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+/*
+ * once3.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
+ *
+ * --------------------------------------------------------------------------
+ *
+ * Create several pthread_once objects and channel several threads
+ * through each. Make the init_routine cancelable and cancel them
+ * waiters waiting.
+ *
+ * Depends on API functions:
+ * pthread_once()
+ * pthread_create()
+ * pthread_testcancel()
+ * pthread_cancel()
+ * pthread_once()
+ */
+
+#include "test.h"
+
+#define NUM_THREADS 100 /* Targeting each once control */
+#define NUM_ONCE 10
+
+pthread_once_t o = PTHREAD_ONCE_INIT;
+pthread_once_t once[NUM_ONCE];
+
+static int numOnce = 0;
+static int numThreads = 0;
+
+void
+myfunc(void)
+{
+ numOnce++;
+ /* Simulate slow once routine so that following threads pile up behind it */
+ Sleep(10);
+ /* test for cancelation late so we're sure to have waiters. */
+ pthread_testcancel();
+}
+
+void *
+mythread(void * arg)
+{
+ /*
+ * Cancel every thread. These threads are deferred cancelable only, so
+ * only the thread performing the init_routine will see it (there are
+ * no other cancelation points here). The result will be that every thread
+ * eventually cancels only when it becomes the new initter.
+ */
+ pthread_cancel(pthread_self());
+ assert(pthread_once(&once[(int) arg], myfunc) == 0);
+ numThreads++;
+ return 0;
+}
+
+int
+main()
+{
+ pthread_t t[NUM_THREADS][NUM_ONCE];
+ int i, j;
+
+ for (j = 0; j < NUM_ONCE; j++)
+ {
+ once[j] = o;
+
+ for (i = 0; i < NUM_THREADS; i++)
+ {
+ assert(pthread_create(&t[i][j], NULL, mythread, (void *) j) == 0);
+ }
+ }
+
+ for (j = 0; j < NUM_ONCE; j++)
+ for (i = 0; i < NUM_THREADS; i++)
+ if (pthread_join(t[i][j], NULL) != 0)
+ printf("Join failed for [thread,once] = [%d,%d]\n", i, j);
+
+ /*
+ * All threads will cancel, none will return normally from
+ * pthread_once and so numThreads should never be incremented. However,
+ * numOnce should be incremented by every thread (NUM_THREADS*NUM_ONCE).
+ */
+ assert(numOnce == NUM_ONCE * NUM_THREADS);
+ assert(numThreads == 0);
+
+ return 0;
+}