[Stackless] Tasklet cleanup?
tismer at stackless.com
Thu Jul 5 23:18:34 CEST 2012
Just as a note:
the PyPy stackless module was not really maintained in years, and I
remember I had a more compliant version prepared, but lost interest
after the Jit became unsuitable for the stackless version.
Now it's time to finalize and correct this, because a Jit-enabled
stackless is in reach, again.
Will try to get to it, soon.
cheers - Chris
On 7/5/12 8:42 PM, Hervé Coatanhay wrote:
> Hi all,
> I was playing with stackless.py from pypy. In that implementation
> kill() definitely raises an exception:
> Just so you know.
> On Fri, May 25, 2012 at 5:11 AM, Richard Tew <richard.m.tew at gmail.com
> <mailto:richard.m.tew at gmail.com>> wrote:
> On Sun, May 20, 2012 at 10:29 AM, Sylvain Prat
> <sylvain.prat at gmail.com <mailto:sylvain.prat at gmail.com>> wrote:
> > I tried to wrap my tasklet in a parent object which has the same
> > lifespan as my tasklet and has a __del__ function for cleaning
> up, but
> > I keep having problems with circular references (the wrapper/parent
> > object also provides the callable of the tasklet, i.e. a bound
> > that make the tasklet/parent object uncollectable (circular
> > : wrapper --> tasklet --> stackless machinery? --> callable stack
> > frame (bound method of wrapper) --> wrapper). Same problem when
> > to inherit from tasklet.
> > So, how can I clean up resources in tasklets? (I'm pretty sure I've
> > missed something obvious)
> Hi Sylvain,
> Kristjan having clarified that TaskletExit is definitely off the table
> for now, I'd like to make the response I should have when you first
> posted. Fix your circular references and __del__ should be fine.
> What I tend to do is use weak references, where applicable, in order
> to ensure that nothing keeps a tasklet alive except where I explicitly
> want. There is nothing internal to Stackless which will keep a
> tasklet alive without your implicit direction. If my tasklets are
> kept alive and I detect it, then I use gc.get_referrers(tasklet) to
> track down why.
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Christian Tismer :^) <mailto:tismer at stackless.com>
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