1 files changed, 20 insertions, 0 deletions

diff --git a/contrib/llvm-project/libcxx/modules/std/shared_mutex.inc b/contrib/llvm-project/libcxx/modules/std/shared_mutex.inc
new file mode 100644
index 000000000000..5f09446e38bc
--- /dev/null
+++ b/contrib/llvm-project/libcxx/modules/std/shared_mutex.inc
@@ -0,0 +1,20 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+export namespace std {
+#ifndef _LIBCPP_HAS_NO_THREADS
+  // [thread.sharedmutex.class], class shared_­mutex
+  using std::shared_mutex;
+  // [thread.sharedtimedmutex.class], class shared_­timed_­mutex
+  using std::shared_timed_mutex;
+  // [thread.lock.shared], class template shared_­lock
+  using std::shared_lock;
+  using std::swap;
+#endif // _LIBCPP_HAS_NO_THREADS
+} // namespace std