1 // -*- C++ -*- 2 3 // Copyright (C) 2007-2014 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 /** @file parallel/types.h 26 * @brief Basic types and typedefs. 27 * This file is a GNU parallel extension to the Standard C++ Library. 28 */ 29 30 // Written by Johannes Singler and Felix Putze. 31 32 #ifndef _GLIBCXX_PARALLEL_TYPES_H 33 #define _GLIBCXX_PARALLEL_TYPES_H 1 34 35 #include <cstdlib> 36 #include <limits> 37 #include <tr1/cstdint> 38 39 namespace __gnu_parallel 40 { 41 // Enumerated types. 42 43 /// Run-time equivalents for the compile-time tags. 44 enum _Parallelism 45 { 46 /// Not parallel. 47 sequential, 48 49 /// Parallel unbalanced (equal-sized chunks). 50 parallel_unbalanced, 51 52 /// Parallel balanced (work-stealing). 53 parallel_balanced, 54 55 /// Parallel with OpenMP dynamic load-balancing. 56 parallel_omp_loop, 57 58 /// Parallel with OpenMP static load-balancing. 59 parallel_omp_loop_static, 60 61 /// Parallel with OpenMP taskqueue construct. 62 parallel_taskqueue 63 }; 64 65 /// Strategies for run-time algorithm selection: 66 // force_sequential, force_parallel, heuristic. 67 enum _AlgorithmStrategy 68 { 69 heuristic, 70 force_sequential, 71 force_parallel 72 }; 73 74 /// Sorting algorithms: 75 // multi-way mergesort, quicksort, load-balanced quicksort. 76 enum _SortAlgorithm 77 { 78 MWMS, 79 QS, 80 QS_BALANCED 81 }; 82 83 /// Merging algorithms: 84 // bubblesort-alike, loser-tree variants, enum __sentinel. 85 enum _MultiwayMergeAlgorithm 86 { 87 LOSER_TREE 88 }; 89 90 /// Partial sum algorithms: recursive, linear. 91 enum _PartialSumAlgorithm 92 { 93 RECURSIVE, 94 LINEAR 95 }; 96 97 /// Sorting/merging algorithms: sampling, __exact. 98 enum _SplittingAlgorithm 99 { 100 SAMPLING, 101 EXACT 102 }; 103 104 /// Find algorithms: 105 // growing blocks, equal-sized blocks, equal splitting. 106 enum _FindAlgorithm 107 { 108 GROWING_BLOCKS, 109 CONSTANT_SIZE_BLOCKS, 110 EQUAL_SPLIT 111 }; 112 113 /** 114 * @brief Unsigned integer to index __elements. 115 * The total number of elements for each algorithm must fit into this type. 116 */ 117 typedef uint64_t _SequenceIndex; 118 119 /** 120 * @brief Unsigned integer to index a thread number. 121 * The maximum thread number (for each processor) must fit into this type. 122 */ 123 typedef uint16_t _ThreadIndex; 124 125 // XXX atomics interface? 126 /// Longest compare-and-swappable integer type on this platform. 127 typedef int64_t _CASable; 128 129 /// Number of bits of _CASable. 130 static const int _CASable_bits = std::numeric_limits<_CASable>::digits; 131 132 /// ::_CASable with the right half of bits set to 1. 133 static const _CASable _CASable_mask = 134 ((_CASable(1) << (_CASable_bits / 2)) - 1); 135 } 136 137 #endif /* _GLIBCXX_PARALLEL_TYPES_H */ 138