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1// -*- C++ -*-2//===----------------------------------------------------------------------===//3//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-exception7//8//===----------------------------------------------------------------------===//9 10export namespace std {11#if _LIBCPP_HAS_THREADS12 // [thread.sharedmutex.class], class shared_mutex13 using std::shared_mutex;14 // [thread.sharedtimedmutex.class], class shared_timed_mutex15 using std::shared_timed_mutex;16 // [thread.lock.shared], class template shared_lock17 using std::shared_lock;18 using std::swap;19#endif // _LIBCPP_HAS_THREADS20} // namespace std21