Simple process synchronization question

This is a discussion on Simple process synchronization question within the C Programming forums, part of the General Programming Boards category; Hi, I have a relatively simple question about the best way to do process synchronization in C. I'm writing a ...

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    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

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

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    Quote Originally Posted by AnTriber View Post
    OK, thanks. And I assume this will also work with more than 2 processes.
    Yeah.
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