[pypy-dev] PyPy JIT & C extensions, greenlet

Christian Tismer tismer at stackless.com
Tue Sep 28 16:39:38 CEST 2010

  On 9/27/10 2:29 PM, Andy wrote:
> Why wouldn't pypy work with greenlet but would work with Stackless? greenlet calls itself a spin-off of Stackless. Isn't greenlet a subset of Stackless without the scheduling? Could you explain a bit more?

This is a deep misconception. Neither stackless nor greenlets
work with PyPy. Instead, a special coroutine version was written
for PyP's RPython, and then Stackless was written as an application
module. There is a greenlet implementation as well.

They both rely on the stack unwinding, which is not yet implemented
for the Jit.

The original greenlets and stackless have some similarities, since
they use the same tricks to modify the stack in assembly. This is
not related to PyPy, this reasoning is just the improper level.

ciao - chris

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