(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.

1 files changed, 98 insertions, 0 deletions

diff --git a/linuxthreads/Examples/ex9.c b/linuxthreads/Examples/ex9.c
new file mode 100644
index 0000000000..3c8b8142e1
--- /dev/null
+++ b/linuxthreads/Examples/ex9.c
@@ -0,0 +1,98 @@
+/* Tests for pthread_barrier_* functions.
+   Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
+   Contributed by Kaz Kylheku <kaz@ashi.footprints.net>, 2000.
+
+   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; 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 <errno.h>
+#include <error.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+
+#define NUM_THREADS 10
+#define NUM_ITERS   500
+
+static void *thread (void *)  __attribute__ ((__noreturn__));
+static pthread_barrier_t barrier;
+
+int
+main (void)
+{
+  pthread_t thread_list[NUM_THREADS];
+  int i;
+
+  if (pthread_barrier_init (&barrier, NULL, NUM_THREADS + 1) != 0)
+    error (EXIT_FAILURE, 0, "cannot initialize barrier");
+
+  for (i = 0; i < NUM_THREADS; i++)
+    {
+      if (pthread_create (&thread_list[i], NULL, thread, NULL) != 0)
+	error (EXIT_FAILURE, 0, "cannot create thread");
+    }
+
+  (void) thread (NULL);
+
+  for (i = 0; i < NUM_THREADS; i++)
+    {
+      pthread_join(thread_list[i], NULL);
+    }
+
+  return 0;
+}
+
+
+static void *
+thread (void *arg)
+{
+  int i;
+  pthread_t self = pthread_self ();
+  static pthread_t last_serial_thread;
+  static int linecount; /* protected by flockfile(stdout) */
+
+  for (i = 0; i < NUM_ITERS; i++)
+    {
+      switch (pthread_barrier_wait (&barrier))
+	{
+	case 0:
+	  flockfile (stdout);
+	  printf ("%04d: non-serial thread %lu\n", ++linecount,
+		  (unsigned long) self);
+	  funlockfile (stdout);
+	  break;
+	case PTHREAD_BARRIER_SERIAL_THREAD:
+	  flockfile (stdout);
+	  printf ("%04d: serial thread %lu\n", ++linecount,
+		  (unsigned long) self);
+	  funlockfile (stdout);
+	  last_serial_thread = self;
+	  break;
+	default:
+	  /* Huh? */
+	  error (EXIT_FAILURE, 0, "unexpected return value from barrier wait");
+	}
+    }
+
+  if (pthread_equal (self, last_serial_thread))
+  {
+    flockfile (stdout);
+    printf ("%04d: last serial thread %lu terminating process\n",
+	    ++linecount, (unsigned long) self);
+    funlockfile (stdout);
+  }
+
+  pthread_exit(NULL);
+}