[Python-ideas] Ideas towards GIL removal

Greg Ewing greg.ewing at canterbury.ac.nz
Sun Apr 15 13:37:15 CEST 2007

Josiah Carlson wrote:

> Certainly, but thread B isn't the owning thread, thread A was the owning
> thread, and by virtue of decrefing its thread count to zero, acquiring
> the GIL, and checking the global refcount to make sure that either
> someone else is responsible for its deallocation (global refcount > 0),
> or that thread A is responsible for its deallocation (global refcount ==
> 0).

Thread B holding the GIL doesn't help, because the
local refcount is not covered by the GIL. Thread A
must be able to assume it has total ownership of the
local refcount, otherwise there's no benefit in
the scheme.


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