1 files changed, 97 insertions, 0 deletions
diff --git a/sysdeps/pthread/tst-cnd-broadcast.c b/sysdeps/pthread/tst-cnd-broadcast.c
new file mode 100644
index 0000000000..ccc8504f6f
--- /dev/null
+++ b/sysdeps/pthread/tst-cnd-broadcast.c
@@ -0,0 +1,97 @@
+/* C11 threads condition broadcast variable tests.
+   Copyright (C) 2018-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C 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 2.1 of the License, or (at your option) any later version.
+
+   The GNU C 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 the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <threads.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include <support/check.h>
+
+/* Condition variable where child threads will wait.  */
+static cnd_t cond;
+
+/* Mutex to control wait on cond.  */
+static mtx_t mutex;
+
+/* Number of threads which have entered the cnd_wait region.  */
+static unsigned int waiting_threads;
+
+/* Code executed by each thread.  */
+static int
+child_wait (void* data)
+{
+  /* Wait until parent thread sends broadcast here.  */
+  mtx_lock (&mutex);
+  ++waiting_threads;
+  cnd_wait (&cond, &mutex);
+  mtx_unlock (&mutex);
+
+  thrd_exit (thrd_success);
+}
+
+#define N 5
+
+static int
+do_test (void)
+{
+  thrd_t ids[N];
+  unsigned char i;
+
+  if (cnd_init (&cond) != thrd_success)
+    FAIL_EXIT1 ("cnd_init failed");
+  if (mtx_init (&mutex, mtx_plain) != thrd_success)
+    FAIL_EXIT1 ("mtx_init failed");
+
+  /* Create N new threads.  */
+  for (i = 0; i < N; ++i)
+    {
+      if (thrd_create (&ids[i], child_wait, NULL) != thrd_success)
+	FAIL_EXIT1 ("thrd_create failed");
+    }
+
+  /* Wait for other threads to reach their wait func.  */
+  while (true)
+    {
+      mtx_lock (&mutex);
+      TEST_VERIFY (waiting_threads <= N);
+      bool done_waiting = waiting_threads == N;
+      mtx_unlock (&mutex);
+      if (done_waiting)
+	break;
+      thrd_sleep (&((struct timespec){.tv_nsec = 100 * 1000 * 1000}), NULL);
+    }
+
+  mtx_lock (&mutex);
+  if (cnd_broadcast (&cond) != thrd_success)
+    FAIL_EXIT1 ("cnd_broadcast failed");
+  mtx_unlock (&mutex);
+
+  for (i = 0; i < N; ++i)
+    {
+      if (thrd_join (ids[i], NULL) != thrd_success)
+	FAIL_EXIT1 ("thrd_join failed");
+    }
+
+  mtx_destroy (&mutex);
+  cnd_destroy (&cond);
+
+  return 0;
+}
+
+#include <support/test-driver.c>