1 files changed, 88 insertions, 0 deletions
diff --git a/sysdeps/pthread/tst-sem1.c b/sysdeps/pthread/tst-sem1.c
new file mode 100644
index 0000000000..ba46e77fbd
--- /dev/null
+++ b/sysdeps/pthread/tst-sem1.c
@@ -0,0 +1,88 @@
+/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   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 <errno.h>
+#include <semaphore.h>
+#include <stdio.h>
+#include <unistd.h>
+
+
+static int
+do_test (void)
+{
+  sem_t s;
+
+  if (sem_init (&s, 0, 1) == -1)
+    {
+      puts ("init failed");
+      return 1;
+    }
+
+  if (TEMP_FAILURE_RETRY (sem_wait (&s)) == -1)
+    {
+      puts ("1st wait failed");
+      return 1;
+    }
+
+  if (sem_post (&s) == -1)
+    {
+      puts ("1st post failed");
+      return 1;
+    }
+
+  if (TEMP_FAILURE_RETRY (sem_trywait (&s)) == -1)
+    {
+      puts ("1st trywait failed");
+      return 1;
+    }
+
+  errno = 0;
+  if (TEMP_FAILURE_RETRY (sem_trywait (&s)) != -1)
+    {
+      puts ("2nd trywait succeeded");
+      return 1;
+    }
+  else if (errno != EAGAIN)
+    {
+      puts ("2nd trywait did not set errno to EAGAIN");
+      return 1;
+    }
+
+  if (sem_post (&s) == -1)
+    {
+      puts ("2nd post failed");
+      return 1;
+    }
+
+  if (TEMP_FAILURE_RETRY (sem_wait (&s)) == -1)
+    {
+      puts ("2nd wait failed");
+      return 1;
+    }
+
+  if (sem_destroy (&s) == -1)
+    {
+      puts ("destroy failed");
+      return 1;
+    }
+
+  return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"