Re: deadlock avoidance?

Davide Libenzi (dlibenzi@maticad.it)
Wed, 8 Dec 1999 01:11:20 +0100

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Wednesday, December 08, 1999 1:05 AM
Alan Cox <alan@lxorguk.ukuu.org.uk> wrote :
> > See at this implementation ( optimization = 0.0 ) :
> Correctness ditto 8)
>
> > ++lock->count; \
>
> These need to use atomic operations - dec and not zero etc
>

Hi Alan,

++lock->count;

is executed only "if (lock->pid == getpid())" == the task already own
the lock.

Cheers,
Davide.

-- "Debian, the Freedom in Freedom."

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