-=> Quoting Peter Fitzsimmons to Phil Crown <=- 

 PC> Do I not have to worry about blocking an Object windows queue as I do the
 PC> main thread's queue?

 PF> No.

 PF> The problem is this:  certain system messages (keyboard, some
 PF> mouse,focus changes) are _not_ sent on any applications queue -- they
 PF> are sent on a special "system input queue",  of which there is only
 PF> one.   If an application is not able to process one of these messages
 PF> for some reason,  pm is "hung" (not really,  just the
input queue). 
 PF> A queue thread that has no windows (or a window descended from
 PF> HWND_OBJECT (which is just a layer of indirection you don't really
 PF> need)) will never receive a message from the system input queue,  and
 PF> can not, therefore,  tie it up. 
 PF> Your design is good.  Your HWND_OBJECT messages can take as long as
 PF> you like,  as long as the messages are posted to it.

Thanks for clearing that up.

I've seen in the OS2 Echo that fixpack 16 is supposed to address the single
input queue problem.  Does this mean we won't have to worry about the 1/10th
second rule anymore?

Phil
Fido:  1:124/8014.1 | Internet:  phil.crown{at}bluecafe.com


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