On Tue, May 18, 2010 at 9:12 AM, Iñigo Martínez <[email protected]>wrote:
>
> I mean, before waiting on a condition, is usual to lock the mutex used
> on the condition, so if the thread is waiting and the mutex locked,
> another thread will not be able to lock the same mutex to wake up the
> thread with cond, blocking each other.
>
and to clarify this point: when a thread blocks ("sleeps") in order to wait
for a condition, it releases the mutexes that was passed to g_cond_wait().
then, before it is woken again, the thread system reacquires the mutex on
behalf of the thread, so that when it returns from g_cond_wait(), the mutex
it held again.
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