libstdc++-v3/include/bits/concurrence.h

   1 // Support for concurrent programing -*- C++ -*-
   2
   3 // Copyright (C) 2003
   4 // Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 2, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING.  If not, write to the Free
  19 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  20 // USA.
  21
  22 // As a special exception, you may use this file as part of a free software
  23 // library without restriction.  Specifically, if other files instantiate
  24 // templates or use macros or inline functions from this file, or you compile
  25 // this file and link it with other files to produce an executable, this
  26 // file does not by itself cause the resulting executable to be covered by
  27 // the GNU General Public License.  This exception does not however
  28 // invalidate any other reasons why the executable file might be covered by
  29 // the GNU General Public License.
  30
  31 #ifndef _CONCURRENCE
  32 #define _CONCURRENCE 1
  33
  34 // GCC's thread abstraction layer
  35 #include "bits/gthr.h"
  36
  37 #if __GTHREADS
  38 # ifdef __GTHREAD_MUTEX_INIT
  39 #  define __glibcxx_mutex_define_initialized(NAME) \
  40 __gthread_mutex_t NAME = __GTHREAD_MUTEX_INIT
  41 # else
  42 #  define __glibcxx_mutex_define_initialized(NAME) \
  43 __gthread_mutex_t NAME; \
  44 __GTHREAD_MUTEX_INIT_FUNCTION(&NAME)
  45 # endif
  46 # define __glibcxx_mutex_lock(LOCK) __gthread_mutex_lock(&LOCK)
  47 # define __glibcxx_mutex_unlock(LOCK) __gthread_mutex_unlock(&LOCK)
  48 #else
  49 # define __glibcxx_mutex_define_initialized(NAME)
  50 # define __glibcxx_mutex_lock(LOCK)
  51 # define __glibcxx_mutex_unlock(LOCK)
  52 #endif
  53
  54 #endif