22f
Subj : Re: Recursive mutexes
To   : comp.programming.threads
From : Chris Thomasson
Date : Tue Mar 29 2005 03:00 pm

> This may not be relevant (depending on your OS/hardware) - but the above 
> will not work on a multi-CPU system.  There is no memory barrier op before 
> the read of m_owner, so a cpu could read an out of date value from its 
> cache.

Yes, you are correct. It was a simple sketch. I believe the barriers would 
be extra overhead. If the target OS provides fast access to TLS then Alex's 
simple solution would be better.

.

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