Merge tag 'upstream/libpthread/20090404' into upstream-merged

1 files changed, 42 insertions, 0 deletions

diff --git a/libpthread/sysdeps/generic/pt-cond-brdcast.c b/libpthread/sysdeps/generic/pt-cond-brdcast.c
new file mode 100644
index 00000000..3f55e33e
--- /dev/null
+++ b/libpthread/sysdeps/generic/pt-cond-brdcast.c
@@ -0,0 +1,42 @@
+/* Broadcast a condition.  Generic version.
+   Copyright (C) 2000, 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <pthread.h>
+
+#include <pt-internal.h>
+
+/* Unblock all threads that are blocked on condition variable COND.  */
+int
+pthread_cond_broadcast (pthread_cond_t *cond)
+{
+  struct __pthread *wakeup;
+
+  __pthread_spin_lock (&cond->__lock);
+
+  wakeup = cond->__queue;
+  cond->__queue = NULL;
+  __pthread_spin_unlock (&cond->__lock);
+
+  /* We can safely walk the list of waiting threads without holding
+     the lock since it is now decoupled from the condition.  */
+  __pthread_dequeuing_iterate (wakeup, wakeup)
+    __pthread_wakeup (wakeup);
+
+  return 0;
+}