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 // UNSUPPORTED: libcpp-has-no-threads 11 12 // <mutex> 13 14 // template <class Mutex> class unique_lock; 15 16 // mutex_type* release() noexcept; 17 18 #include <mutex> 19 #include <cassert> 20 21 struct mutex 22 { 23 static int lock_count; 24 static int unlock_count; 25 void lock() {++lock_count;} 26 void unlock() {++unlock_count;} 27 }; 28 29 int mutex::lock_count = 0; 30 int mutex::unlock_count = 0; 31 32 mutex m; 33 34 int main() 35 { 36 std::unique_lock<mutex> lk(m); 37 assert(lk.mutex() == &m); 38 assert(lk.owns_lock() == true); 39 assert(mutex::lock_count == 1); 40 assert(mutex::unlock_count == 0); 41 assert(lk.release() == &m); 42 assert(lk.mutex() == nullptr); 43 assert(lk.owns_lock() == false); 44 assert(mutex::lock_count == 1); 45 assert(mutex::unlock_count == 0); 46 } 47
