DRD updates (Bart Van Assche):

- Updated copyright statement: replaced 2006-2007 by 2006-2008.
- Added copyright statement in the files where it was missing
(drd_track.h and drd_clientreq.c)
- Eliminated dependencies on core header files -- there are no more
#include "pub_core....h" directives in the exp-drd source code.
- Added semaphore support.
- Added barrier support.
- Added pthread_mutex_timedlock() support.
- Stack depth of stack traces printed by exp-drd can now be set via
--num-callers=...
- Added command-line option --trace-barrier=[yes|no].
- Added regression test for pthread_barrier() (matinv, a program that
performs matrix inversion).
- Added regression test sem_as_mutex, which tests whether race
detection works correctly when a semaphore is used to ensure mutual
exclusion of critical sections.
- Some of helgrind's regression tests are now used to test both
helgrind and exp-drd: tc17_sembar and tc18_semabuse.
- Cleaned up bitmap implementation code now that the const keyword has
been added to the declarations of the OSet functions.
- Cleaned up exp-drd/Makefile.am
- Updated exp-drd/TODO.txt




git-svn-id: svn://svn.valgrind.org/valgrind/trunk@7346 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/exp-drd/drd_barrier.h b/exp-drd/drd_barrier.h
new file mode 100644
index 0000000..edd4235
--- /dev/null
+++ b/exp-drd/drd_barrier.h
@@ -0,0 +1,53 @@
+/*
+  This file is part of drd, a data race detector.
+
+  Copyright (C) 2006-2008 Bart Van Assche
+  bart.vanassche@gmail.com
+
+  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; either version 2 of the
+  License, or (at your option) any later version.
+
+  This program 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 this program; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+  02111-1307, USA.
+
+  The GNU General Public License is contained in the file COPYING.
+*/
+
+
+// Barrier state information.
+
+
+#ifndef __BARRIER_H
+#define __BARRIER_H
+
+
+#include "drd_thread.h"           // DrdThreadId
+#include "drd_vc.h"
+#include "pub_tool_basics.h"      // Addr, SizeT
+
+
+struct barrier_info;
+
+
+void barrier_set_trace(const Bool trace_barrier);
+struct barrier_info* barrier_init(const Addr barrier, const SizeT size,
+                                  const Word count);
+void barrier_destroy(struct barrier_info* const p);
+struct barrier_info* barrier_get(const Addr barrier);
+void barrier_pre_wait(const DrdThreadId tid, const Addr barrier);
+void barrier_post_wait(const DrdThreadId tid, const Addr barrier,
+                       const Bool waited);
+void barrier_thread_delete(const DrdThreadId threadid);
+void barrier_stop_using_mem(const Addr a1, const Addr a2);
+
+
+#endif /* __BARRIER_H */