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    From
    SubjectRe: deadlock avoidance?
    Date
    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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