NetNews Usenet Archive 1992 #19/NN_1992_19.iso/spool/comp/sys/mac/programm/14852

Internet Message Format | 1992-09-01 | 1.6 KB

Path: sparky!uunet!haven.umd.edu!darwin.sura.net!zaphod.mps.ohio-state.edu!rpi!bu.edu!transfer!ceylon!choffman.gte.com!user
From: [e-mail] (Chuck Hoffman)
Newsgroups: comp.sys.mac.programmer
Subject: Sound Manager Callback
Message-ID: <[e-mail]>
Date: 1 Sep 92 19:55:02 GMT
Sender: [e-mail]
Followup-To: comp.sys.mac.programmer
Organization: GTE Laboratories
Lines: 24

I'm just getting into the Sound Manager and am using the simple note
synthesizer.  I created a sound resource with ResEdit (created my own 'snd
' template) and the sound plays fine from ResEdit and my program.  Playing
asynchronously.  When the sound is done, I have a CallBackCmd to invoke my
callback routine which simply sets a flag so that I can later dispose of
the channel and release the sound resource.  I've done this by putting the
callback command at the end of the sound resource, and by using
SndDoCommand to insert into the buffer.  In both cases, it works correctly
about 2 of 3 times.  Can't set a THINK C debugger breakpoint in the
callback routine because of crashes (a conflict with the memory manager?),
but the main event loop sees the variable as if it has not been set.  I've
tried code updating the flag (in a global variable) directly, and I've
tried passing the address of the variable to the subroutine and getting at
it that way.  Same symptom no matter what.  Any ideas?


Chuck Hoffman
[e-mail]
GTE Laboratories, Waltham, Massachusetts, USA
[phone]
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I'm not sure why we're here, but I am sure that while we're here we're
supposed to help each other.
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