[Python-Dev] RFC: PEP 445: Add new APIs to customize Python memory allocators (original) (raw)

Victor Stinner victor.stinner at gmail.com
Wed Jun 19 17:49:02 CEST 2013

2013/6/19 Antoine Pitrou <solipsis at pitrou.net>:

On Wed, 19 Jun 2013 17:24:21 +0200

>> Drawback: the caller has to check if the result is 0, or handle the >> error. > > Or you can just call PyFatalError() if the domain is invalid.

I don't like PyFatalError(), especially when Python is embedded. It's safer to return -1 and expect the caller to check for the error case. I don't think you need to check for errors. The domain is always one of the existing constants, i.e. it should be hard-coded in the source, not computed.

Imagine that PyMem_GetBlockAllocator() is part of the stable ABI and that a new domain is added to Python 3.5. An application is written for Python 3.5 and is run with Python 3.4: how would the application notice that PyMem_GetBlockAllocator() does not know the new domain?

"I don't think you need to check for errors."

Do you mean that an unknown domain should be simply ignored?

Victor

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