On Fri, Feb 25, 2011 at 03:18:37PM +0200, Rami Ylimäki wrote: > On 02/25/2011 02:48 PM, Daniel Stone wrote: > >On Fri, Feb 25, 2011 at 02:08:38PM +0200, Rami Ylimäki wrote: > >>Documentation of "C.2.1 XInitExtension" from Xlib manual says that > >>the Xlib specific extension number in XExtCodes is connection > >>specific, which makes sense, because the number is managed > >>internally in Xlib and not asked from server. Then "C.5.11 Deriving > >>the Correct Extension Opcode" says that a separate XExtCodes should > >>be maintained for each connection. > >> > >>So I think that one shouldn't assume that opcodes stay the same, > >>even though it seems to be so in practice. > >Er, really? How would sending requests then work without an event from > >the server telling you to round-trip and get the extension list again? > > > > Looks like I removed a little bit too much context when answering. > The original question was about whether one can trust that extension > opcodes are the same between connections. The answer seems to be > that there is no guarantee of that, because XExtCodes structure is > connection specific. Of course the opcodes should stay the same over > the lifetime of a connection but nobody guarantees, that > XInitExtension returns the same opcodes for different connections, > even though in practice it's so.
Oh, right. Yeah, not guaranteed at all. Cheers, Daniel
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