vendor/libc++/libc++-release_370-r246257

1 files changed, 28 insertions, 0 deletions

diff --git a/test/std/thread/thread.mutex/thread.lock/thread.lock.shared/thread.lock.shared.cons/default.pass.cpp b/test/std/thread/thread.mutex/thread.lock/thread.lock.shared/thread.lock.shared.cons/default.pass.cpp
new file mode 100644
index 000000000000..2c1c665fdeda
--- /dev/null
+++ b/test/std/thread/thread.mutex/thread.lock/thread.lock.shared/thread.lock.shared.cons/default.pass.cpp
@@ -0,0 +1,28 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+
+// <shared_mutex>
+
+// template <class Mutex> class shared_lock;
+
+// shared_lock();
+
+#include <shared_mutex>
+#include <cassert>
+
+int main()
+{
+#if _LIBCPP_STD_VER > 11
+    std::shared_lock<std::shared_timed_mutex> ul;
+    assert(!ul.owns_lock());
+    assert(ul.mutex() == nullptr);
+#endif  // _LIBCPP_STD_VER > 11
+}