1 |
424 |
jeremybenn |
// -*- C++ -*-
|
2 |
|
|
|
3 |
|
|
// Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
|
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
|
8 |
|
|
// Foundation; either version 3, or (at your option) any later
|
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 |
|
|
|
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/>.
|
24 |
|
|
|
25 |
|
|
/**
|
26 |
|
|
* @file parallel/tags.h
|
27 |
|
|
* @brief Tags for compile-time selection.
|
28 |
|
|
* This file is a GNU parallel extension to the Standard C++ Library.
|
29 |
|
|
*/
|
30 |
|
|
|
31 |
|
|
// Written by Johannes Singler and Felix Putze.
|
32 |
|
|
|
33 |
|
|
#ifndef _GLIBCXX_PARALLEL_TAGS_H
|
34 |
|
|
#define _GLIBCXX_PARALLEL_TAGS_H 1
|
35 |
|
|
|
36 |
|
|
#include <omp.h>
|
37 |
|
|
#include <parallel/types.h>
|
38 |
|
|
|
39 |
|
|
namespace __gnu_parallel
|
40 |
|
|
{
|
41 |
|
|
/** @brief Forces sequential execution at compile time. */
|
42 |
|
|
struct sequential_tag { };
|
43 |
|
|
|
44 |
|
|
/** @brief Recommends parallel execution at compile time,
|
45 |
|
|
* optionally using a user-specified number of threads. */
|
46 |
|
|
struct parallel_tag
|
47 |
|
|
{
|
48 |
|
|
private:
|
49 |
|
|
_ThreadIndex _M_num_threads;
|
50 |
|
|
|
51 |
|
|
public:
|
52 |
|
|
/** @brief Default constructor. Use default number of threads. */
|
53 |
|
|
parallel_tag()
|
54 |
|
|
{ _M_num_threads = 0; }
|
55 |
|
|
|
56 |
|
|
/** @brief Default constructor. Recommend number of threads to use.
|
57 |
|
|
* @param __num_threads Desired number of threads. */
|
58 |
|
|
parallel_tag(_ThreadIndex __num_threads)
|
59 |
|
|
{ _M_num_threads = __num_threads; }
|
60 |
|
|
|
61 |
|
|
/** @brief Find out desired number of threads.
|
62 |
|
|
* @return Desired number of threads. */
|
63 |
|
|
_ThreadIndex __get_num_threads()
|
64 |
|
|
{
|
65 |
|
|
if(_M_num_threads == 0)
|
66 |
|
|
return omp_get_max_threads();
|
67 |
|
|
else
|
68 |
|
|
return _M_num_threads;
|
69 |
|
|
}
|
70 |
|
|
|
71 |
|
|
/** @brief Set the desired number of threads.
|
72 |
|
|
* @param __num_threads Desired number of threads. */
|
73 |
|
|
void set_num_threads(_ThreadIndex __num_threads)
|
74 |
|
|
{ _M_num_threads = __num_threads; }
|
75 |
|
|
};
|
76 |
|
|
|
77 |
|
|
/** @brief Recommends parallel execution using the
|
78 |
|
|
default parallel algorithm. */
|
79 |
|
|
struct default_parallel_tag : public parallel_tag
|
80 |
|
|
{
|
81 |
|
|
default_parallel_tag() { }
|
82 |
|
|
default_parallel_tag(_ThreadIndex __num_threads)
|
83 |
|
|
: parallel_tag(__num_threads) { }
|
84 |
|
|
};
|
85 |
|
|
|
86 |
|
|
/** @brief Recommends parallel execution using dynamic
|
87 |
|
|
load-balancing at compile time. */
|
88 |
|
|
struct balanced_tag : public parallel_tag { };
|
89 |
|
|
|
90 |
|
|
/** @brief Recommends parallel execution using static
|
91 |
|
|
load-balancing at compile time. */
|
92 |
|
|
struct unbalanced_tag : public parallel_tag { };
|
93 |
|
|
|
94 |
|
|
/** @brief Recommends parallel execution using OpenMP dynamic
|
95 |
|
|
load-balancing at compile time. */
|
96 |
|
|
struct omp_loop_tag : public parallel_tag { };
|
97 |
|
|
|
98 |
|
|
/** @brief Recommends parallel execution using OpenMP static
|
99 |
|
|
load-balancing at compile time. */
|
100 |
|
|
struct omp_loop_static_tag : public parallel_tag { };
|
101 |
|
|
|
102 |
