diff options
Diffstat (limited to 'atomic.h')
-rw-r--r-- | atomic.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/atomic.h b/atomic.h new file mode 100644 index 00000000..28ed24e5 --- /dev/null +++ b/atomic.h @@ -0,0 +1,37 @@ +/* This header supplies atomic operations. So far, we rely on GCC's + * atomic builtins. I have no idea if we can check them via autotools, + * but I am making the necessary provisioning to live without them if + * they are not available. Please note that you should only use the macros + * here if you think you can actually live WITHOUT an explicit atomic operation, + * because in the non-presence of them, we simply do it without atomicitiy. + * Which, for word-aligned data types, usually (but only usually!) should work. + * + * THESE MACROS MUST ONLY BE USED WITH WORD-SIZED DATA TYPES! + * + * Copyright 2008 Rainer Gerhards and Adiscon GmbH. + * + * This file is part of rsyslog. + * + * Rsyslog is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * Rsyslog is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with Rsyslog. If not, see <http://www.gnu.org/licenses/>. + * + * A copy of the GPL can be found in the file "COPYING" in this distribution. + */ +#include "config.h" /* autotools! */ + +#ifndef INCLUDED_ATOMIC_H +#define INCLUDED_ATOMIC_H + +#define ATOMIC_INC(data) __sync_fetch_and_add(&data, 1); + +#endif /* #ifndef INCLUDED_ATOMIC_H */ |