libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.cons/mutex_time_point.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 Clock, class Duration>
  12 // unique_lock::unique_lock(mutex_type& m, const chrono::time_point<Clock, Duration>& abs_time);
  13
  14 #include <cassert>
  15 #include <chrono>
  16 #include <mutex>
  17
  18 #include "checking_mutex.h"
  19
  20 int main(int, char**) {
  21   checking_mutex mux;
  22
  23   { // check successful lock
  24     mux.reject = false;
  25     std::unique_lock<checking_mutex> lock(mux, std::chrono::time_point<std::chrono::system_clock>());
  26     assert(mux.current_state == checking_mutex::locked_via_try_lock_until);
  27     assert(lock.owns_lock());
  28   }
  29   assert(mux.current_state == checking_mutex::unlocked);
  30
  31   { // check unsuccessful lock
  32     mux.reject = true;
  33     std::unique_lock<checking_mutex> lock(mux, std::chrono::time_point<std::chrono::system_clock>());
  34     assert(mux.current_state == checking_mutex::unlocked);
  35     assert(mux.last_try == checking_mutex::locked_via_try_lock_until);
  36     assert(!lock.owns_lock());
  37   }
  38   assert(mux.current_state == checking_mutex::unlocked);
  39
  40   return 0;
  41 }