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- Path: sparky!uunet!sun-barr!cs.utexas.edu!rutgers!bobsbox.rent.com!grayhawk.rent.com!rich
- From: rich@grayhawk.rent.com (Richard Harms)
- Newsgroups: comp.sys.mac.programmer
- Subject: vblCount and Macintosh Programming Secrets
- Message-ID: <Bt1wyG.MnL@grayhawk.rent.com>
- Date: 16 Aug 92 00:49:27 GMT
- Organization: Des Moines, Iowa, Public Access Unix; 515/277-6753
- Lines: 18
-
- On page 501 is the code for a subroutine called MySpinner... In it, the
- VBLTask field vblCount is reset to a non-zero value only if CrsrBusy is
- equal to zero. My question is, if CrsrBusy is a non-zero value, and the
- vblCount field isn't reset to something non-zero, won't that result in
- the VBL task failing to ever execute again?
-
- From MPW 411:
- >The task must then reset vblCount, or its entry will be removed
- >from the queue after it has been executed.
-
- Which would seem to indicate this is true...
-
- -rh
- --
- Richard R. Harms Internet: r-harms@grayhawk.rent.com
- 1217 24th, Suite 49 UUCP: {...}!{rutgers!bobsbox}!grayhawk!rich
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