Subj : Re: Boss Told Me You Can't Use Semaphore, But I Have To Do Something like It!
To   : comp.programming.threads
From : Sean Kelly
Date : Tue Jul 19 2005 03:11 pm

Instead of a 1, why not write the app's PID into this memory segment.
So each app waits for 0, writes its PID, then reads to see if its PID
is set.  If so, it continues.  Not as nice as a semaphore, but it
addresses the clobbering problem you mention.  Though I'd still ask for
an explanation regarding the "no semaphores" rule.  In my experience,
such requirements are often unfounded.


Sean

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