1bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===// 2bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 3f5256e16dfc425c1d466f6308d4026d529ce9e0bHoward Hinnant// The LLVM Compiler Infrastructure 4bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details. 7bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 8bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===// 9bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 10bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// <mutex> 11bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 12bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// template <class Mutex> class unique_lock; 13bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 14ba898e42081aec544a04d282834aa99b13d57803Howard Hinnant// mutex_type* release() noexcept; 15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 16bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <mutex> 17bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <cassert> 18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantstruct mutex 20bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 21bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant static int lock_count; 22bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant static int unlock_count; 23bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant void lock() {++lock_count;} 24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant void unlock() {++unlock_count;} 25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant}; 26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 27bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint mutex::lock_count = 0; 28bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint mutex::unlock_count = 0; 29bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 30bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantmutex m; 31bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 32bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint main() 33bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 34bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::unique_lock<mutex> lk(m); 35bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(lk.mutex() == &m); 36bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(lk.owns_lock() == true); 37bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(mutex::lock_count == 1); 38bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(mutex::unlock_count == 0); 39bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(lk.release() == &m); 40bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(lk.mutex() == nullptr); 41bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(lk.owns_lock() == false); 42bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(mutex::lock_count == 1); 43bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(mutex::unlock_count == 0); 44bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 45