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Diffstat (limited to 'nptl/tst-cnd-basic.c')
-rw-r--r--nptl/tst-cnd-basic.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/nptl/tst-cnd-basic.c b/nptl/tst-cnd-basic.c
index 84b7f5f647..eb2fb6a77e 100644
--- a/nptl/tst-cnd-basic.c
+++ b/nptl/tst-cnd-basic.c
@@ -31,8 +31,14 @@ static mtx_t mutex;
 static int
 signal_parent (void)
 {
+  /* Acquire the lock so that cnd_signal does not run until
+     cnd_timedwait has been called.  */
+  if (mtx_lock (&mutex) != thrd_success)
+    FAIL_EXIT1 ("mtx_lock failed");
   if (cnd_signal (&cond) != thrd_success)
     FAIL_EXIT1 ("cnd_signal");
+  if (mtx_unlock (&mutex) != thrd_success)
+    FAIL_EXIT1 ("mtx_unlock");
 
   thrd_exit (thrd_success);
 }
@@ -47,6 +53,9 @@ do_test (void)
   if (mtx_init (&mutex, mtx_plain) != thrd_success)
     FAIL_EXIT1 ("mtx_init failed");
 
+  if (mtx_lock (&mutex) != thrd_success)
+    FAIL_EXIT1 ("mtx_lock failed");
+
   if (thrd_create (&id, (thrd_start_t) signal_parent, NULL)
       != thrd_success)
     FAIL_EXIT1 ("thrd_create failed");
@@ -59,6 +68,9 @@ do_test (void)
   if (thrd_join (id, NULL) != thrd_success)
     FAIL_EXIT1 ("thrd_join failed");
 
+  if (mtx_unlock (&mutex) != thrd_success)
+    FAIL_EXIT1 ("mtx_unlock");
+
   mtx_destroy (&mutex);
   cnd_destroy (&cond);