From: dvd@davidashen.net
To: 9fans@cse.psu.edu
Subject: Re: [9fans] qunlock
Date: Thu, 24 Jun 2004 01:11:54 +0500 [thread overview]
Message-ID: <90fc526d76991a36a045593f14155a90@davidashen.net> (raw)
In-Reply-To: <29dbd0842758b89af800a214a30c9fac@vitanuova.com>
> > calling qunlock on an unlocked QLock is no-op, isn't it?
>
> i'd have thought it best to regard it as best avoided.
> does it happen, or was it something you wanted to do?
>
I need to release a qlock in a criticial session guarded by another lock,
QLock p,q;
void x() {
qlock(&p);
if(...)
qunlock(&q);
qunlock(&p);
}
void y() {
qlock(&q);
qlock(&p);
qunlock(&p);
}
The question is whether the above is legal or should I write
if(...){
canqlock(&q);
qunlock(&q);
}
instead?
next prev parent reply other threads:[~2004-06-23 20:11 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-22 6:04 dvd
2004-06-22 8:06 ` C H Forsyth
2004-06-22 9:09 ` C H Forsyth
2004-06-22 14:19 ` ron minnich
2004-06-22 14:38 ` boyd, rounin
2004-06-22 15:13 ` Rob Pike
2004-06-23 20:11 ` dvd [this message]
2004-06-23 20:24 ` Rob Pike
2004-06-23 21:00 ` dvd
2004-06-23 21:12 ` boyd, rounin
2004-06-24 7:19 ` Fco. J. Ballesteros
2004-06-24 10:58 ` dvd
2004-06-24 7:34 ` Fco. J. Ballesteros
2004-06-24 11:02 ` dvd
2004-06-24 11:14 ` Fco. J. Ballesteros
2004-06-24 12:18 ` dvd
2004-06-24 13:09 ` Fco. J. Ballesteros
2004-06-24 13:30 ` Sape Mullender
2004-06-24 13:47 ` boyd, rounin
2004-06-24 13:42 ` boyd, rounin
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