Hugh Gibson <hgibson@abling.com> added the comment:
> I doubt subclassability of RLock matters but who knows, people do code
> things.
I've recently done this to implement potential deadlock detection. I
keep a record of the sequences of acquired locks, find unique
sequences, then check for conflicts between each sequence. There's not
much overhead and it highlighted some potential deadlocks where lock A
and B were acquired AB in one route through code and BA in another
route. The algorithm is a simplified version of that used in Linux -
see http://www.mjmwired.net/kernel/Documentation/lockdep-design.txt
Hugh
----------
nosy: +hgibson50
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> I doubt subclassability of RLock matters but who knows, people do code
> things.
I've recently done this to implement potential deadlock detection. I
keep a record of the sequences of acquired locks, find unique
sequences, then check for conflicts between each sequence. There's not
much overhead and it highlighted some potential deadlocks where lock A
and B were acquired AB in one route through code and BA in another
route. The algorithm is a simplified version of that used in Linux -
see http://www.mjmwired.net/kernel/Documentation/lockdep-design.txt
Hugh
----------
nosy: +hgibson50
_______________________________________
Python tracker <report@bugs.python.org>
<http://bugs.python.org/issue3001>
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