On Mon, Apr 16, 2007 at 10:07:37PM +0200, Vincent Torri wrote: > On Mon, 16 Apr 2007, Brian Mattern wrote: > >The following will not work: > > prop1_fetch(); > > prop2_fetch(); > > prop1_get(); > > prop2_get(); > >(both get() calls will use the reply from prop2_fetch()) > > Yes, that last one will not work, and it is in purpose. The reason : when > you ask for a reply, you want to use the informations returned by the X > server. So there is absolutely no interest in calling _fetch if you don't > plan to use the corresponding _get just after.
in that case, could you wrap up the _fetch() call into the _get() one, and get rid of the global that stores the reply between the two calls? > >B) although a bunch of prefetch() calls can be queued up, the > >corresponding fetch() calls must occur in the same order. > >e.g. one must do: > > /* queue up some requests */ > > prop1_prefetch(); > > prop2_prefetch(); > > > > /* some time later */ > > prop1_fetch(); > > prop1_get(); > > prop2_fetch(); > > prop2_get(); > > yes. It is important as the X server assure you that the replies are sent > in the same order than the requests. You might want different order, but > you will maybe have some problems. I can't do much more as it's in X > Window spec :) The problem i see is that for prefetch to really serve any purpose, the code has to hit the event loop between prefetch and fetch/get. It will be hard to guarantee that no code gets called in between that does a full prefetch/fetch/get cycle (which would then be out of order). I haven't looked at xcb's api, but what are the cookies for if not to allow one to fetch in a different order than prefetched? Brian ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ enlightenment-devel mailing list enlightenment-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/enlightenment-devel
