1 files changed, 128 insertions, 0 deletions
diff --git a/pthreads/tests/barrier5.c b/pthreads/tests/barrier5.c
new file mode 100644
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+/*
+ * barrier5.c
+ *
+ *
+ * --------------------------------------------------------------------------
+ *
+ *      Pthreads-win32 - POSIX Threads Library for Win32
+ *      Copyright(C) 1998 John E. Bossom
+ *      Copyright(C) 1999,2005 Pthreads-win32 contributors
+ * 
+ *      Contact Email: rpj@callisto.canberra.edu.au
+ * 
+ *      The current list of contributors is contained
+ *      in the file CONTRIBUTORS included with the source
+ *      code distribution. The list can also be seen at the
+ *      following World Wide Web location:
+ *      http://sources.redhat.com/pthreads-win32/contributors.html
+ * 
+ *      This 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 of the License, or (at your option) any later version.
+ * 
+ *      This 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 this library in the file COPYING.LIB;
+ *      if not, write to the Free Software Foundation, Inc.,
+ *      59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ *
+ * --------------------------------------------------------------------------
+ *
+ * Declare a single barrier object, set up a sequence of
+ * barrier points to prove lockstepness, and then destroy it.
+ *
+ */
+
+#include "test.h"
+
+enum {
+  NUMTHREADS = 16,
+  BARRIERS = 10000
+};
+ 
+pthread_barrier_t barrier = NULL;
+pthread_mutex_t mx = PTHREAD_MUTEX_INITIALIZER;
+
+int barrierReleases[BARRIERS + 1];
+
+void *
+func(void * barrierHeight)
+{
+  int i;
+  int result;
+  int serialThreads = 0;
+
+  for (i = 1; i < BARRIERS; i++)
+    {
+      result = pthread_barrier_wait(&barrier);
+
+      assert(pthread_mutex_lock(&mx) == 0);
+      barrierReleases[i]++;
+      assert(pthread_mutex_unlock(&mx) == 0);
+      /*
+       * Confirm the correct number of releases from the previous
+       * barrier. We can't do the current barrier yet because there may
+       * still be threads waking up.
+       */
+      if (result == PTHREAD_BARRIER_SERIAL_THREAD)
+        {
+          serialThreads++;
+          assert(barrierReleases[i - 1] == (int) barrierHeight);
+          barrierReleases[i + 1] = 0;
+        }
+      else if (result != 0)
+        {
+          printf("Barrier failed: result = %s\n", error_string[result]);
+          fflush(stdout);
+          return NULL;
+        }
+    }
+
+  return (void *) serialThreads;
+}
+
+int
+main()
+{
+  int i, j;
+  int result;
+  int serialThreadsTotal;
+  pthread_t t[NUMTHREADS + 1];
+
+  for (j = 1; j <= NUMTHREADS; j++)
+    {
+      printf("Barrier height = %d\n", j);
+
+      barrierReleases[0] = j;
+      barrierReleases[1] = 0;
+
+      assert(pthread_barrier_init(&barrier, NULL, j) == 0);
+
+      for (i = 1; i <= j; i++)
+        {
+          assert(pthread_create(&t[i], NULL, func, (void *) j) == 0);
+        }
+
+      serialThreadsTotal = 0;
+      for (i = 1; i <= j; i++)
+        {
+          assert(pthread_join(t[i], (void **) &result) == 0);
+          serialThreadsTotal += result;
+        }
+
+      assert(serialThreadsTotal == BARRIERS - 1);
+      assert(barrierReleases[BARRIERS - 1] == j);
+      assert(barrierReleases[BARRIERS] == 0);
+
+      assert(pthread_barrier_destroy(&barrier) == 0);
+    }
+
+  assert(pthread_mutex_destroy(&mx) == 0);
+
+  return 0;
+}