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bpo-39573: Convert Py_REFCNT and Py_SIZE to functions (GH-20429)

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Convert Py_REFCNT() and Py_SIZE() macros to static inline functions.
They cannot be used as l-value anymore: use Py_SET_REFCNT() and
Py_SET_SIZE() to set an object reference count and size.

Replace &Py_SIZE(self) with &((PyVarObject*)self)->ob_size
in arraymodule.c.

This change is backward incompatible on purpose, to prepare the C API
for an opaque PyObject structure.
This commit is contained in:
Victor Stinner 2020-05-27 14:55:10 +02:00 • committed by GitHub
parent 20941de0dd
commit fe2978b3b9
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6 changed files with 44 additions and 14 deletions
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19
Doc/c-api/structures.rst
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@ -88,13 +88,13 @@ the definition of all other Python objects.
.. versionadded:: 3.9
.. c:macro:: Py_REFCNT(o)
.. c:function:: Py_ssize_t Py_REFCNT(const PyObject *o)
This macro is used to access the :attr:`ob_refcnt` member of a Python
object.
It expands to::
Get the reference count of the Python object *o*.
(((PyObject*)(o))->ob_refcnt)
.. versionchanged:: 3.10
:c:func:`Py_REFCNT()` is changed to the inline static function.
Use :c:func:`Py_SET_REFCNT()` to set an object reference count.
.. c:function:: void Py_SET_REFCNT(PyObject *o, Py_ssize_t refcnt)
@ -104,12 +104,13 @@ the definition of all other Python objects.
.. versionadded:: 3.9
.. c:macro:: Py_SIZE(o)
.. c:function:: Py_ssize_t Py_SIZE(const PyVarObject *o)
This macro is used to access the :attr:`ob_size` member of a Python object.
It expands to::
Get the size of the Python object *o*.
(((PyVarObject*)(o))->ob_size)
.. versionchanged:: 3.10
:c:func:`Py_SIZE()` is changed to the inline static function.
Use :c:func:`Py_SET_SIZE()` to set an object size.
.. c:function:: void Py_SET_SIZE(PyVarObject *o, Py_ssize_t size)