# methodobject.rs - source
Source of the Rust file `/home/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/pyo3-0.13.2/src/ffi/methodobject.rs`.
Keywords: rust, rustlang, rust-lang

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    use crate::ffi::object::{PyObject, PyTypeObject, Py_TYPE};
    use std::mem;
    use std::os::raw::{c_char, c_int};

    #[cfg_attr(windows, link(name = "pythonXY"))]
    extern "C" {
        #[cfg_attr(PyPy, link_name = "PyPyCFunction_Type")]
        pub static mut PyCFunction_Type: PyTypeObject;
    }

    #[inline]
    pub unsafe fn PyCFunction_Check(op: *mut PyObject) -> c_int {
        (Py_TYPE(op) == &mut PyCFunction_Type) as c_int
    }

    pub type PyCFunction =
        unsafe extern "C" fn(slf: *mut PyObject, args: *mut PyObject) -> *mut PyObject;

    #[cfg(all(Py_3_7, not(Py_LIMITED_API)))]
    pub type _PyCFunctionFast = unsafe extern "C" fn(
        slf: *mut PyObject,
        args: *mut *mut PyObject,
        nargs: crate::ffi::pyport::Py_ssize_t,
        kwnames: *mut PyObject,
    ) -> *mut PyObject;

    pub type PyCFunctionWithKeywords = unsafe extern "C" fn(
        slf: *mut PyObject,
        args: *mut PyObject,
        kwds: *mut PyObject,
    ) -> *mut PyObject;

    #[cfg(Py_3_7)]
    pub type _PyCFunctionFastWithKeywords = unsafe extern "C" fn(
        slf: *mut PyObject,
        args: *const *mut PyObject,
        nargs: crate::ffi::pyport::Py_ssize_t,
        kwnames: *mut PyObject,
    ) -> *mut PyObject;

    extern "C" {
        #[cfg_attr(PyPy, link_name = "PyPyCFunction_GetFunction")]
        pub fn PyCFunction_GetFunction(f: *mut PyObject) -> Option<PyCFunction>;
        pub fn PyCFunction_GetSelf(f: *mut PyObject) -> *mut PyObject;
        pub fn PyCFunction_GetFlags(f: *mut PyObject) -> c_int;
        pub fn PyCFunction_Call(
            f: *mut PyObject,
            args: *mut PyObject,
            kwds: *mut PyObject,
        ) -> *mut PyObject;
    }

    #[repr(C)]
    #[derive(Copy, Clone)]
    pub struct PyMethodDef {
        pub ml_name: *const c_char,
        pub ml_meth: Option<PyCFunction>,
        pub ml_flags: c_int,
        pub ml_doc: *const c_char,
    }

    pub const PyMethodDef_INIT: PyMethodDef = PyMethodDef {
        ml_name: std::ptr::null(),
        ml_meth: None,
        ml_flags: 0,
        ml_doc: std::ptr::null(),
    };

    impl Default for PyMethodDef {
        fn default() -> PyMethodDef {
            unsafe { mem::zeroed() }
        }
    }

    extern "C" {
        #[cfg_attr(PyPy, link_name = "PyPyCFunction_NewEx")]
        pub fn PyCFunction_NewEx(
            ml: *mut PyMethodDef,
            slf: *mut PyObject,
            module: *mut PyObject,
        ) -> *mut PyObject;

        #[cfg_attr(PyPy, link_name = "PyPyCFunction_New")]
        pub fn PyCFunction_New(ml: *mut PyMethodDef, slf: *mut PyObject) -> *mut PyObject;
    }

    /* Flag passed to newmethodobject */
    pub const METH_VARARGS: c_int = 0x0001;
    pub const METH_KEYWORDS: c_int = 0x0002;
    /* METH_NOARGS and METH_O must not be combined with the flags above. */
    pub const METH_NOARGS: c_int = 0x0004;
    pub const METH_O: c_int = 0x0008;

    /* METH_CLASS and METH_STATIC are a little different; these control
    the construction of methods for a class.  These cannot be used for
    functions in modules. */
    pub const METH_CLASS: c_int = 0x0010;
    pub const METH_STATIC: c_int = 0x0020;

    /* METH_COEXIST allows a method to be entered eventhough a slot has
    already filled the entry.  When defined, the flag allows a separate
    method, "__contains__" for example, to coexist with a defined
    slot like sq_contains. */

    pub const METH_COEXIST: c_int = 0x0040;

    /* METH_FASTCALL indicates the PEP 590 Vectorcall calling format. It may
    be specified alone or with METH_KEYWORDS. */
    #[cfg(all(Py_3_7, not(Py_LIMITED_API)))]
    pub const METH_FASTCALL: c_int = 0x0080;

    extern "C" {
        pub fn PyCFunction_ClearFreeList() -> c_int;
    }