python27_sys/
weakrefobject.rs

1use libc::{c_int, c_long};
2
3use crate::object::*;
4use crate::pyport::Py_ssize_t;
5
6#[repr(C)]
7#[derive(Copy, Clone)]
8pub struct PyWeakReference {
9    #[cfg(py_sys_config = "Py_TRACE_REFS")]
10    pub _ob_next: *mut PyObject,
11    #[cfg(py_sys_config = "Py_TRACE_REFS")]
12    pub _ob_prev: *mut PyObject,
13    pub ob_refcnt: Py_ssize_t,
14    pub ob_type: *mut PyTypeObject,
15    pub wr_object: *mut PyObject,
16    pub wr_callback: *mut PyObject,
17    pub hash: c_long,
18    pub wr_prev: *mut PyWeakReference,
19    pub wr_next: *mut PyWeakReference,
20}
21
22#[cfg_attr(windows, link(name = "pythonXY"))]
23extern "C" {
24    static mut _PyWeakref_RefType: PyTypeObject;
25    static mut _PyWeakref_ProxyType: PyTypeObject;
26    static mut _PyWeakref_CallableProxyType: PyTypeObject;
27}
28
29#[inline(always)]
30pub unsafe fn PyWeakref_CheckRef(op: *mut PyObject) -> c_int {
31    PyObject_TypeCheck(op, &mut _PyWeakref_RefType)
32}
33
34#[inline(always)]
35pub unsafe fn PyWeakref_CheckRefExact(op: *mut PyObject) -> c_int {
36    (Py_TYPE(op) == &mut _PyWeakref_RefType) as c_int
37}
38
39#[inline(always)]
40pub unsafe fn PyWeakref_CheckProxy(op: *mut PyObject) -> c_int {
41    ((Py_TYPE(op) == &mut _PyWeakref_ProxyType)
42        || (Py_TYPE(op) == &mut _PyWeakref_CallableProxyType)) as c_int
43}
44
45#[inline(always)]
46pub unsafe fn PyWeakref_Check(op: *mut PyObject) -> c_int {
47    (PyWeakref_CheckRef(op) != 0 || PyWeakref_CheckProxy(op) != 0) as c_int
48}
49
50#[cfg_attr(windows, link(name = "pythonXY"))]
51extern "C" {
52    pub fn PyWeakref_NewRef(ob: *mut PyObject, callback: *mut PyObject) -> *mut PyObject;
53    pub fn PyWeakref_NewProxy(ob: *mut PyObject, callback: *mut PyObject) -> *mut PyObject;
54    pub fn PyWeakref_GetObject(_ref: *mut PyObject) -> *mut PyObject;
55
56    pub fn _PyWeakref_GetWeakrefCount(head: *mut PyWeakReference) -> Py_ssize_t;
57    pub fn _PyWeakref_ClearRef(slf: *mut PyWeakReference);
58}
59
60#[inline(always)]
61pub unsafe fn PyWeakref_GET_OBJECT(_ref: *mut PyObject) -> *mut PyObject {
62    let obj = (*(_ref as *mut PyWeakReference)).wr_object;
63    if Py_REFCNT(obj) > 0 {
64        obj
65    } else {
66        Py_None()
67    }
68}
python27_sys/weakrefobject.rs

python27_sys/
weakrefobject.rs
