libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.shared/thread.lock.shared.cons/default.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // UNSUPPORTED: no-threads
  10 // UNSUPPORTED: c++03, c++11
  11
  12 // <shared_mutex>
  13
  14 // template <class Mutex> class shared_lock;
  15
  16 // shared_lock();
  17
  18 #include <shared_mutex>
  19 #include <cassert>
  20
  21 #include "test_macros.h"
  22
  23 int main(int, char**)
  24 {
  25     std::shared_lock<std::shared_timed_mutex> ul;
  26     assert(!ul.owns_lock());
  27     assert(ul.mutex() == nullptr);
  28
  29   return 0;
  30 }