Re: Does libX11 use shared memory between several clients?

["Tristan Van Berkom" <tristan van berkom gmail com>]

On Jan 29, 2008 5:35 AM, Bin Chen <binary chen gmail com> wrote:
[...]

>
> I can't see any code to transfer modified "display" structure to the
> server, this API is invoked by a XIM server so obviously the register
> stuff need to be accessed by other process, is there any shared memory
> trick in libX11?


Yes, but this is not one of those tricks I would think.

When connecting to the X server, XOpenDisplay establishes
a connection and returns a locally allocated Display structure
to be used for all your api calls. All commands to the X server
are sent and queued so to speak on the display.

I dont know much about the guts of XIM but it looks like
_XRegisterFilterByType doesnt need to tell the server anything...
only needs to tell Xlib locally how to handle input when it comes
from the X server.

Cheers,
                         -Tristan