Imported Upstream version 0.13.2+dsfg1

deps/w32-pthreads/tests/reuse2.c

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+/*
+ * File: reuse2.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.,
+ *      51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ *
+ * --------------------------------------------------------------------------
+ *
+ * Test Synopsis:
+ * - Test that thread reuse works for detached threads.
+ * - Analyse thread struct reuse.
+ *
+ * Test Method (Validation or Falsification):
+ * -
+ *
+ * Requirements Tested:
+ * -
+ *
+ * Features Tested:
+ * -
+ *
+ * Cases Tested:
+ * -
+ *
+ * Description:
+ * -
+ *
+ * Environment:
+ * - This test is implementation specific
+ * because it uses knowledge of internals that should be
+ * opaque to an application.
+ *
+ * Input:
+ * - None.
+ *
+ * Output:
+ * - File name, Line number, and failed expression on failure.
+ * - No output on success.
+ *
+ * Assumptions:
+ * -
+ *
+ * Pass Criteria:
+ * - Process returns zero exit status.
+ *
+ * Fail Criteria:
+ * - Process returns non-zero exit status.
+ */
+
+#include "test.h"
+
+/*
+ */
+
+enum {
+	NUMTHREADS = 10000
+};
+
+
+static long done = 0;
+
+void * func(void * arg)
+{
+  sched_yield();
+
+  InterlockedIncrement(&done);
+
+  return (void *) 0; 
+}
+ 
+int
+main()
+{
+  pthread_t t[NUMTHREADS];
+  pthread_attr_t attr;
+  int i;
+  unsigned int notUnique = 0,
+	       totalHandles = 0,
+	       reuseMax = 0,
+	       reuseMin = NUMTHREADS;
+
+  assert(pthread_attr_init(&attr) == 0);
+  assert(pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED) == 0);
+
+  for (i = 0; i < NUMTHREADS; i++)
+    {
+      while(pthread_create(&t[i], &attr, func, NULL) != 0)
+        Sleep(1);
+    }
+
+  while (NUMTHREADS > InterlockedExchangeAdd((LPLONG)&done, 0L))
+    Sleep(100);
+
+  Sleep(100);
+
+  /*
+   * Analyse reuse by computing min and max number of times pthread_create()
+   * returned the same pthread_t value.
+   */
+  for (i = 0; i < NUMTHREADS; i++)
+    {
+      if (t[i].p != NULL)
+        {
+          unsigned int j, thisMax;
+
+          thisMax = t[i].x;
+
+          for (j = i+1; j < NUMTHREADS; j++)
+            if (t[i].p == t[j].p)
+              {
+		if (t[i].x == t[j].x)
+		  notUnique++;
+                if (thisMax < t[j].x)
+                  thisMax = t[j].x;
+                t[j].p = NULL;
+              }
+
+          if (reuseMin > thisMax)
+            reuseMin = thisMax;
+
+          if (reuseMax < thisMax)
+            reuseMax = thisMax;
+        }
+    }
+
+  for (i = 0; i < NUMTHREADS; i++)
+    if (t[i].p != NULL)
+      totalHandles++;
+
+  /*
+   * pthread_t reuse counts start at 0, so we need to add 1
+   * to the max and min values derived above.
+   */
+  printf("For %d total threads:\n", NUMTHREADS);
+  printf("Non-unique IDs = %d\n", notUnique);
+  printf("Reuse maximum  = %d\n", reuseMax + 1);
+  printf("Reuse minimum  = %d\n", reuseMin + 1);
+  printf("Total handles  = %d\n", totalHandles);
+
+  return 0;
+}