Comments on: alt.gil.die.die.die

By: Charl P. Botha

Charl P. Botha — Wed, 15 Jun 2005 22:43:27 +0000

I've submitted a patch to the VTK developers list that makes the VTK wrappings GIL friendly. See my mail: http://public.kitware.com/pipermail/vtk-developers/2005-June/003331.html

By: Charl P. Botha

Charl P. Botha — Wed, 15 Jun 2005 16:15:04 +0000

Just another note: if wrapped code calls the Py_BEGIN_ALLOW_THREADS and Py_END_ALLOW_THREADS around blocking code that doesn’t make any calls into the Python API, the GIL is released.

I either have to implement this for VTK, ITK and all other wrapped code that I want to use, or I have to figure out some other non-threading solution.

By: Charl P. Botha

Charl P. Botha — Wed, 15 Jun 2005 13:10:29 +0000

Thanks for the suggestion Rudolph. Stackless looks really cool, but it still doesn’t seem to solve my problem. Microthreads are useful for a different type of problem, but they also seem to switch at bytecode (or even python code) level. In my case, a single Python call is invoking long-running wrapped code. This really needs to be in a separate OS thread without a global lock preventing the rest of Python from continuing with its business.

By: Rudolph

Rudolph — Wed, 15 Jun 2005 08:28:32 +0000

Would Stackless Python perchance help? http://www.developer.com/open/article.php/10930_630761_2 http://www.stackless.com/