1 // Support for concurrent programing -*- C++ -*-
3 // Copyright (C) 2003, 2004
4 // Free Software Foundation, Inc.
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)
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.
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,
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.
31 #ifndef _CONCURRENCE_H
32 #define _CONCURRENCE_H 1
34 // GCC's thread abstraction layer
35 #include "bits/gthr.h"
39 # ifdef __GTHREAD_MUTEX_INIT
40 # define __glibcxx_mutex_define_initialized(NAME) \
41 __gthread_mutex_t NAME = __GTHREAD_MUTEX_INIT
42 # define __glibcxx_mutex_lock(NAME) \
43 __gthread_mutex_lock(&NAME)
45 // Implies __GTHREAD_MUTEX_INIT_FUNCTION
46 # define __glibcxx_mutex_define_initialized(NAME) \
47 __gthread_mutex_t NAME; \
48 __gthread_once_t NAME ## _once = __GTHREAD_ONCE_INIT; \
49 void NAME ## _init() { __GTHREAD_MUTEX_INIT_FUNCTION(&NAME); }
50 # define __glibcxx_mutex_lock(NAME) \
51 __gthread_once(&NAME ## _once, NAME ## _init); \
52 __gthread_mutex_lock(&NAME)
55 # define __glibcxx_mutex_unlock(NAME) __gthread_mutex_unlock(&NAME)
59 # define __glibcxx_mutex_define_initialized(NAME)
60 # define __glibcxx_mutex_lock(NAME)
61 # define __glibcxx_mutex_unlock(NAME)