libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.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 // <mutex>
  10
  11 // template <class Mutex> class unique_lock;
  12
  13 // unique_lock();
  14
  15 #include <cassert>
  16 #include <mutex>
  17 #include <type_traits>
  18
  19 #include "checking_mutex.h"
  20 #include "test_macros.h"
  21
  22 #if TEST_STD_VER >= 11
  23 static_assert(std::is_nothrow_default_constructible<std::unique_lock<checking_mutex>>::value, "");
  24 #endif
  25
  26 int main(int, char**) {
  27   std::unique_lock<checking_mutex> ul;
  28   assert(!ul.owns_lock());
  29   assert(ul.mutex() == nullptr);
  30
  31   return 0;
  32 }