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gh-99845: PEP 670: Convert PyObject macros to functions #99850

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Nov 30, 2022
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gh-99845: PEP 670: Convert PyObject macros to functions #99850

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13 changes: 8 additions & 5 deletions Include/cpython/objimpl.h
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,9 @@
# error "this header file must not be included directly"
#endif

#define _PyObject_SIZE(typeobj) ( (typeobj)->tp_basicsize )
static inline size_t _PyObject_SIZE(PyTypeObject *type) {
return _Py_STATIC_CAST(size_t, type->tp_basicsize);
}

/* _PyObject_VAR_SIZE returns the number of bytes (as size_t) allocated for a
vrbl-size object with nitems items, exclusive of gc overhead (if any). The
Expand All @@ -18,10 +20,11 @@
# error "_PyObject_VAR_SIZE requires SIZEOF_VOID_P be a power of 2"
#endif

#define _PyObject_VAR_SIZE(typeobj, nitems) \
_Py_SIZE_ROUND_UP((typeobj)->tp_basicsize + \
(nitems)*(typeobj)->tp_itemsize, \
SIZEOF_VOID_P)
static inline size_t _PyObject_VAR_SIZE(PyTypeObject *type, Py_ssize_t nitems) {
size_t size = _Py_STATIC_CAST(size_t, type->tp_basicsize);
size += _Py_STATIC_CAST(size_t, nitems) * _Py_STATIC_CAST(size_t, type->tp_itemsize);
return _Py_SIZE_ROUND_UP(size, SIZEOF_VOID_P);
}


/* This example code implements an object constructor with a custom
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