[Gllug] Programming: Atomic Increment/Decrement

[Dave Cridland]

On Wed, 2002-08-07 at 14:27, Jonathan Dye wrote:
> > isnt that what you use a mutex for?
> > 
> > pthread_mutex_init(3)
> 
> You _can_ use a mutex to protect the increment/decrement but it is usually
> quite heavyweight.  A mutex is good if you are doing more than a simple
> increment or decrement.

Are you essentially talking about a semaphore of some sort? I'm not
saying you are, mind, but often inc/dec atomicity problems can be done
with semaphores.

Unless you want them to go below 0, of course.

Dave.


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