |
77d16198 PC |
72 | return __for_each_template_random_access_ed |
73 | (__begin, __end, __user_op, __functionality, __reduction, | |
74 | __reduction_start, __output, __bound); | |
1acba85b | 75 | else if (__parallelism_tag == parallel_omp_loop) |
77d16198 PC |
76 | return __for_each_template_random_access_omp_loop |
77 | (__begin, __end, __user_op, __functionality, __reduction, | |
78 | __reduction_start, __output, __bound); | |
1acba85b | 79 | else if (__parallelism_tag == parallel_omp_loop_static) |
77d16198 PC |
80 | return __for_each_template_random_access_omp_loop |
81 | (__begin, __end, __user_op, __functionality, __reduction, | |
82 | __reduction_start, __output, __bound); | |
15ac3c72 | 83 | else //e. g. parallel_balanced |
77d16198 PC |
84 | return __for_each_template_random_access_workstealing |
85 | (__begin, __end, __user_op, __functionality, __reduction, | |
86 | __reduction_start, __output, __bound); | |
c2ba9709 JS |
87 | } |
88 | } | |
89 | ||
cbcd1e45 | 90 | #endif /* _GLIBCXX_PARALLEL_FOR_EACH_H */ |