pyo3_ffi/
methodobject.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
use crate::object::{PyObject, PyTypeObject, Py_TYPE};
#[cfg(Py_3_9)]
use crate::PyObject_TypeCheck;
use std::os::raw::{c_char, c_int, c_void};
use std::{mem, ptr};

#[cfg(all(Py_3_9, not(Py_LIMITED_API), not(GraalPy)))]
pub struct PyCFunctionObject {
    pub ob_base: PyObject,
    pub m_ml: *mut PyMethodDef,
    pub m_self: *mut PyObject,
    pub m_module: *mut PyObject,
    pub m_weakreflist: *mut PyObject,
    #[cfg(not(PyPy))]
    pub vectorcall: Option<crate::vectorcallfunc>,
}

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

#[cfg(Py_3_9)]
#[inline]
pub unsafe fn PyCFunction_CheckExact(op: *mut PyObject) -> c_int {
    (Py_TYPE(op) == ptr::addr_of_mut!(PyCFunction_Type)) as c_int
}

#[cfg(Py_3_9)]
#[inline]
pub unsafe fn PyCFunction_Check(op: *mut PyObject) -> c_int {
    PyObject_TypeCheck(op, ptr::addr_of_mut!(PyCFunction_Type))
}

#[cfg(not(Py_3_9))]
#[inline]
pub unsafe fn PyCFunction_Check(op: *mut PyObject) -> c_int {
    (Py_TYPE(op) == ptr::addr_of_mut!(PyCFunction_Type)) as c_int
}

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

#[cfg(any(Py_3_10, not(Py_LIMITED_API)))]
pub type PyCFunctionFast = unsafe extern "C" fn(
    slf: *mut PyObject,
    args: *mut *mut PyObject,
    nargs: crate::pyport::Py_ssize_t,
) -> *mut PyObject;

#[cfg(any(Py_3_10, not(Py_LIMITED_API)))]
#[deprecated(note = "renamed to `PyCFunctionFast`")]
pub type _PyCFunctionFast = PyCFunctionFast;

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

#[cfg(any(Py_3_10, not(Py_LIMITED_API)))]
pub type PyCFunctionFastWithKeywords = unsafe extern "C" fn(
    slf: *mut PyObject,
    args: *const *mut PyObject,
    nargs: crate::pyport::Py_ssize_t,
    kwnames: *mut PyObject,
) -> *mut PyObject;

#[cfg(any(Py_3_10, not(Py_LIMITED_API)))]
#[deprecated(note = "renamed to `PyCFunctionFastWithKeywords`")]
pub type _PyCFunctionFastWithKeywords = PyCFunctionFastWithKeywords;

#[cfg(all(Py_3_9, not(Py_LIMITED_API)))]
pub type PyCMethod = unsafe extern "C" fn(
    slf: *mut PyObject,
    defining_class: *mut PyTypeObject,
    args: *const *mut PyObject,
    nargs: crate::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;
    #[cfg(not(Py_3_13))]
    #[cfg_attr(Py_3_9, deprecated(note = "Python 3.9"))]
    pub fn PyCFunction_Call(
        f: *mut PyObject,
        args: *mut PyObject,
        kwds: *mut PyObject,
    ) -> *mut PyObject;
}

/// Represents the [PyMethodDef](https://docs.python.org/3/c-api/structures.html#c.PyMethodDef)
/// structure.
///
/// Note that CPython may leave fields uninitialized. You must ensure that
/// `ml_name` != NULL before dereferencing or reading other fields.
#[repr(C)]
#[derive(Copy, Clone, PartialEq, Eq)]
pub struct PyMethodDef {
    pub ml_name: *const c_char,
    pub ml_meth: PyMethodDefPointer,
    pub ml_flags: c_int,
    pub ml_doc: *const c_char,
}

impl PyMethodDef {
    pub const fn zeroed() -> PyMethodDef {
        PyMethodDef {
            ml_name: ptr::null(),
            ml_meth: PyMethodDefPointer {
                Void: ptr::null_mut(),
            },
            ml_flags: 0,
            ml_doc: ptr::null(),
        }
    }
}

impl Default for PyMethodDef {
    fn default() -> PyMethodDef {
        PyMethodDef {
            ml_name: ptr::null(),
            ml_meth: PyMethodDefPointer {
                Void: ptr::null_mut(),
            },
            ml_flags: 0,
            ml_doc: ptr::null(),
        }
    }
}

