mirror of
https://github.com/python/cpython
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27f9491c60
* Keep the function in the stable ABI. * Add unit tests on PyCFunction_Call() since it remains supported in the stable ABI.
131 lines
4.9 KiB
C
131 lines
4.9 KiB
C
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/* Method object interface */
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#ifndef Py_METHODOBJECT_H
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#define Py_METHODOBJECT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* This is about the type 'builtin_function_or_method',
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not Python methods in user-defined classes. See classobject.h
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for the latter. */
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PyAPI_DATA(PyTypeObject) PyCFunction_Type;
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#define PyCFunction_CheckExact(op) Py_IS_TYPE((op), &PyCFunction_Type)
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#define PyCFunction_Check(op) PyObject_TypeCheck((op), &PyCFunction_Type)
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typedef PyObject *(*PyCFunction)(PyObject *, PyObject *);
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typedef PyObject *(*_PyCFunctionFast) (PyObject *, PyObject *const *, Py_ssize_t);
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typedef PyObject *(*PyCFunctionWithKeywords)(PyObject *, PyObject *,
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PyObject *);
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typedef PyObject *(*_PyCFunctionFastWithKeywords) (PyObject *,
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PyObject *const *, Py_ssize_t,
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PyObject *);
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typedef PyObject *(*PyCMethod)(PyObject *, PyTypeObject *, PyObject *const *,
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size_t, PyObject *);
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// Cast an function to the PyCFunction type to use it with PyMethodDef.
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//
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// This macro can be used to prevent compiler warnings if the first parameter
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// uses a different pointer type than PyObject* (ex: METH_VARARGS and METH_O
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// calling conventions).
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//
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// The macro can also be used for METH_FASTCALL and METH_VARARGS|METH_KEYWORDS
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// calling conventions to avoid compiler warnings because the function has more
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// than 2 parameters. The macro first casts the function to the
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// "void func(void)" type to prevent compiler warnings.
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//
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// If a function is declared with the METH_NOARGS calling convention, it must
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// have 2 parameters. Since the second parameter is unused, Py_UNUSED() can be
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// used to prevent a compiler warning. If the function has a single parameter,
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// it triggers an undefined behavior when Python calls it with 2 parameters
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// (bpo-33012).
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#define _PyCFunction_CAST(func) \
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_Py_CAST(PyCFunction, _Py_CAST(void(*)(void), (func)))
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PyAPI_FUNC(PyCFunction) PyCFunction_GetFunction(PyObject *);
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PyAPI_FUNC(PyObject *) PyCFunction_GetSelf(PyObject *);
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PyAPI_FUNC(int) PyCFunction_GetFlags(PyObject *);
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struct PyMethodDef {
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const char *ml_name; /* The name of the built-in function/method */
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PyCFunction ml_meth; /* The C function that implements it */
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int ml_flags; /* Combination of METH_xxx flags, which mostly
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describe the args expected by the C func */
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const char *ml_doc; /* The __doc__ attribute, or NULL */
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};
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/* PyCFunction_New is declared as a function for stable ABI (declaration is
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* needed for e.g. GCC with -fvisibility=hidden), but redefined as a macro
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* that calls PyCFunction_NewEx. */
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PyAPI_FUNC(PyObject *) PyCFunction_New(PyMethodDef *, PyObject *);
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#define PyCFunction_New(ML, SELF) PyCFunction_NewEx((ML), (SELF), NULL)
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/* PyCFunction_NewEx is similar: on 3.9+, this calls PyCMethod_New. */
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PyAPI_FUNC(PyObject *) PyCFunction_NewEx(PyMethodDef *, PyObject *,
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PyObject *);
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#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03090000
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#define PyCFunction_NewEx(ML, SELF, MOD) PyCMethod_New((ML), (SELF), (MOD), NULL)
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PyAPI_FUNC(PyObject *) PyCMethod_New(PyMethodDef *, PyObject *,
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PyObject *, PyTypeObject *);
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#endif
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/* Flag passed to newmethodobject */
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/* #define METH_OLDARGS 0x0000 -- unsupported now */
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#define METH_VARARGS 0x0001
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#define METH_KEYWORDS 0x0002
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/* METH_NOARGS and METH_O must not be combined with the flags above. */
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#define METH_NOARGS 0x0004
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#define METH_O 0x0008
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/* METH_CLASS and METH_STATIC are a little different; these control
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the construction of methods for a class. These cannot be used for
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functions in modules. */
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#define METH_CLASS 0x0010
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#define METH_STATIC 0x0020
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/* METH_COEXIST allows a method to be entered even though a slot has
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already filled the entry. When defined, the flag allows a separate
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method, "__contains__" for example, to coexist with a defined
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slot like sq_contains. */
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#define METH_COEXIST 0x0040
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#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x030a0000
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# define METH_FASTCALL 0x0080
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#endif
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/* This bit is preserved for Stackless Python */
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#ifdef STACKLESS
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# define METH_STACKLESS 0x0100
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#else
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# define METH_STACKLESS 0x0000
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#endif
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/* METH_METHOD means the function stores an
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* additional reference to the class that defines it;
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* both self and class are passed to it.
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* It uses PyCMethodObject instead of PyCFunctionObject.
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* May not be combined with METH_NOARGS, METH_O, METH_CLASS or METH_STATIC.
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*/
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#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03090000
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#define METH_METHOD 0x0200
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#endif
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#ifndef Py_LIMITED_API
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# define Py_CPYTHON_METHODOBJECT_H
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# include "cpython/methodobject.h"
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# undef Py_CPYTHON_METHODOBJECT_H
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_METHODOBJECT_H */
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