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