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From: milamber@caen.engin.umich.edu (Daryl Cantrell)
Newsgroups: comp.sys.amiga.programmer
Subject: Re: Window Waiting (was <None> )
Message-ID: <WA1+Y0#@engin.umich.edu>
Date: 24 May 91 20:43:58 GMT
References: <1991May24.102345.1@wombat.newcastle.edu.au> <1991May24.092943.31027@kuhub.cc.ukans.edu>
Organization: University of Michigan Engineering, Ann Arbor
Lines: 42

In article <1991May24.092943.31027@kuhub.cc.ukans.edu> markv@kuhub.cc.ukans.edu writes:
[...]
>#define BIT(x)	(1L << x)
>ULONG	WakeupMask;
>#define WindowBit BIT(MyWindow->UserPort->mp_Sigbit)
>#define TimerBit  BIT(TimerReplyPort->mp_Sigbit)
>
>WakeupMask = Wait(WindowBit | TimerBit); 
>
>if (WakeupMask & WindowBit) {
>	/* Do IDCMP stuff */
>}
>if (WakeupMask & TimerBit) {
>	/* Do update stuff */
>}
[...]

  This is close, but there is one problem.  From 1.3 AutoDocs, exec.library/
WaitPort : "It is possible to get a signal for a port WITHOUT a message
showing up.  Plan for this.".  What I usually do is something like:

struct Message *Msg;

FOREVER
   {
   Wait(WindowBit | TimerBit);
   while (Msg = GetMsg(MyWindow->UserPort))
      DoIDCMP(Msg);
   while (Msg = GetMsg(TimerReplyPort))
      DoTimer(Msg);
   }

>Mark Gooderum			Only...		\    Good Cheer !!!
>Internet: markv@kuhub.cc.ukans.edu


--
+---------------------------------------+----------------------------+
|   // Daryl S. Cantrell                |   These opinions are       |
| |\\\ milamber@caen.engin.umich.edu    |    shared by all of    //  |
| |//  Evolution's over.  We won.       |        Humanity.     \X/   |
+---------------------------------------+----------------------------+