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 // <mutex>
  10
  11 // template <class Mutex> class unique_lock;
  12
  13 // unique_lock& operator=(unique_lock&& u);
  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 m0;
  23   checking_mutex m1;
  24   std::unique_lock<checking_mutex> lk0(m0);
  25   std::unique_lock<checking_mutex> lk1(m1);
  26
  27   auto& result = (lk1 = std::move(lk0));
  28
  29   assert(&result == &lk1);
  30   assert(lk1.mutex() == std::addressof(m0));
  31   assert(lk1.owns_lock());
  32   assert(lk0.mutex() == nullptr);
  33   assert(!lk0.owns_lock());
  34
  35   return 0;
  36 }