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 14bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// template <class Mutex> 15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// void swap(unique_lock<Mutex>& x, unique_lock<Mutex>& y); 16bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 17bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <mutex> 18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <cassert> 19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 20bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantstruct mutex 21bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 22bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant void lock() {} 23bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant void unlock() {} 24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant}; 25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantmutex m; 27bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 28bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint main() 29bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 30bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::unique_lock<mutex> lk1(m); 31bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::unique_lock<mutex> lk2; 32bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant swap(lk1, lk2); 33bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(lk1.mutex() == nullptr); 34bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(lk1.owns_lock() == false); 35bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(lk2.mutex() == &m); 36bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(lk2.owns_lock() == true); 37bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 38