Looking for xshmfence example code

[Theo Veenker]

On 17/02/18 18:31, Clemens Eisserer wrote:
> Hi,
> 
> I would like to use XShmPutImage to upload streaming data to Pixmaps,
> however the XSHM extension lacks, as far as I can see, the ability to
> notify the client when the actual ShmPut-request has been processed
> and the client can start modifying a shared memory segment again.

XShmCompletionEvent?

I found this in some old code of mine...

First do:
shmevid = XShmGetEventBase(dpy) + ShmCompletion;

Then in event loop:
if (xevent.type == shmevid) {
	XShmCompletionEvent *e = (XShmCompletionEvent*)&event;
	printf("event %d on %lu\n", xevent.type, e->shmseg);
}

HTH

Theo