mutex locking

[quagsire]

If I use mutex blocking like this

pthread_mutex_lock (&send_mutex);
try
{
Send( pBuffer, ulMsgSize );
}
catch(...)
{
pthread_mutex_unlock (&send_mutex);
throw;
}
pthread_mutex_unlock (&send_mutex);

will the mutex be unblocked if the thread terminates inside the Send function?

I know with semaphores you can use the SEM_UNDO flag for that purpose, but how can you do it with mutexes?

[Hammer]

Based on what is says here (http://www.rt.com/man/pthread_mutex_lock.3.html), I'm going to guess the lock isn't released until you explicitly do so.
An equal number of pthread_mutex_unlock operations must be performed before the mutex returns to the unlocked state.

Why not write a small program and test your theories.

[biosninja]

mutex blocking

what's that? never heard of it

[Jaguar]

See mutex (http://foldoc.doc.ic.ac.uk/foldoc/foldoc.cgi?query=mutex)