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- Path: sparky!uunet!usc!news.service.uci.edu!unogate!mvb.saic.com!macro32
- From: Yaacov Fenster @ISO 882-3153 17-Nov-1992 0853
- Newsgroups: vmsnet.internals
- Subject: RE: Locking down a structure in C
- Message-ID: <9211170648.AA18702@vbormc.vbo.dec.com>
- Date: Tue, 17 Nov 92 07:48:20 MET
- Organization: Macro32<==>Vmsnet.Internals Gateway
- X-Gateway-Source-Info: Mailing List
- Lines: 44
-
- >
- > Here's another Open VMS Alpha AXP internals C question...
- >
- > I'm converting some MACRO to C, and am changing $DEFINI type
- > blocks of code to structures...and some of these need locking down, eg.
- >
- <Deleted>
- > range: .long zzzdat
- > .long zzzdat + zzz$k_len
- >
- > $lkwset_s inadr = range
- >
- >
- > Now, I'm trying to use a structure...
- >
- > static struct
- > {
- > int l_zeep
- > int l_zap
- > int l_zip
- > } zzz ;
- >
- > What would be the "best" way to "calculate" the address of the ends of
- > structures to place in a range array for calling sys$lkwset?
- >
-
- void *range[2] = {&zzz,&zzz+1};
-
- /* The +1 in C address arithmetic is really +1*(sizeof object pointing to) */
-
- This compiles and gives the correct answer under DEC C.
-
- > Lee K. Gleason N5ZMR
- > Control-G Consultants
- > gleason@mwk.uucp
- >
-
- Yaacov
- -------------------------------------------------
- Yaacov Fenster +(972)-3-9307239
- y.fenster@ieee.org
- fenster@taveng.enet.dec.com DTN 882-3153
- All the opinions voiced are mine alone and do not reflect anyone else's
- opinion. (Including Dec).
-