diff -r 000000000000 -r 6474c204b198 nsprpub/pr/tests/yield.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nsprpub/pr/tests/yield.c	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,56 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <stdio.h>
+#include "prthread.h"
+#include "prinit.h"
+#ifndef XP_OS2
+#include "private/pprmisc.h"
+#include <windows.h>
+#else
+#include "primpl.h"
+#include <os2.h>
+#endif
+
+#define THREADS 10
+
+
+void 
+threadmain(void *_id)
+{
+    int id = (int)_id;
+    int index;
+
+    printf("thread %d alive\n", id);
+    for (index=0; index<10; index++) {
+        printf("thread %d yielding\n", id);
+        PR_Sleep(0);
+        printf("thread %d awake\n", id);
+    }
+    printf("thread %d dead\n", id);
+
+}
+
+int main(int argc, char **argv)
+{
+    int index;
+    PRThread *a[THREADS];
+
+    PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 5);
+    PR_STDIO_INIT();
+
+    for (index=0; index<THREADS; index++) {
+        a[index] = PR_CreateThread(PR_USER_THREAD,
+                              threadmain,
+                              (void *)index,
+                              PR_PRIORITY_NORMAL,
+                              index%2?PR_LOCAL_THREAD:PR_GLOBAL_THREAD,
+                              PR_JOINABLE_THREAD,
+                              0);
+    }
+    for(index=0; index<THREADS; index++)
+        PR_JoinThread(a[index]);
+    printf("main dying\n");
+}