Messages in this thread | | | Date | Sun, 23 Aug 2009 18:51:10 +0200 | From | Paolo Bonzini <> | Subject | Re: [PATCH 0/2] eventfd: new EFD_STATE flag |
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On 08/23/2009 04:30 PM, Michael S. Tsirkin wrote: > On Sun, Aug 23, 2009 at 04:40:51PM +0300, Avi Kivity wrote: >> On 08/23/2009 04:36 PM, Michael S. Tsirkin wrote: >>> More important here is realization that eventfd is a mutex/semaphore >>> implementation, not a generic event reporting interface as we are trying >>> to use it. >>> >> >> Well it is a generic event reporting interface (for example, aio uses it). > > Davide, I think it's a valid point. For example, what read on eventfd > does (zero a counter and return) is not like any semaphore I saw.
It is similar to Win32 events (which can be used like contorted mutexes to sync two processes).
Paolo
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