Subj : Re: A question about atomic_ptr
To   : comp.programming.threads
From : Chris Thomasson
Date : Mon Apr 18 2005 11:50 pm

> Chris Thomasson wrote:
>>> mfence fails with exception C000001E, "an attempt was made to
>>> execute an invalid lock sequence". Athlon XP 2800+.

Odd... I have successfully executed the mfence instructions on xeon 
(2/4/8-way) boxes. You should check if mfence is fully supported, use cpuid.




> This won't work as I don't compile with GCC, but if you are concerned 
> about
> compiler reordering, this is not an issue. I've looked at the disassembly
> and it's correct. The mfence instruction just causes an exception.

Anyone else having problems???

.