C++

29.5    Waiting for Events with “condition_variable”

With mutexes and locks, you can go very far, and these form the basis of what you need to work with threads. Sometimes, however, handling mutexes and locks is cumbersome. With call_once, you have already seen an alternative way where the standard library assembles the basic building blocks into something new for you. There are a few more of these advanced tools that I will introduce to you here.

A typical scenario with multiple threads is that one produces data and the other waits for it to be ready for processing. These two can communicate with each other via a condition variable condition_variable.

// https://godbolt.org/z/c9x6xT8dr#include <thread>#include <mutex>#include <condition_variable> ...