From: pv AT cs DOT montana DOT edu (Paul Peavyhouse)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Question about future of Allegro.
Date: Thu, 20 Mar 1997 13:05:35 GMT
Organization: Montana State University
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Message-ID: <5gs5bt$etj@netra.montana.edu>
References: <3329E6C5 DOT 531E AT post DOT comstar DOT ru> <332C774C DOT 3E2C AT blackmagic DOT tait DOT co DOT nz>
NNTP-Posting-Host: esus.cs.montana.edu
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

In article <332C774C DOT 3E2C AT blackmagic DOT tait DOT co DOT nz>, billc AT blackmagic DOT tait DOT co DOT nz wrote:
>Dim Zegebart wrote:
>> 
>> Hi,
>> I deeply (I hope so ;) ) study your code dialling with
>> keyboard, mouse and timer. And also I study GUI part.
>> IMHO, it's lack of some messaging system. I already done
>> such a system with my previous work (not with Allegro and DJGPP).
>> Hardware interrupt handlers collect events and put them into
>> FIFO queue (separate queue for each device). And user write
>> functions for each type of hardware (software too) events which called
>> by SendMsg() in DispatchMsg() loop. Also, it's possible to
>> assign a priority level for each queue (what is first mouse, keyboard,
>> etc.) So, I can implement it in Allegro.
>> 
>> Any comments ?
>
>Sound's good and would be usefull for much more than just Allegro.
>
>Would you be willing to send me a copy of your code, as this sounds like
>somethink I could use in my kernel code (pure djgpp, no dos at all!).  I
>could port it to djgpp in gerneral as I port it to my os.

        Would this not be, generally, the same thing as multi-threading using 
priorities?  While there are thread libraries for DJGPP out there (I haven't 
played with threads in DJGPP yet) I think it might behoove Allegro to add 
this feature.  Playing with threads in Java, I like the simple approach to 
them (although setting priorities does not work under Win95 :< ).  There are 
only a handful of routines needed to implement a fully threadable class; but 
then the problem of synchronizing variables comes into play.  Dunno how this 
is managed in C/C++, but the implementation in Java is fairly complex.
        Has anyone played with any threading libraries for DJGPP?  Are they 
pretty good, or can it be implemented better?

                                                        PV


______________________________________________________________________________

 Paul Peavyhouse                          
 http://www.cs.montana.edu/~pv           
 email: pv AT cs DOT montana DOT edu                
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