From: dvd@davidashen.net
To: 9fans@cse.psu.edu
Subject: Re: [9fans] qunlock
Date: Thu, 24 Jun 2004 15:58:49 +0500 [thread overview]
Message-ID: <b4b080851299e6d9b095d97cb2b7f834@davidashen.net> (raw)
In-Reply-To: <ac681a2a7a84be85080152b19f4f1f54@plan9.escet.urjc.es>
> Maybe it's just that it's too early and I got soo few coffee, but,
> do meant this, didn't you?
No, I didn't; I mean that under certain condition each of the processes
steps aside and opens the way for the other one until the other one executes
at least once.
The original code does exactly that. Your changes just spin each of the processes once the corresponding condition becomes true.
>
>> void
>> A()
>> {
>
> qlock(a);
> againA:
>
>> qlock(q);
>> if(x) {
>> qunlock(q);
>> goto againA;
>> }
> ....
>
>
>> void
>> B()
>> {
>
> qlock(b);
> againB:
>
>> qlock(q);
>> if(y){
>> qunlock(q);
>> goto againB;
>> }
> ....
next prev parent reply other threads:[~2004-06-24 10:58 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
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 [this message]
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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