[Python-Dev] Last chance!

[Christian Tismer]

Guido van Rossum wrote:

...

> I saved the message, but haven't had the time yet to think things
> through.
> 
> I *did* notice at least one case where using f_tstate might actually
> be a mistake: theoretically it's possible that two or more threads
> alternate calling next() on a generator (if they wrap it in a critical
> section); AFAICT the f_tstate is never updated.

Right, f_tstate is never updated.
I think there is another inconsistent
situation, which can be created easily.
If a generator is run by a different thread
than it's creator, then the frame is run in that
other thread. eval_fame correctly uses tstate,
but if tracing is activated, call_trace uses
frame->f_tstate for no obvious reason, which
will probably mess up the tracing flags of the wrong
thread.

ciao - chris
-- 
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