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 19 struct mutex 20 { 21 static int lock_count; 22 static int unlock_count; 23 void lock() {++lock_count;} 24 void unlock() {++unlock_count;} 25 }; 26 27 int mutex::lock_count = 0; 28 int mutex::unlock_count = 0; 29 30 mutex m; 31 32 int 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
