Question about a thread

athena0523

There is an endless loop in thread A. The exit of the endless loop depends on thread B running to somewhere A. Currently, the busy waiting method is used, that is, the loop exit flag flag is modified at point A in thread B. Endless loop measurement
Try the mark and exit. But when I'm so busy waiting for too much time, I want to change the method.

I want to use the condition variable method, but waiting for the arrival of the signal in the loop of thread A will hang up A, because A must run constantly, so it cannot be suspended.

Is there any way for everyone?
Thank you!

珈蓝易拉罐

I don’t understand, since A wants to "run non-stop" and can't stop, why can't it be detected in time during operation?

8611250894

You can add pthread_cond_wait

When B runs for a certain period of time, issue pthread_cond_signal to activate A.


For reference, I don’t know if it works for you

8611250894

However, waiting for the arrival of the signal in the loop of thread A will suspend A. Since A must run continuously, it cannot be hung up. ???

why?