libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.cons/move_assign.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, c++03
  10
  11 // <mutex>
  12
  13 // template <class Mutex> class unique_lock;
  14
  15 // unique_lock& operator=(unique_lock&& u);
  16
  17 #include <mutex>
  18 #include <cassert>
  19 #include "nasty_containers.h"
  20
  21 #include "test_macros.h"
  22
  23 int main(int, char**)
  24 {
  25     {
  26     typedef std::mutex M;
  27     M m0;
  28     M m1;
  29     std::unique_lock<M> lk0(m0);
  30     std::unique_lock<M> lk1(m1);
  31     lk1 = std::move(lk0);
  32     assert(lk1.mutex() == std::addressof(m0));
  33     assert(lk1.owns_lock() == true);
  34     assert(lk0.mutex() == nullptr);
  35     assert(lk0.owns_lock() == false);
  36     }
  37     {
  38     typedef nasty_mutex M;
  39     M m0;
  40     M m1;
  41     std::unique_lock<M> lk0(m0);
  42     std::unique_lock<M> lk1(m1);
  43     lk1 = std::move(lk0);
  44     assert(lk1.mutex() == std::addressof(m0));
  45     assert(lk1.owns_lock() == true);
  46     assert(lk0.mutex() == nullptr);
  47     assert(lk0.owns_lock() == false);
  48     }
  49
  50   return 0;
  51 }