Re: Does libX11 use shared memory between several clients?

2008-01-31 Thread Tristan Van Berkom 
On Jan 29, 2008 5:35 AM, Bin Chen [EMAIL PROTECTED] 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
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Re: Does libX11 use shared memory between several clients?

2008-01-29 Thread Tomas Carnecky 
Bin Chen wrote:
 Currently I am looking at libX11's source code, I am curios many
 libX11 doesn't send the message to the server but only modify some
 structure in the local memory, such as:

This is the gtk-app-devel list, not the place where you'd discuss libX11 
issues! You'll have more luck asking in [EMAIL PROTECTED]

tom
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Does libX11 use shared memory between several clients?

2008-01-28 Thread Bin Chen 
Hi,

Currently I am looking at libX11's source code, I am curios many
libX11 doesn't send the message to the server but only modify some
structure in the local memory, such as:

void
_XRegisterFilterByType(
Display *display,
Window window,
int start_type,
int end_type,
Bool (*filter)(
   Display*, Window, XEvent*, XPointer
   ),
XPointer client_data)
{
XFilterEventRec *rec;

rec = (XFilterEventList)Xmalloc(sizeof(XFilterEventRec));
if (!rec)
return;
rec-window = window;
rec-event_mask = 0;
rec-start_type = start_type;
rec-end_type = end_type;
rec-filter = filter;
rec-client_data = client_data;
LockDisplay(display);
rec-next = display-im_filters;
display-im_filters = rec;
display-free_funcs-im_filters = _XFreeIMFilters;
UnlockDisplay(display);
}

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?

Thanks.
Bin
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