Alexander Terekhov wrote:
Michael Glassford wrote:
I've just checked in changes to Win32 implementations of the mutex and recursive_mutex classes. They now use a Win32 critical section instead
MS critical section (current implementation) doesn't perform well if there is contention.
So I've heard.
They handoff ownership. You can build more efficient mutex (with all three lock/trylock/timedlock operations) using atomic swap/xchg and auto-reset event.
I hope to look into this at some point, but for now have higher-priority items on my Boost.Threads task list. Do you have a full-fledged implementation for such a beast? I remember you posting sample code some time back, but don't remember how complete it was.
It will work on 386 (no CAS required)... but I just can't stop scratching my head over mysterious lack of xchg.rel on Itanic (they only have xchg.acq).
regards, alexander.
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