mingw/lib/gcc/mingw32/4.3.3/include/c++/parallel/types.h

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2007, 2008 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 2, 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 // You should have received a copy of the GNU General Public License
  17 // along with this library; see the file COPYING.  If not, write to
  18 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
  19 // MA 02111-1307, USA.
  20
  21 // As a special exception, you may use this file as part of a free
  22 // software library without restriction.  Specifically, if other files
  23 // instantiate templates or use macros or inline functions from this
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  29 // Public License.
  30
  31 /** @file parallel/types.h
  32  *  @brief Basic types and typedefs.
  33  *  This file is a GNU parallel extension to the Standard C++ Library.
  34  */
  35
  36 // Written by Johannes Singler and Felix Putze.
  37
  38 #ifndef _GLIBCXX_PARALLEL_TYPES_H
  39 #define _GLIBCXX_PARALLEL_TYPES_H 1
  40
  41 #include <cstdlib>
  42
  43 namespace __gnu_parallel
  44 {
  45   // Enumerated types.
  46
  47   /// Run-time equivalents for the compile-time tags.
  48   enum _Parallelism
  49     {
  50       /// Not parallel.
  51       sequential,
  52
  53       /// Parallel unbalanced (equal-sized chunks).
  54       parallel_unbalanced,
  55
  56       /// Parallel balanced (work-stealing).
  57       parallel_balanced,
  58
  59       /// Parallel with OpenMP dynamic load-balancing.
  60       parallel_omp_loop,
  61
  62       /// Parallel with OpenMP static load-balancing.
  63       parallel_omp_loop_static,
  64
  65       /// Parallel with OpenMP taskqueue construct.
  66       parallel_taskqueue
  67     };
  68
  69   /// Strategies for run-time algorithm selection:
  70   // force_sequential, force_parallel, heuristic.
  71   enum _AlgorithmStrategy
  72     {
  73       heuristic,
  74       force_sequential,
  75       force_parallel
  76     };
  77
  78   /// Sorting algorithms:
  79   // multi-way mergesort, quicksort, load-balanced quicksort.
  80   enum _SortAlgorithm
  81     {
  82       MWMS,
  83       QS,
  84       QS_BALANCED
  85     };
  86
  87   /// Merging algorithms:
  88   // bubblesort-alike, loser-tree variants, enum sentinel.
  89   enum _MultiwayMergeAlgorithm
  90     {
  91       LOSER_TREE
  92     };
  93
  94   /// Partial sum algorithms: recursive, linear.
  95   enum _PartialSumAlgorithm
  96     {
  97       RECURSIVE,
  98       LINEAR
  99     };
 100
 101   /// Sorting/merging algorithms: sampling, exact.
 102   enum _SplittingAlgorithm
 103     {
 104       SAMPLING,
 105       EXACT
 106     };
 107
 108   /// Find algorithms:
 109   // growing blocks, equal-sized blocks, equal splitting.
 110   enum _FindAlgorithm
 111     {
 112       GROWING_BLOCKS,
 113       CONSTANT_SIZE_BLOCKS,
 114       EQUAL_SPLIT
 115     };
 116
 117   /// Integer Types.
 118   // XXX need to use <cstdint>
 119   /** @brief 16-bit signed integer. */
 120   typedef short int16;
 121
 122   /** @brief 16-bit unsigned integer. */
 123   typedef unsigned short uint16;
 124
 125   /** @brief 32-bit signed integer. */
 126   typedef int int32;
 127
 128   /** @brief 32-bit unsigned integer. */
 129   typedef unsigned int uint32;
 130
 131   /** @brief 64-bit signed integer. */
 132   typedef long long int64;
 133
 134   /** @brief 64-bit unsigned integer. */
 135   typedef unsigned long long uint64;
 136
 137   /**
 138    * @brief Unsigned integer to index elements.
 139    * The total number of elements for each algorithm must fit into this type.
 140    */
 141   typedef uint64 sequence_index_t;
 142
 143   /**
 144    * @brief Unsigned integer to index a thread number.
 145    * The maximum thread number (for each processor) must fit into this type.
 146    */
 147   typedef uint16 thread_index_t;
 148
 149   // XXX atomics interface?
 150   /// Longest compare-and-swappable integer type on this platform.
 151   typedef int64 lcas_t;
 152
 153   // XXX numeric_limits::digits?
 154   /// Number of bits of ::lcas_t.
 155   static const int lcas_t_bits = sizeof(lcas_t) * 8;
 156
 157   /// ::lcas_t with the right half of bits set to 1.
 158   static const lcas_t lcas_t_mask = ((lcas_t(1) << (lcas_t_bits / 2)) - 1);
 159 }
 160
 161 #endif /* _GLIBCXX_TYPES_H */