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SubjectRe: [RFC] eventfd: add EFD_AUTORESET flag
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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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