libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.cons/mutex_defer_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 // UNSUPPORTED: no-threads
  10 // UNSUPPORTED: c++03
  11
  12 // <mutex>
  13
  14 // template <class Mutex> class unique_lock;
  15
  16 // unique_lock(mutex_type& m, defer_lock_t);
  17
  18 #include <mutex>
  19 #include <cassert>
  20 #include "nasty_containers.h"
  21
  22 #include "test_macros.h"
  23
  24 int main(int, char**)
  25 {
  26     {
  27     typedef std::mutex M;
  28     M m;
  29     std::unique_lock<M> lk(m, std::defer_lock);
  30     assert(lk.mutex() == std::addressof(m));
  31     assert(lk.owns_lock() == false);
  32     }
  33     {
  34     typedef nasty_mutex M;
  35     M m;
  36     std::unique_lock<M> lk(m, std::defer_lock);
  37     assert(lk.mutex() == std::addressof(m));
  38     assert(lk.owns_lock() == false);
  39     }
  40
  41   return 0;
  42 }