Staging
v0.5.1
v0.5.1
swh:1:snp:635f4099902912592851108bcac178ff574f7c5f
Tip revision: 74f4bd53e03ded8408bcc2de67cf0f5a4ac5b1a1 authored by Barry Warsaw on 23 February 2012, 15:59:38 UTC
Bump some more copyright years (as per PEP 101), since this is the first
Bump some more copyright years (as per PEP 101), since this is the first
Tip revision: 74f4bd5
_weakref.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 = PyInt_FromSsize_t(_PyWeakref_GetWeakrefCount(*list));
}
else
result = PyInt_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}
};
PyMODINIT_FUNC
init_weakref(void)
{
PyObject *m;
m = Py_InitModule3("_weakref", weakref_functions,
"Weak-reference support module.");
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);
}
}