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This article mainly explains "how to use the mutex of Category 11". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn how to use the mutex of Category 11.

Threading is added to Cellular resources 11, and multithreading is introduced, which is accompanied by a mutually exclusive operation of multithreaded resources. For the use of locks, there is a headache, that is, after adding the lock, it is easy to forget to unlock, so the program may cause deadlock. Lock_guard has been added to Clippers 11, so that you don't have to pay attention to unlocking!

The principle is like this: this is to take advantage of the characteristics of C++ (destructor), the usage is to declare a lock_guard object at the beginning of the function, locking is enabled in the constructor, and when the function ends, the scope of the lock_guard object ends, automatically destructs, the lock is automatically released when destructing! Isn't it easy to worry?

# include / * std::mutex, std::lock_guard*/#include

Std::mutex mutex

Int counter = 0posivoid testFunc () {/ / lock_guard mutex locking std::lock_guard lockGuard (mutex) within the scope; / / function body counter++;} / / when the function ends, the scope ends and is automatically released

Int main () {testFunc (); std::cout

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