Condition Variables
Condition variables enable threads to be synchronised via messages. They need the <condition_variable> header. One thread acts as a sender, and the other as a receiver of the message. The receiver waits for the notification from the sender. Typical use cases for condition variables are sender-receiver or producer-consumer workflows.
A condition variable can be the sender but also the receiver of the message.
| Method | Description |
|---|---|
cv.notify_one() |
Notifies a waiting thread. |
cv.notify_all() |
Notifies all waiting threads. |
cv.wait(lock, ...) |
Waits for the notification while holding a std::unique_lock. |
cv.wait_for(lock, relTime, ...) |
Waits for a time duration for the notification while holding a std::unique_lock. |
cv.wait_until(lock, absTime, ...) |
Waits until a time... |