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

["Michael S. Tsirkin" <mst@redhat.com>]

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