Messages in this thread | | | Subject | Re: [RFC] eventfd: add EFD_AUTORESET flag | From | Paolo Bonzini <> | Date | Wed, 12 Feb 2020 09:31:32 +0100 |
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On 29/01/20 18:20, Stefan Hajnoczi wrote: > + /* Semaphore semantics don't make sense when autoreset is enabled */ > + if ((flags & EFD_SEMAPHORE) && (flags & EFD_AUTORESET)) > + return -EINVAL; > +
I think they do, you just want to subtract 1 instead of setting the count to 0. This way, writing 1 would be the post operation on the semaphore, while poll() would be the wait operation.
Paolo
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