Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!usc!apple!sun-barr!texsun!pollux!ti-csl!m2!holland
From: holland@m2.csc.ti.com (Fred Hollander)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Purge or Revert Resource?
Message-ID: <82279@ti-csl.csc.ti.com>
Date: 26 Jun 89 21:20:07 GMT
References: <82203@ti-csl.csc.ti.com> <689@biar.UUCP>
Sender: news@ti-csl.csc.ti.com
Reply-To: holland@m2.UUCP (Fred Hollander)
Organization: TI Computer Science Center, Dallas
Lines: 31

In article <689@biar.UUCP> trebor@biar.UUCP (Robert J Woodhead) writes:
>In article <82203@ti-csl.csc.ti.com> holland@m2.csc.ti.com (Fred Hollander) writes:
>>I want to revert a resource that is already loaded into memory by
>>reading the resource from the resource file and discarding any
>>changes.  I also want to keep the same handle to the resource.  Can
>
>So you can do something like this:
>
>	DetachResource(H);
>	DisposHandle(H);
>	H:=GetResource('DERF',0);
>
>to do your reversion.  I'm pretty sure that H will point to the same master
>pointer after the GetResource call.  IM-I has some diagrams in the Resource
>Manager chapter that explain DetachResource quite well.

It would be nice if it kept the same handle but, IM says (about
DetachResource) that a subsequent call to GetResource will cause a new
handle to be allocated.  Am I misunderstanding this?  Does it allocate
a new block (new pointer) but, actually keep the same handle?

Fred

______________________________________________________________________________
| Fred Hollander                 |                                           |
| Computer Science Center        |     "Ha ha ha ha ha ha, Ah what a day!"   |
| Texas Instruments, Inc.        |             -- Joker                      |
| Internet:    hollander@ti.com  |                                           |
| Telnet:      214/995-0696      |  The above statements are my own and not  |
| AppleLink:   D1392             |  representative of Texas Instruments.     |
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