/// Function types used to implement Python callables.
///
/// This function pointer must be accompanied by the correct [ml_flags](PyMethodDef::ml_flags),
/// otherwise the behavior is undefined.
///
/// See the [Python C API documentation][1] for more information.
///
/// [1]: https://docs.python.org/3/c-api/structures.html#implementing-functions-and-methods
#[repr(C)]
#[derive(Copy, Clone, Eq)]
pub union PyMethodDefPointer {
    /// This variant corresponds with [`METH_VARARGS`] *or* [`METH_NOARGS`] *or* [`METH_O`].
    pub PyCFunction: PyCFunction,

    /// This variant corresponds with [`METH_VARARGS`] | [`METH_KEYWORDS`].
    pub PyCFunctionWithKeywords: PyCFunctionWithKeywords,

    /// This variant corresponds with [`METH_FASTCALL`].
    #[cfg(any(Py_3_10, not(Py_LIMITED_API)))]
    #[deprecated(note = "renamed to `PyCFunctionFast`")]
    pub _PyCFunctionFast: PyCFunctionFast,

    /// This variant corresponds with [`METH_FASTCALL`].
    #[cfg(any(Py_3_10, not(Py_LIMITED_API)))]
    pub PyCFunctionFast: PyCFunctionFast,

    /// This variant corresponds with [`METH_FASTCALL`] | [`METH_KEYWORDS`].
    #[cfg(any(Py_3_10, not(Py_LIMITED_API)))]
    #[deprecated(note = "renamed to `PyCFunctionFastWithKeywords`")]
    pub _PyCFunctionFastWithKeywords: PyCFunctionFastWithKeywords,

    /// This variant corresponds with [`METH_FASTCALL`] | [`METH_KEYWORDS`].
    #[cfg(any(Py_3_10, not(Py_LIMITED_API)))]
    pub PyCFunctionFastWithKeywords: PyCFunctionFastWithKeywords,

    /// This variant corresponds with [`METH_METHOD`] | [`METH_FASTCALL`] | [`METH_KEYWORDS`].
    #[cfg(all(Py_3_9, not(Py_LIMITED_API)))]
    pub PyCMethod: PyCMethod,

    Void: *mut c_void,
}

impl PyMethodDefPointer {
    pub fn as_ptr(&self) -> *mut c_void {
        unsafe { self.Void }
    }

    pub fn is_null(&self) -> bool {
        self.as_ptr().is_null()
    }

    pub const fn zeroed() -> PyMethodDefPointer {
        PyMethodDefPointer {
            Void: ptr::null_mut(),
        }
    }
}

impl PartialEq for PyMethodDefPointer {
    fn eq(&self, other: &Self) -> bool {
        unsafe { self.Void == other.Void }
    }
}

impl std::fmt::Pointer for PyMethodDefPointer {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        let ptr = unsafe { self.Void };
        std::fmt::Pointer::fmt(&ptr, f)
    }
}

const _: () =
    assert!(mem::size_of::<PyMethodDefPointer>() == mem::size_of::<Option<extern "C" fn()>>());

#[cfg(not(Py_3_9))]
extern "C" {
    #[cfg_attr(PyPy, link_name = "PyPyCFunction_New")]
    pub fn PyCFunction_New(ml: *mut PyMethodDef, slf: *mut PyObject) -> *mut PyObject;

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

#[cfg(Py_3_9)]
#[inline]
pub unsafe fn PyCFunction_New(ml: *mut PyMethodDef, slf: *mut PyObject) -> *mut PyObject {
    PyCFunction_NewEx(ml, slf, std::ptr::null_mut())
}

#[cfg(Py_3_9)]
#[inline]
pub unsafe fn PyCFunction_NewEx(
    ml: *mut PyMethodDef,
    slf: *mut PyObject,
    module: *mut PyObject,
) -> *mut PyObject {
    PyCMethod_New(ml, slf, module, std::ptr::null_mut())
}

#[cfg(Py_3_9)]
extern "C" {
    #[cfg_attr(PyPy, link_name = "PyPyCMethod_New")]
    pub fn PyCMethod_New(
        ml: *mut PyMethodDef,
        slf: *mut PyObject,
        module: *mut PyObject,
        cls: *mut PyTypeObject,
    ) -> *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(any(Py_3_10, not(Py_LIMITED_API)))]
pub const METH_FASTCALL: c_int = 0x0080;

// skipped METH_STACKLESS

#[cfg(all(Py_3_9, not(Py_LIMITED_API)))]
pub const METH_METHOD: c_int = 0x0200;

extern "C" {
    #[cfg(not(Py_3_9))]
    pub fn PyCFunction_ClearFreeList() -> c_int;
}