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bpo-47164: Add _PyCFunctionObject_CAST() macro by vstinner · Pull Request #32190 · python/cpython · GitHub

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  2. cpython

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bpo-47164: Add _PyCFunctionObject_CAST() macro #32190

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Merged
vstinner merged 1 commit into from
Mar 31, 2022
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bpo-47164: Add _PyCFunctionObject_CAST() macro #32190

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17 changes: 11 additions & 6 deletions Include/cpython/methodobject.h
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Original file line number Diff line number Diff line change
Expand Up @@ -7,18 +7,23 @@ PyAPI_DATA(PyTypeObject) PyCMethod_Type;
#define PyCMethod_CheckExact(op) Py_IS_TYPE(op, &PyCMethod_Type)
#define PyCMethod_Check(op) PyObject_TypeCheck(op, &PyCMethod_Type)

#define _PyCFunctionObject_CAST(func) \
(assert(PyCFunction_Check(func)), (PyCFunctionObject *)(func))
#define _PyCMethodObject_CAST(func) \
(assert(PyCMethod_Check(func)), (PyCMethodObject *)(func))

/* Macros for direct access to these values. Type checks are *not*
done, so use with care. */
#define PyCFunction_GET_FUNCTION(func) \
(((PyCFunctionObject *)func) -> m_ml -> ml_meth)
(_PyCFunctionObject_CAST(func)->m_ml->ml_meth)
#define PyCFunction_GET_SELF(func) \
(((PyCFunctionObject *)func) -> m_ml -> ml_flags & METH_STATIC ? \
NULL : ((PyCFunctionObject *)func) -> m_self)
(_PyCFunctionObject_CAST(func)->m_ml->ml_flags & METH_STATIC ? \
NULL : _PyCFunctionObject_CAST(func)->m_self)
#define PyCFunction_GET_FLAGS(func) \
(((PyCFunctionObject *)func) -> m_ml -> ml_flags)
(_PyCFunctionObject_CAST(func)->m_ml->ml_flags)
#define PyCFunction_GET_CLASS(func) \
(((PyCFunctionObject *)func) -> m_ml -> ml_flags & METH_METHOD ? \
((PyCMethodObject *)func) -> mm_class : NULL)
(_PyCFunctionObject_CAST(func)->m_ml->ml_flags & METH_METHOD ? \
_PyCMethodObject_CAST(func)->mm_class : NULL)

typedef struct {
PyObject_HEAD
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