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138 lines
3.6 KiB
C++
138 lines
3.6 KiB
C++
// -*- C++ -*-
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// Copyright (C) 2007-2016 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the terms
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// of the GNU General Public License as published by the Free Software
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// Foundation; either version 3, or (at your option) any later
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// version.
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/** @file parallel/types.h
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* @brief Basic types and typedefs.
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* This file is a GNU parallel extension to the Standard C++ Library.
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*/
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// Written by Johannes Singler and Felix Putze.
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#ifndef _GLIBCXX_PARALLEL_TYPES_H
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#define _GLIBCXX_PARALLEL_TYPES_H 1
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#include <cstdlib>
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#include <limits>
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#include <tr1/cstdint>
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namespace __gnu_parallel
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{
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// Enumerated types.
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/// Run-time equivalents for the compile-time tags.
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enum _Parallelism
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{
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/// Not parallel.
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sequential,
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/// Parallel unbalanced (equal-sized chunks).
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parallel_unbalanced,
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/// Parallel balanced (work-stealing).
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parallel_balanced,
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/// Parallel with OpenMP dynamic load-balancing.
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parallel_omp_loop,
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/// Parallel with OpenMP static load-balancing.
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parallel_omp_loop_static,
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/// Parallel with OpenMP taskqueue construct.
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parallel_taskqueue
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};
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/// Strategies for run-time algorithm selection:
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// force_sequential, force_parallel, heuristic.
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enum _AlgorithmStrategy
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{
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heuristic,
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force_sequential,
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force_parallel
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};
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/// Sorting algorithms:
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// multi-way mergesort, quicksort, load-balanced quicksort.
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enum _SortAlgorithm
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{
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MWMS,
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QS,
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QS_BALANCED
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};
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/// Merging algorithms:
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// bubblesort-alike, loser-tree variants, enum __sentinel.
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enum _MultiwayMergeAlgorithm
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{
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LOSER_TREE
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};
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/// Partial sum algorithms: recursive, linear.
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enum _PartialSumAlgorithm
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{
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RECURSIVE,
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LINEAR
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};
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/// Sorting/merging algorithms: sampling, __exact.
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enum _SplittingAlgorithm
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{
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SAMPLING,
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EXACT
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};
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/// Find algorithms:
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// growing blocks, equal-sized blocks, equal splitting.
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enum _FindAlgorithm
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{
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GROWING_BLOCKS,
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CONSTANT_SIZE_BLOCKS,
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EQUAL_SPLIT
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};
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/**
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* @brief Unsigned integer to index __elements.
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* The total number of elements for each algorithm must fit into this type.
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*/
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typedef uint64_t _SequenceIndex;
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/**
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* @brief Unsigned integer to index a thread number.
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* The maximum thread number (for each processor) must fit into this type.
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*/
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typedef uint16_t _ThreadIndex;
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// XXX atomics interface?
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/// Longest compare-and-swappable integer type on this platform.
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typedef int64_t _CASable;
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/// Number of bits of _CASable.
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static const int _CASable_bits = std::numeric_limits<_CASable>::digits;
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/// ::_CASable with the right half of bits set to 1.
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static const _CASable _CASable_mask =
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((_CASable(1) << (_CASable_bits / 2)) - 1);
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}
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#endif /* _GLIBCXX_PARALLEL_TYPES_H */
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