Re: [PATCH-RFC 2/2] eventfd: EFD_STATE flag

Michael S. Tsirkin
2009-08-04T08:55:16Z

On Tue, Aug 04, 2009 at 11:53:03AM +0300, Avi Kivity wrote:
> On 08/03/2009 07:57 PM, Michael S. Tsirkin wrote:
>>> Why not do it at the point of the write?
>>>
>>> if (value != ctx->count) {
>>> ctx->count = value;
>>> wake_things_up();
>>> }
>>>
>>
>> What if write comes before read?
>>
>
> The read will get the new value.

Yes :) But how does read know it should not block?

> --
> error compiling committee.c: too many arguments to function