Re: GTK frame changes

["Jan Djärv" <jan.h.d@swipnet.se>]

grischka skrev:
> Jan Djärv wrote:
>> XSync sends a request to the server and waits for a reply.  The resize
>> request is sent before that, so the resize should be handeled before 
>> the XSync reply is sent.
> 
> Yes, but this reply is something in the sense of the X protocol, not
> in the sense of ConfigureNotify.  It just means that the X server got
> the resize message when XSync returns.   It doesn't mean at all that
> a ConfigureNotify is already in the client queue let alone that emacs
> now knows how big it is.
> 

The XProtocol specification (the oldest I have is R6.8, the newest is 7.4, 
they say the same thing) says this:

"Whether or not a server is implemented with internal concurrency,
the overall effect must be as if individual requests are executed to 
completion in some serial order,
and requests from a given connection must be executed in delivery order
(that is, the total execution order is a shuffle of the individual streams).
The execution of a request includes validating all arguments,
collecting all data for any reply,
and generating and queueing all required events.
However, it does not include the actual transmission of the reply and the events.
In addition, the effect of any other cause that can generate multiple events
(for example, activation of a grab or pointer motion) must effectively 
generate and queue all required events indivisibly with respect to all other 
causes and requests.
For a request from a given client,
any events destined for that client that are caused by executing the request
must be sent to the client before any reply or error is sent."

I interpret this as for a given X connection, all requests are run to 
completion and replies and events are queued in order.  Since XSync waits for 
the reply, it also means that after XSync has returned, events and replies 
generated by previous requests have indeed arrived.

	Jan D.