On Saturday 23 June 2007 15:08, Tom Phoenix wrote:
> On 6/23/07, Michael Scondo <[EMAIL PROTECTED]> wrote:
> > sub thread1{
> > print "1\n";
> > lock $x;
> > print "locked x: 1\n";
> > cond_wait $x;
>
> Can't get past here until $x is signalled by another thread, and
> unlocked by all other threads.
>
> As written, this is the end-of-scope for the lock on $x (as well as
> the one on $y). But unless some third thread can rescue these first
> two, they seem to be deadlocked, with the first waiting for $x to be
> unlocked and the second waiting for $y to be signalled.
>
Thanks a lot for you explanation !
I didn't read the manual carefully enough....
Therefore I didn't realize that cond_wait locks a variable again AFTER it has
been signalled.
> As you discovered, using the inner braces will release the lock on $x
> soon enough to avoid the deadlock.
>
> By the way, thanks greatly for the detailed, self-contained test case;
> it showed exactly what you were doing.
>
DNRTFM
Did not read the fucking manual...
Thanks again for your help,
Michael
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