README file of RTLinux POSIX Barriers. Written by P. Balbastre Copyright (C) [April 2003] OCERA Consortium. This program 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 version 2. Barriers, are defined in the advanced real-time POSIX (IEEE Std 1003.1-2001), as part of the advanced real-time threads extensions. A barrier is a simple and efficient synchronisation utility. Threads using a barrier must wait at a specific point until all have finished before any of them can continue.