Author mrmekon
Recipients mrmekon, ronaldoussoren
Date 2011-12-08.20:26:13
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Message-id <1323375974.18.0.406983892582.issue13558@psf.upfronthosting.co.za>
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The multiprocessing package appears to spawn a new process by calling only fork().  Apple's CoreFoundation libraries (and possibly more, I do not know the full extent) *require* new processes to be spawned with the full fork()+exec*() combo.

When using PyObjC to access native Mac libraries, Python's multithreading library is not usable.  The error thrown is:

------------------------
The process has forked and you cannot use this CoreFoundation functionality safely. You MUST exec().
Break on __THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONALITY___YOU_MUST_EXEC__() to debug.
------------------------

Test code: https://gist.github.com/1448398
History
Date User Action Args
2011-12-08 20:26:14mrmekonsetrecipients: + mrmekon, ronaldoussoren
2011-12-08 20:26:14mrmekonsetmessageid: <1323375974.18.0.406983892582.issue13558@psf.upfronthosting.co.za>
2011-12-08 20:26:13mrmekonlinkissue13558 messages
2011-12-08 20:26:13mrmekoncreate