[PATCH xserver 07/24] os: Add NotifyFd interfaces

[Keith Packard]

Alan Coopersmith <alan.coopersmith at oracle.com> writes:

> On 09/20/15 11:16 PM, Keith Packard wrote:
>> This provides a callback-based interface to monitor file
>> descriptors beyond the usual client and device interfaces.
>>
>> Modules within the server using file descriptors for reading and/or
>> writing can call
>>
>>      Bool SetNotifyFd(int fd, NotifyFdProcPtr notify_fd, int mask, void *data);
>>
>> mask can be any combination of X_NOTIFY_READ and X_NOTIFY_WRITE.
>
> Now that you've included the mask, should we mark
> 	http://patchwork.freedesktop.org/patch/10692/
> as superseded by this patch?

I'm offline at present, but if that's what I think it is, then yes :-)

> Any memory of what you wanted to use your proposed AddWriteSocket() API for
> all those years ago?

Ajax mentioned Xvnc as a prime candidate, which is why I added this part
of the API.

I also figured out that I could do the migration away from select(2)
by rewriting all of the current file descriptor stuff in terms of this
new API, so write-blocked clients will end up using this during that
transition.

-- 
-keith
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