cython

1
from .object cimport PyObject
2

3
cdef extern from "Python.h":
4

5
    bint PyWeakref_Check(object ob)
6
    # Return true if ob is either a reference or proxy object.
7

8
    bint PyWeakref_CheckRef(object ob)
9
    # Return true if ob is a reference object.
10

11
    bint PyWeakref_CheckProxy(ob)
12
    # Return true if *ob* is a proxy object.
13

14
    object PyWeakref_NewRef(object ob, object callback)
15
    # Return a weak reference object for the object ob.  This will
16
    # always return a new reference, but is not guaranteed to create a
17
    # new object; an existing reference object may be returned.  The
18
    # second parameter, callback, can be a callable object that
19
    # receives notification when ob is garbage collected; it should
20
    # accept a single parameter, which will be the weak reference
21
    # object itself. callback may also be None or NULL.  If ob is not
22
    # a weakly-referencable object, or if callback is not callable,
23
    # None, or NULL, this will return NULL and raise TypeError.
24

25
    object PyWeakref_NewProxy(object ob, object callback)
26
    # Return a weak reference proxy object for the object ob.  This
27
    # will always return a new reference, but is not guaranteed to
28
    # create a new object; an existing proxy object may be returned.
29
    # The second parameter, callback, can be a callable object that
30
    # receives notification when ob is garbage collected; it should
31
    # accept a single parameter, which will be the weak reference
32
    # object itself. callback may also be None or NULL.  If ob is not
33
    # a weakly-referencable object, or if callback is not callable,
34
    # None, or NULL, this will return NULL and raise TypeError.
35

36
    PyObject* PyWeakref_GetObject(object ref) except NULL
37
    # Return the referenced object from a weak reference, ref.  If the
38
    # referent is no longer live, returns None.
39

40
    PyObject* PyWeakref_GET_OBJECT(object ref)
41
    # Similar to PyWeakref_GetObject, but implemented as a macro that
42
    # does no error checking.
43