Simple process synchronization question

Hi,

I have a relatively simple question about the best way to do process synchronization in C. I'm writing a multi-process application where I spawn multiple processes at the beginning using fork.

Each of these processes then goes into a while loop until some criteria is met. I now want to synchronize those processes so that they start each loop iteration at about the same time. I basically want something like a barrier that has to be reached before starting a loop iteration.

What is the easiest way to do that in C? I though about using semaphores, but not sure if this is the best solution.

Thanks,
Antriber

You can do this with semaphores. One process does a sem_wait at the top of the loop, and the other process does a sem_post when it's ready to start the loop.

OK, thanks. And I assume this will also work with more than 2 processes.

Quote:

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Originally Posted by AnTriber

OK, thanks. And I assume this will also work with more than 2 processes.

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Yeah.