On Wed, 8 Jun 2005, Arnaud Bergeron wrote:
> For a threaded network application I'm developping, I have to watch
> the number of concurrent connections. I currently use this code:
>
> if (curconns < maxconns) {
> curconns++;
> }
> else {
> pthread_cond_wait(&conns_is_at_max, &useless_mutex);
> continue;
> }
>
> curconns is decremented by other threads each time a connection is
> finished and is only incremented in the main thread.
>
> I use a condition variable to know when it is decremented so that I
> can restart the loop and accept the connection.
>
> I don't need a mutex but it seem the pthread code requires one. The
> manpages on pthreads are very scarce. Is there a better/simpler way
> to do this?
i don't know how you came to that conclusion, but hello race condition.
yes, you need a mutex. use one.
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