tests whether the lock owns (i.e., has locked) its associated mutex (public member function) operator bool tests whether the lock owns (i.e., has locked) its associated mutex (public member function) Non-member
unique_lock::try_lock_for unique_lock::try_lock_until unique_lock::unlock Modifiers unique_lock::swap unique_lock::release Observers unique_lock::mutex unique_lock::owns_lock unique_lock::operator bool Non-member functions swap(std::unique_lock) ...
<chrono> int main() { int counter = 0; std::mutex counter_mutex; std::vector<std::thread> threads; auto worker_task = [&](int id) { std::unique_lock<std::mutex> lock(counter_mutex); ++counter; std::cout << id << ", initial counter: " << counter << '\n'; lock.unlock...
voidlock(); (since C++11) Parameters (none) Return value (none) Exceptions If there is no associated mutex,std::system_errorwith an error code ofstd::errc::operation_not_permitted. If the mutex is already locked by thisunique_lock(in other words,owns_lock()istrue),std::system_errorwith...
scope_exit−scope_fail−scope_success−unique_resource Parallelism library extensions v2 (parallelism TS v2) simd Concurrency library extensions (concurrency TS) Transactional Memory(TM TS) Reflection(reflection TS) External Links−Non-ANSI/ISO Libraries−Index−std Symbol Index ...
{std::unique_lock<std::mutex>lock(m);while(!done){while(!notified){// loop to avoid spurious wakeupscond_var.wait(lock);}while(!produced_nums.empty()){std::cout<<"consuming "<<produced_nums.front()<<'\n';produced_nums.pop();}notified=false;}});producer.join();consumer.join()...
std::unique_lock<std::mutex> lock; extern bool predicate(); // 调用方式 1 cond.wait(lock); // 调用方式 2 cond.wait(lock, predicate); wait不断地尝试重新获取并加锁该互斥量,如果获取不到,它就卡在这里并反复尝试重新获取,如果获取到了,执行流程就继续往下走 wait在获取到互斥量并加锁了互斥量...
std::unique_lock<std::mutex> lock; extern bool predicate(); // 调用方式 1 cond.wait(lock); // 调用方式 2 cond.wait(lock, predicate); wait不断地尝试重新获取并加锁该互斥量,如果获取不到,它就卡在这里并反复尝试重新获取,如果获取到了,执行流程就继续往下走 wait在获取到互斥量并加锁了互斥量...
unique_lock<Mutex> std::adopt_lock std::try_to_lock std::defer_lock std::unique_lock<Mutex>::release std::call_once std::condition_variable 创建条件变量 等待条件变量被通知 std::condition_variable::notify_one std::condition_variable::notify_all 获取线程的运行结果 创建异步任务 获取异步任务的...
额外参数:std::adopt_lock:只需解锁,无需上锁 // 手动上锁 m.lock(); std::lock_guard<mutex> lock(m, std::adopt_lock); unique_lock<Mutex> 构造上锁,析构解锁 std::mutex m; std::unique_lock<mutex> lock(m); std::adopt_lock 只需解锁,无需上锁 // 手动上锁 m.lock(); std::unique_loc...