From:	qball1723 AT aol DOT com (QBall1723)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Why should lock function
Date:	16 Dec 1997 19:54:07 GMT
Lines:	36
Message-ID:	<19971216195400.OAA22689@ladder02.news.aol.com>
NNTP-Posting-Host:	ladder02.news.aol.com
Organization:	AOL http://www.aol.com
References:	<Pine DOT A41 DOT 3 DOT 96a DOT 971210184935 DOT 49018A-100000 AT dante15 DOT u DOT washington DOT edu>
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

>Hi,
>	i am a novice user of DJGPP and writing codes in PMode. When I
>read other's source code of a mouse handler, I find that he locks some of
>his functions. Just like:
>
>static viod function()
>{
>.......
>}
>
>END_FUNCTION(function);
>
>void lock()
>{
>LOCK_FUNCTION(function);
>}
>
>Can someone tell me the rule of locking a function and what kind of
>functions should be locked. Thanx.
>
>
>KIM.
>
>

When memory starts "paging"... (i.e.: you're using virtual memory.. swapping
pages from/to your hard drive)... you have to lock some code and data...
otherwise you may crash...

A programming bud with more experience than I uses locking for code & data on
his: TimerInterruptHandler, KeyboardInterruptHandler,... stuff like that...


Jim the loiterer (wannabe PC game/graphics developer)
http://members.aol.com/qball1723/index.htm
[please don't hate me because I pay too much for poor internet service!!]

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