2 //===----------------------------------------------------------------------===//
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
8 //===----------------------------------------------------------------------===//
10 export namespace std {
11 #if _LIBCPP_HAS_THREADS
12 // [thread.sharedmutex.class], class shared_mutex
13 using std::shared_mutex;
14 // [thread.sharedtimedmutex.class], class shared_timed_mutex
15 using std::shared_timed_mutex;
16 // [thread.lock.shared], class template shared_lock
17 using std::shared_lock;
19 #endif // _LIBCPP_HAS_THREADS