std::unique_lock<std::mutex> locker(m_mutex1,std::defer_lock);//第二个参数说明这个锁的状态,默认是锁定的(即只有一个参数的时候是默认锁定的)locker.lock()lock.unlock() 二、unick_lock应用 voidshared_print(stringmsg,intid) { std::unique_lock<std::mutex>guard(_mu, std::defer_lock);//d...
std::unique_lock<std::mutex> locker2(_mu_open); if(!_f.is_open()) { // std::unique_lock<std::mutex> locker2(_mu_open); // still not thread safe _f.open("log.txt"); // thread safe } } std::lock_guard<std::mutex> locker(_mu); cout << "From " << id << ": " ...
unique_lock与lock_guard都能实现自动加锁和解锁,但是前者更加灵活,能实现更多的功能。unique_lock可以进行临时解锁和再上锁,如在构造对象之后使用lck.unlock()就可以进行解锁,lck.lock()进行上锁,而不必等到析构时自动解锁。 unique_lock扩展条件变量 C++11提供std::condition_variable可以和std::mutex配合使...
voidshared_print(stringid,intvalue){std::unique_lock<mutex>locker2(_mu_open);if(!_f.is_open()){_f.open("log.txt");}std::unique_lock<mutex>locker(_mu,std::deter::defer_lock);_f<<id<<": "<<value<<endl;// ...locker.lock();} 但是这样又有了新问题:每次shared_print时,都会检...
(mtx1,defer_lock) unique_lock lock2(mtx2,defer_lock) lock(lock1,lock2) unique_lock VS lock_guard lock_guard 不允许手动unlock/lock 性能消耗小 unique_lock更加灵活, 允许手动多次 unlock/lock 性能消耗大 void foo() { unique_lock<mutex> locker(mtx,defer_lock); defer_lock假定还没有上锁 //...
unique_lock VS lock_guard lock_guard 不允许⼿动unlock/lock性能消耗⼩ unique_lock更加灵活，允许⼿动多次 unlock/lock性能消耗⼤ void foo() { unique_lock<mutex> locker(mtx,defer_lock); defer_lock假定还没有上锁 // do something not using mtx mtx.lock();// do something using mtx to ...
在下文中一共展示了unique_lock::unlock方法的15个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。 示例1: maybe_notify ▲点赞 9▼ voidalert_manager::maybe_notify(alert* a,std::unique_lock<std::mutex>& lock) ...
上C++17..。同时，不需要类型擦除。模板函数参数推导为我们提供了一个简单的助手：
ibarrondchanged the titleInstalling Pyfhel 2.3.1. error: ‘unique_lock’ in namespace ‘std’ does not name a template type [duplicate]Aug 2, 2022 Author SerhatBahcommentedAug 2, 2022 Sign up for freeto join this conversation on GitHub. Already have an account?Sign in to comment...