1 files changed, 86 insertions, 0 deletions
diff --git a/nptl/pthread_cond_broadcast.c b/nptl/pthread_cond_broadcast.c
new file mode 100644
index 0000000000..2b8b5460f4
--- /dev/null
+++ b/nptl/pthread_cond_broadcast.c
@@ -0,0 +1,86 @@
+/* Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <endian.h>
+#include <errno.h>
+#include <sysdep.h>
+#include <lowlevellock.h>
+#include <pthread.h>
+#include <pthreadP.h>
+
+#include <shlib-compat.h>
+#include <kernel-features.h>
+
+
+int
+__pthread_cond_broadcast (cond)
+     pthread_cond_t *cond;
+{
+  /* Make sure we are alone.  */
+  lll_mutex_lock (cond->__data.__lock);
+
+  /* Are there any waiters to be woken?  */
+  if (cond->__data.__total_seq > cond->__data.__wakeup_seq)
+    {
+      /* Yes.  Mark them all as woken.  */
+      cond->__data.__wakeup_seq = cond->__data.__total_seq;
+      cond->__data.__woken_seq = cond->__data.__total_seq;
+      cond->__data.__futex = (unsigned int) cond->__data.__total_seq * 2;
+      int futex_val = cond->__data.__futex;
+      /* Signal that a broadcast happened.  */
+      ++cond->__data.__broadcast_seq;
+
+      /* We are done.  */
+      lll_mutex_unlock (cond->__data.__lock);
+
+      /* Do not use requeue for pshared condvars.  */
+      if (cond->__data.__mutex == (void *) ~0l)
+	goto wake_all;
+
+      /* Wake everybody.  */
+      pthread_mutex_t *mut = (pthread_mutex_t *) cond->__data.__mutex;
+
+      /* XXX: Kernel so far doesn't support requeue to PI futex.  */
+      if (__builtin_expect (mut->__data.__kind & PTHREAD_MUTEX_PRIO_INHERIT_NP,
+			    0))
+	goto wake_all;
+
+      /* lll_futex_requeue returns 0 for success and non-zero
+	 for errors.  */
+      if (__builtin_expect (lll_futex_requeue (&cond->__data.__futex, 1,
+					       INT_MAX, &mut->__data.__lock,
+					       futex_val), 0))
+	{
+	  /* The requeue functionality is not available.  */
+	wake_all:
+	  lll_futex_wake (&cond->__data.__futex, INT_MAX);
+	}
+
+      /* That's all.  */
+      return 0;
+    }
+
+  /* We are done.  */
+  lll_mutex_unlock (cond->__data.__lock);
+
+  return 0;
+}
+
+versioned_symbol (libpthread, __pthread_cond_broadcast, pthread_cond_broadcast,
+		  GLIBC_2_3_2);