Message411999
I close the issue. While this issue is not fully fixed, it's a milestone of my "stable ABI" goal. I prefer to address remaining issues in new separted issues.
This issues is not fully fixed, there are are still a 4 macros which access directly PyTypeObject members:
* PySequence_ITEM()
* _PyObject_SIZE()
* _PyObject_VAR_SIZE()
* PyType_HasFeature() (if Py_LIMITED_API is not defined)
PySequence_ITEM() and PyType_HasFeature() are important for performance, I prefer to have a PEP before changing these two functions.
_PyObject_SIZE() and _PyObject_VAR_SIZE() should be made public with a better name like PyObject_SizeOf() and PyVarObject_SizeOf(). But I prefer to do that in a separated issue.
IMO it would be interesting to merge the PyHeapTypeObject structure into the PyTypeObject structure:
https://bugs.python.org/issue46433#msg411167
And make the PyTypeObject opaque: deprecate static types and promote the usage of heap types in C extensions. That's a big project which may be splitted into multiple issues and the final change may need its own PEP. |
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Date |
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2022-01-28 14:25:55 | vstinner | set | recipients:
+ vstinner, rhettinger, ronaldoussoren, corona10, miss-islington, shihai1991, erlendaasland |
2022-01-28 14:25:55 | vstinner | set | messageid: <1643379955.34.0.286239644719.issue40170@roundup.psfhosted.org> |
2022-01-28 14:25:55 | vstinner | link | issue40170 messages |
2022-01-28 14:25:55 | vstinner | create | |
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