src/gmxlib/thread_mpi/winthreads.h

   1 /*
   2 This source code file is part of thread_mpi.
   3 Written by Sander Pronk, Erik Lindahl, and possibly others.
   4
   5 Copyright (c) 2009, Sander Pronk, Erik Lindahl.
   6 All rights reserved.
   7
   8 Redistribution and use in source and binary forms, with or without
   9 modification, are permitted provided that the following conditions are met:
  10 1) Redistributions of source code must retain the above copyright
  11    notice, this list of conditions and the following disclaimer.
  12 2) Redistributions in binary form must reproduce the above copyright
  13    notice, this list of conditions and the following disclaimer in the
  14    documentation and/or other materials provided with the distribution.
  15 3) Neither the name of the copyright holders nor the
  16    names of its contributors may be used to endorse or promote products
  17    derived from this software without specific prior written permission.
  18
  19 THIS SOFTWARE IS PROVIDED BY US ''AS IS'' AND ANY
  20 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  21 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  22 DISCLAIMED. IN NO EVENT SHALL WE BE LIABLE FOR ANY
  23 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  24 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  25 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  26 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  28 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29
  30 If you want to redistribute modifications, please consider that
  31 scientific software is very special. Version control is crucial -
  32 bugs must be traceable. We will be happy to consider code for
  33 inclusion in the official distribution, but derived work should not
  34 be called official thread_mpi. Details are found in the README & COPYING
  35 files.
  36 */
  37
  38 /* the types that were defined in include/thread_mpi/threads.h */
  39
  40
  41 struct tMPI_Thread
  42 {
  43     HANDLE th;
  44 };
  45
  46 struct tMPI_Thread_key
  47 {
  48     DWORD wkey;
  49 };
  50
  51 struct tMPI_Mutex
  52 {
  53     CRITICAL_SECTION cs;
  54 };
  55
  56 struct tMPI_Thread_once
  57 {
  58     int dum;
  59 };
  60
  61 struct tMPI_Thread_cond
  62 {
  63 #if 0
  64     /* this works since Windows Vista: */
  65     CONDITION_VARIABLE cv;
  66 #else
  67     /* this data structure and its algorithms are based on
  68        'Strategies for Implementing POSIX Condition Variables on Win32'
  69        by
  70        Douglas C. Schmidt and Irfan Pyarali
  71        Department of Computer Science
  72        Washington University, St. Louis, Missouri
  73        http://www.cs.wustl.edu/~schmidt/win32-cv-1.html */
  74     int Nwaiters; /* number of waiting threads */
  75     CRITICAL_SECTION wtr_lock; /* lock for Nwaiters */
  76     int Nrelease; /* number of threads to release in broadcast/signal */
  77     int cycle; /* cycle number so threads can't steal signals */
  78     HANDLE ev; /* the event used to trigger WaitForSingleObject.
  79                   Is a manual reset event.  */
  80 #endif
  81 };
  82
  83 struct tMPI_Thread_barrier
  84 {
  85 #if 0
  86     /* use this once Vista is the oldest supported windows version: */
  87     CRITICAL_SECTION   cs;        /*!< Lock for the barrier
  88                                     contents          */
  89     CONDITION_VARIABLE cv;        /*!< Condition to signal barrier
  90                                     completion */
  91 #else
  92     tMPI_Thread_mutex_t cs;   /*!< Lock for the barrier contents          */
  93     tMPI_Thread_cond_t  cv;      /*!< Condition to signal barrier completion */
  94 #endif
  95 };
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