Update.

	* sysdeps/unix/sysv/linux/i386/i486/pthread_barrier_wait.S
	(pthread_barrier_wait): After wakeup, release lock only when the
	last thread stopped using the barrier object.
	* sysdeps/unix/sysv/linux/x86_64/pthread_barrier_wait.S
	(pthread_barrier_wait): Likewise.
	* sysdeps/pthread/pthread_barrier_wait.c (pthread_barrier_wait):
	Likewise.
	* Makefile (tests): Add tst-barrier4.
	* tst-barrier4.c: New file.

1 files changed, 102 insertions, 0 deletions

diff --git a/nptl/tst-barrier4.c b/nptl/tst-barrier4.c
new file mode 100644
index 0000000000..a811feefa5
--- /dev/null
+++ b/nptl/tst-barrier4.c
@@ -0,0 +1,102 @@
+/* Copyright (C) 2004 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2004.
+
+   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.  */
+
+/* This is a test for behavior not guaranteed by POSIX.  */
+#include <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+
+
+static pthread_barrier_t b1;
+static pthread_barrier_t b2;
+
+
+#define N 20
+
+static void *
+tf (void *arg)
+{
+  int round = 0;
+
+  while (round++ < 30)
+    {
+      if (pthread_barrier_wait (&b1) == PTHREAD_BARRIER_SERIAL_THREAD)
+	{
+	  pthread_barrier_destroy (&b1);
+	  if (pthread_barrier_init (&b1, NULL, N) != 0)
+	    {
+	      puts ("tf: 1st barrier_init failed");
+	      exit (1);
+	    }
+	}
+
+      if (pthread_barrier_wait (&b2) == PTHREAD_BARRIER_SERIAL_THREAD)
+	{
+	  pthread_barrier_destroy (&b2);
+	  if (pthread_barrier_init (&b2, NULL, N) != 0)
+	    {
+	      puts ("tf: 2nd barrier_init failed");
+	      exit (1);
+	    }
+	}
+    }
+
+  return NULL;
+}
+
+
+static int
+do_test (void)
+{
+  int cnt;
+
+  if (pthread_barrier_init (&b1, NULL, N) != 0)
+    {
+      puts ("1st barrier_init failed");
+      return 1;
+    }
+
+  if (pthread_barrier_init (&b2, NULL, N) != 0)
+    {
+      puts ("2nd barrier_init failed");
+      return 1;
+    }
+
+  pthread_t th[N - 1];
+  for (cnt = 0; cnt < N - 1; ++cnt)
+    if (pthread_create (&th[cnt], NULL, tf, NULL) != 0)
+      {
+	puts ("pthread_create failed");
+	return 1;
+      }
+
+  tf (NULL);
+
+  for (cnt = 0; cnt < N - 1; ++cnt)
+    if (pthread_join (th[cnt], NULL) != 0)
+      {
+	puts ("pthread_join failed");
+	return 1;
+      }
+
+  return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"