How do you determine if child threads have completed

Question

I am using multiple threads in my application using while(true) loop and now i want to exit from loop when all the active threads complete their work.

Answer 1

Assuming that you have a list of the threads themselves, here are two approaches.

Solution the first:

Use Thread.Join() with a timespan parameter to synch up with each thread in turn. The return value tells you whether the thread has finished or not.

Solution the second:

Check Thread.IsAlive() to see if the thread is still running.

In either situation, make sure that your main thread yields processor time to the running threads, else your wait loop will consume most/all the CPU and starve your worker threads.