126 lines
3.3 KiB
C
126 lines
3.3 KiB
C
#include "Python.h"
|
|
|
|
|
|
#define GET_WEAKREFS_LISTPTR(o) \
|
|
((PyWeakReference **) PyObject_GET_WEAKREFS_LISTPTR(o))
|
|
|
|
|
|
PyDoc_STRVAR(weakref_getweakrefcount__doc__,
|
|
"getweakrefcount(object) -- return the number of weak references\n"
|
|
"to 'object'.");
|
|
|
|
static PyObject *
|
|
weakref_getweakrefcount(PyObject *self, PyObject *object)
|
|
{
|
|
PyObject *result = NULL;
|
|
|
|
if (PyType_SUPPORTS_WEAKREFS(Py_TYPE(object))) {
|
|
PyWeakReference **list = GET_WEAKREFS_LISTPTR(object);
|
|
|
|
result = PyLong_FromSsize_t(_PyWeakref_GetWeakrefCount(*list));
|
|
}
|
|
else
|
|
result = PyLong_FromLong(0);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
PyDoc_STRVAR(weakref_getweakrefs__doc__,
|
|
"getweakrefs(object) -- return a list of all weak reference objects\n"
|
|
"that point to 'object'.");
|
|
|
|
static PyObject *
|
|
weakref_getweakrefs(PyObject *self, PyObject *object)
|
|
{
|
|
PyObject *result = NULL;
|
|
|
|
if (PyType_SUPPORTS_WEAKREFS(Py_TYPE(object))) {
|
|
PyWeakReference **list = GET_WEAKREFS_LISTPTR(object);
|
|
Py_ssize_t count = _PyWeakref_GetWeakrefCount(*list);
|
|
|
|
result = PyList_New(count);
|
|
if (result != NULL) {
|
|
PyWeakReference *current = *list;
|
|
Py_ssize_t i;
|
|
for (i = 0; i < count; ++i) {
|
|
PyList_SET_ITEM(result, i, (PyObject *) current);
|
|
Py_INCREF(current);
|
|
current = current->wr_next;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
result = PyList_New(0);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
PyDoc_STRVAR(weakref_proxy__doc__,
|
|
"proxy(object[, callback]) -- create a proxy object that weakly\n"
|
|
"references 'object'. 'callback', if given, is called with a\n"
|
|
"reference to the proxy when 'object' is about to be finalized.");
|
|
|
|
static PyObject *
|
|
weakref_proxy(PyObject *self, PyObject *args)
|
|
{
|
|
PyObject *object;
|
|
PyObject *callback = NULL;
|
|
PyObject *result = NULL;
|
|
|
|
if (PyArg_UnpackTuple(args, "proxy", 1, 2, &object, &callback)) {
|
|
result = PyWeakref_NewProxy(object, callback);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
static PyMethodDef
|
|
weakref_functions[] = {
|
|
{"getweakrefcount", weakref_getweakrefcount, METH_O,
|
|
weakref_getweakrefcount__doc__},
|
|
{"getweakrefs", weakref_getweakrefs, METH_O,
|
|
weakref_getweakrefs__doc__},
|
|
{"proxy", weakref_proxy, METH_VARARGS,
|
|
weakref_proxy__doc__},
|
|
{NULL, NULL, 0, NULL}
|
|
};
|
|
|
|
|
|
static struct PyModuleDef weakrefmodule = {
|
|
PyModuleDef_HEAD_INIT,
|
|
"_weakref",
|
|
"Weak-reference support module.",
|
|
-1,
|
|
weakref_functions,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
PyMODINIT_FUNC
|
|
PyInit__weakref(void)
|
|
{
|
|
PyObject *m;
|
|
|
|
m = PyModule_Create(&weakrefmodule);
|
|
|
|
if (m != NULL) {
|
|
Py_INCREF(&_PyWeakref_RefType);
|
|
PyModule_AddObject(m, "ref",
|
|
(PyObject *) &_PyWeakref_RefType);
|
|
Py_INCREF(&_PyWeakref_RefType);
|
|
PyModule_AddObject(m, "ReferenceType",
|
|
(PyObject *) &_PyWeakref_RefType);
|
|
Py_INCREF(&_PyWeakref_ProxyType);
|
|
PyModule_AddObject(m, "ProxyType",
|
|
(PyObject *) &_PyWeakref_ProxyType);
|
|
Py_INCREF(&_PyWeakref_CallableProxyType);
|
|
PyModule_AddObject(m, "CallableProxyType",
|
|
(PyObject *) &_PyWeakref_CallableProxyType);
|
|
}
|
|
return m;
|
|
}
|