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PyMem_RawCalloc missing from cpython.mem #3047

wkschwartz opened this issue Jul 18, 2019 · 1 comment


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commented Jul 18, 2019

While cpython.mem contains the other raw allocators, it is missing PyMem_RawCalloc.


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commented Jul 18, 2019

PR welcome.

wkschwartz added a commit to wkschwartz/cython that referenced this issue Jul 20, 2019

Fix cython#3047: Add PyMem_(Raw)Calloc to cpython.mem
CPython added PyMem_RawCalloc and PyMem_Calloc in version 3.5. I did not
in include a version guard for 3.4 because PyObject_Calloc was also
added in 3.5 but it's already in this file without a version guard.

I updated comments for other functions to reflect PyMem_Calloc but not
PyMem_RawCalloc to match comments' currently only referencing
PyMem_Malloc and friends.

I did not modify Cython/Utility/ModuleSetupCode.c, where
PyMem_RawMalloc, PyMem_RawRealloc, and PyMem_RawFree are #defined for
Python 3.3 because (a) I couldn't figure out where these were being used
and (b) they're defined to their non-raw versions, which strikes me as
dangerous since the Raw versions allow use without the GIL but the
non-Raw versions do not.

Finally, I updated the tests in cpython_capi.pyx. I'm never sure when
compilers decide code is dead and just ignore it, so I tried actually to
write to the memory and return data from it. I can't figure out how to
run Cython's tests, so... fingers crossed.
@wkschwartz wkschwartz referenced a pull request that will close this issue Jul 20, 2019
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