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ffi cleanup: object.h #1429

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merged 8 commits into from Feb 20, 2021
Merged

ffi cleanup: object.h #1429

merged 8 commits into from Feb 20, 2021

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nw0
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@nw0 nw0 commented Feb 14, 2021

This one's a fairly big change to account for the new cpython/object.h file.

Deprecate some FFI definitions which are not in the API

  • PyObject_Check
  • PySuper_Check
  • FreeFunc (note: there's also a freefunc which is subtly different -- fixed _PyEval_RequestCodeExtraIndex, which takes a freefunc as an argument)

I thought the INCREF, DECREF, ... methods were a bit off. See review (soon). EDIT: will open new issue this is fine

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@davidhewitt davidhewitt left a comment

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Looks great, thanks very much again. This is definitely one of the more awkward files; as always thank you for your diligent reconciliation.

src/ffi/object.rs Show resolved Hide resolved
Comment on lines 371 to 383
#[cfg(py_sys_config = "COUNT_ALLOCS")]
#[deprecated(note = "not present in Python headers; to be removed")]
pub const PyTypeObject_INIT: PyTypeObject = type_object_init! {
tp_allocs: 0,
tp_frees: 0,
tp_maxalloc: 0,
tp_prev: ptr::null_mut(),
tp_next: ptr::null_mut(),
};

#[cfg(not(py_sys_config = "COUNT_ALLOCS"))]
#[deprecated(note = "not present in Python headers; to be removed")]
pub const PyTypeObject_INIT: PyTypeObject = type_object_init!();
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TBH I think this falls under the same bracket of the other _INIT constants which aren't actually defined upstream; we can just throw it away for the 0.14 release. Nobody should be using it.

Looks like that would allow quite a lot of macro code above to be deleted too!

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I thought so, but didn't want to presume. Updated.

Shall we also remove PyObject_Check, PySuper_Check, and FreeFunc? They're not in the Python API either, and I struggle to imagine why, for example, a downstream user would need need a function to verify that a PyObject is a Python object (always returns 1).

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Agreed that we can remove those three too!

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@kngwyu kngwyu left a comment

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Awesome 💯 , thank you.

@kngwyu kngwyu merged commit 2aeb021 into PyO3:master Feb 20, 2021
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3 participants