1 files changed, 78 insertions, 0 deletions
diff --git a/tests/test-windows-recmutex-type.c b/tests/test-windows-recmutex-type.c
new file mode 100644
index 00000000..72cc5d17
--- /dev/null
+++ b/tests/test-windows-recmutex-type.c
@@ -0,0 +1,78 @@
+/* Test of locking in multithreaded situations.
+   Copyright (C) 2024 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2024.  */
+
+#include <config.h>
+
+#if defined _WIN32 && !defined __CYGWIN__
+
+/* Specification.  */
+# include "windows-recmutex.h"
+
+# include <errno.h>
+# include <stdio.h>
+# include <string.h>
+
+# include "macros.h"
+
+/* Returns the effective type of a lock.  */
+static const char *
+get_effective_type (glwthread_recmutex_t *lock)
+{
+  /* Lock once.  */
+  ASSERT (glwthread_recmutex_lock (lock) == 0);
+
+  /* Try to lock a second time.  */
+  int err = glwthread_recmutex_trylock (lock);
+  if (err == 0)
+    return "RECURSIVE";
+  if (err == EBUSY)
+    return "NORMAL";
+
+  return "impossible!";
+}
+
+int
+main ()
+{
+  /* Find the effective type of a lock.  */
+  const char *type;
+  {
+    glwthread_recmutex_t lock;
+    glwthread_recmutex_init (&lock);
+    type = get_effective_type (&lock);
+  }
+
+  printf ("type = %s\n", type);
+
+  ASSERT (strcmp (type, "RECURSIVE") == 0);
+
+  return test_exit_status;
+}
+
+#else
+
+# include <stdio.h>
+
+int
+main ()
+{
+  fputs ("Skipping test: not a native Windows system\n", stderr);
+  return 77;
+}
+
+#endif