|
|
|
103 |
|
|
/** @brief Base class for for std::find() variants. */
|
104 |
|
|
struct find_tag { };
|
105 |
|
|
|
106 |
|
|
|
107 |
|
|
/** @brief Forces parallel merging
|
108 |
|
|
* with exact splitting, at compile time. */
|
109 |
|
|
struct exact_tag : public parallel_tag
|
110 |
|
|
{
|
111 |
|
|
exact_tag() { }
|
112 |
|
|
exact_tag(_ThreadIndex __num_threads)
|
113 |
|
|
: parallel_tag(__num_threads) { }
|
114 |
|
|
};
|
115 |
|
|
|
116 |
|
|
/** @brief Forces parallel merging
|
117 |
|
|
* with exact splitting, at compile time. */
|
118 |
|
|
struct sampling_tag : public parallel_tag
|
119 |
|
|
{
|
120 |
|
|
sampling_tag() { }
|
121 |
|
|
sampling_tag(_ThreadIndex __num_threads)
|
122 |
|
|
: parallel_tag(__num_threads) { }
|
123 |
|
|
};
|
124 |
|
|
|
125 |
|
|
|
126 |
|
|
/** @brief Forces parallel sorting using multiway mergesort
|
127 |
|
|
* at compile time. */
|
128 |
|
|
struct multiway_mergesort_tag : public parallel_tag
|
129 |
|
|
{
|
130 |
|
|
multiway_mergesort_tag() { }
|
131 |
|
|
multiway_mergesort_tag(_ThreadIndex __num_threads)
|
132 |
|
|
: parallel_tag(__num_threads) { }
|
133 |
|
|
};
|
134 |
|
|
|
135 |
|
|
/** @brief Forces parallel sorting using multiway mergesort
|
136 |
|
|
* with exact splitting at compile time. */
|
137 |
|
|
struct multiway_mergesort_exact_tag : public parallel_tag
|
138 |
|
|
{
|
139 |
|
|
multiway_mergesort_exact_tag() { }
|
140 |
|
|
multiway_mergesort_exact_tag(_ThreadIndex __num_threads)
|
141 |
|
|
: parallel_tag(__num_threads) { }
|
142 |
|
|
};
|
143 |
|
|
|
144 |
|
|
/** @brief Forces parallel sorting using multiway mergesort
|
145 |
|
|
* with splitting by sampling at compile time. */
|
146 |
|
|
struct multiway_mergesort_sampling_tag : public parallel_tag
|
147 |
|
|
{
|
148 |
|
|
multiway_mergesort_sampling_tag() { }
|
149 |
|
|
multiway_mergesort_sampling_tag(_ThreadIndex __num_threads)
|
150 |
|
|
: parallel_tag(__num_threads) { }
|
151 |
|
|
};
|
152 |
|
|
|
153 |
|
|
/** @brief Forces parallel sorting using unbalanced quicksort
|
154 |
|
|
* at compile time. */
|
155 |
|
|
struct quicksort_tag : public parallel_tag
|
156 |
|
|
{
|
157 |
|
|
quicksort_tag() { }
|
158 |
|
|
quicksort_tag(_ThreadIndex __num_threads)
|
159 |
|
|
: parallel_tag(__num_threads) { }
|
160 |
|
|
};
|
161 |
|
|
|
162 |
|
|
/** @brief Forces parallel sorting using balanced quicksort
|
163 |
|
|
* at compile time. */
|
164 |
|
|
struct balanced_quicksort_tag : public parallel_tag
|
165 |
|
|
{
|
166 |
|
|
balanced_quicksort_tag() { }
|
167 |
|
|
balanced_quicksort_tag(_ThreadIndex __num_threads)
|
168 |
|
|
: parallel_tag(__num_threads) { }
|
169 |
|
|
};
|
170 |
|
|
|
171 |
|
|
|
172 |
|
|
/** @brief Selects the growing block size variant for std::find().
|
173 |
|
|
@see _GLIBCXX_FIND_GROWING_BLOCKS */
|
174 |
|
|
struct growing_blocks_tag : public find_tag { };
|
175 |
|
|
|
176 |
|
|
/** @brief Selects the constant block size variant for std::find().
|
177 |
|
|
@see _GLIBCXX_FIND_CONSTANT_SIZE_BLOCKS */
|
178 |
|
|
struct constant_size_blocks_tag : public find_tag { };
|
179 |
|
|
|
180 |
|
|
/** @brief Selects the equal splitting variant for std::find().
|
181 |
|
|
@see _GLIBCXX_FIND_EQUAL_SPLIT */
|
182 |
|
|
struct equal_split_tag : public find_tag { };
|
183 |
|
|
}
|
184 |
|
|
|
185 |
|
|
#endif /* _GLIBCXX_PARALLEL_TAGS_H */
|