# concurrence.h

    00001 // Support for concurrent programing -*- C++ -*-
    00002
    00003 // Copyright (C) 2003, 2004
    00004 // Free Software Foundation, Inc.
    00005 //
    00006 // This file is part of the GNU ISO C++ Library.  This library is free
    00007 // software; you can redistribute it and/or modify it under the
    00008 // terms of the GNU General Public License as published by the
    00009 // Free Software Foundation; either version 2, or (at your option)
    00010 // any later version.
    00011
    00012 // This library is distributed in the hope that it will be useful,
    00013 // but WITHOUT ANY WARRANTY; without even the implied warranty of
    00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00015 // GNU General Public License for more details.
    00016
    00017 // You should have received a copy of the GNU General Public License along
    00018 // with this library; see the file COPYING.  If not, write to the Free
    00019 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
    00020 // USA.
    00021
    00022 // As a special exception, you may use this file as part of a free software
    00023 // library without restriction.  Specifically, if other files instantiate
    00024 // templates or use macros or inline functions from this file, or you compile
    00025 // this file and link it with other files to produce an executable, this
    00026 // file does not by itself cause the resulting executable to be covered by
    00027 // the GNU General Public License.  This exception does not however
    00028 // invalidate any other reasons why the executable file might be covered by
    00029 // the GNU General Public License.
    00030
    00031 #ifndef _CONCURRENCE_H
    00032 #define _CONCURRENCE_H 1
    00033
    00034 // GCC's thread abstraction layer
    00035 #include "bits/gthr.h"
    00036
    00037 #if __GTHREADS
    00038
    00039 # ifdef __GTHREAD_MUTEX_INIT
    00040 #  define __glibcxx_mutex_define_initialized(NAME) \
    00041 __gthread_mutex_t NAME = __GTHREAD_MUTEX_INIT
    00042 #  define __glibcxx_mutex_lock(NAME) \
    00043 __gthread_mutex_lock(&NAME)
    00044 # else
    00045 // Implies __GTHREAD_MUTEX_INIT_FUNCTION
    00046 #  define __glibcxx_mutex_define_initialized(NAME) \
    00047 __gthread_mutex_t NAME; \
    00048 __gthread_once_t NAME ## _once = __GTHREAD_ONCE_INIT; \
    00049 void NAME ## _init() { __GTHREAD_MUTEX_INIT_FUNCTION(&NAME); }
    00050 # define __glibcxx_mutex_lock(NAME) \
    00051 __gthread_once(&NAME ## _once, NAME ## _init); \
    00052 __gthread_mutex_lock(&NAME)
    00053 # endif
    00054
    00055 # define __glibcxx_mutex_unlock(NAME) __gthread_mutex_unlock(&NAME)
    00056
    00057 #else
    00058
    00059 # define __glibcxx_mutex_define_initialized(NAME)
    00060 # define __glibcxx_mutex_lock(NAME)
    00061 # define __glibcxx_mutex_unlock(NAME)
    00062
    00063 #endif
    00064
    00065 #endif