libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.cons/mutex_adopt_lock.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 // <mutex>
  10
  11 // template <class Mutex> class unique_lock;
  12
  13 // unique_lock(mutex_type& m, adopt_lock_t);
  14
  15 #include <cassert>
  16 #include <memory>
  17 #include <mutex>
  18
  19 #include "checking_mutex.h"
  20
  21 int main(int, char**) {
  22   checking_mutex m;
  23   m.lock();
  24   m.last_try = checking_mutex::none;
  25   std::unique_lock<checking_mutex> lk(m, std::adopt_lock_t());
  26   assert(m.last_try == checking_mutex::none);
  27   assert(lk.mutex() == std::addressof(m));
  28   assert(lk.owns_lock());
  29
  30   return 0;
  31 }