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From: mykes@amiga0.SF-Bay.ORG (Mike Schwartz)
Newsgroups: comp.sys.amiga.programmer
Subject: Re:  Window Waiting (was <None> )
Message-ID: <mykes.2894@amiga0.SF-Bay.ORG>
Date: 27 May 91 07:28:00 GMT
References: <1991May24.102345.1@wombat.newcastle.edu.au> <1991May24.092943.31027@kuhub.cc.ukans.edu> <21912@cbmvax.commodore.com>
Organization: Amiga makes it possible
Lines: 67

In article <21912@cbmvax.commodore.com> bj@cbmvax.commodore.com (Brian Jackson) writes:
>In article <1991May24.092943.31027@kuhub.cc.ukans.edu> markv@kuhub.cc.ukans.edu writes:
>>
>>There are two solutions.  One, if you only wan't to update the display
>>when your window is active, and if you aren't real picky about
>>precision, try INTUITICKS messsage.  I do this to update a clock
>>counter, recheck memory, like this:
>>
>>    while(!QuitFlag) {
>>	WaitPort(MyWindow->UserPort);
>>	while ((MyMsg = GetMsg(MyWindow->UserPort)) != NULL) {
>>	    switch(MyMsg->Class) {
>>		case INTUITICK:
>>			if((TickCount++) % 10) == 0) {
>>				DoUpdateStuff();
>>			}
>>			break;
>>		case CLOSEWINDOW:
>>			QuitFlag = FALSE;
>>			break;
>>		/* ... etc ... */
>>	    }
>>	    ReplyMsg(MyMsg);
>>	}
>>    }	
>>
>>Mark Gooderum
>
>The only change that I would make to this is that the ReplyMsg() call
>should come much sooner.  Let Intuition have it's message back asap.
>
>	ULONG class ;
>
>	...
>
>	while((MyMsg = GetMsg(MyWindow->UserPort)) != NULL) {
>		class = MyMsg->Class ;   /* make a local copy */
>		ReplyMsg(MyMsg) ;        /* reply asap        */
>		switch(class) {
>			...
>		}
>	}
>
>If 'DoUpdateStuff()' is large, you hang onto Intuition's message
>for a long time. If Intuition can't find an existing message to use
>for the NEXT thing it wants to send to you, it will allocate memory
>for a new one rather than use one already in existance. 
>
>Brian
>

Or even better is to use a structure assignment to copy the entire contents
of the message to a private message struct before replying...

> -----------------------------------------------------------------------
>/ Brian Jackson  Software Engineer, Commodore-Amiga Inc.    GEnie: B.J. \
>\ bj@cbmvax.cbm.commodore.com      or     ...{uunet|rutgers}!cbmvax!bj  /
>/ "Anyone considering the purchase of a high-end Macintosh or IBM-      \
>\ compatible computer should try an Amiga 3000 for a few hours before   /
>/ making the final decision." - Consumer Reports ('91 Buying Guide)     \
>-------------------------------------------------------------------------

--
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* I want games that look like Shadow of the Beast  *
* but play like Leisure Suit Larry.                *
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