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Add get_referrents() helper function.

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Jeremy Hylton 2003-04-03 16:28:38 +00:00
parent 7fb697b5d2
commit 5bd378bfca
1 changed files with 32 additions and 1 deletions
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33
Modules/gcmodule.c
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@ -828,6 +828,34 @@ gc_get_referrers(PyObject *self, PyObject *args)
return result;
}
static int
referrentsvisit(PyObject *obj, PyObject *list)
{
if (PyList_Append(list, obj) < 0)
return 1;
return 0;
}
PyDoc_STRVAR(gc_get_referrents__doc__,
"get_referrents(*objs) -> list\n\
Return the list of objects that directly refer to any of objs.");
static PyObject *
gc_get_referrents(PyObject *self, PyObject *args)
{
int i;
PyObject *result = PyList_New(0);
for (i = 0; i < PyTuple_GET_SIZE(args); i++) {
PyObject *obj = PyTuple_GET_ITEM(args, i);
traverseproc traverse = obj->ob_type->tp_traverse;
if (!traverse)
continue;
if (traverse(obj, (visitproc)referrentsvisit, result))
return NULL;
}
return result;
}
PyDoc_STRVAR(gc_get_objects__doc__,
"get_objects() -> [...]\n"
"\n"
@ -884,7 +912,8 @@ PyDoc_STRVAR(gc__doc__,
"set_threshold() -- Set the collection thresholds.\n"
"get_threshold() -- Return the current the collection thresholds.\n"
"get_objects() -- Return a list of all objects tracked by the collector.\n"
"get_referrers() -- Return the list of objects that refer to an object.\n");
"get_referrers() -- Return the list of objects that refer to an object.\n"
"get_referrents() -- Return the list of objects that an object refers to.\n");
static PyMethodDef GcMethods[] = {
{"enable", gc_enable, METH_VARARGS, gc_enable__doc__},
@ -898,6 +927,8 @@ static PyMethodDef GcMethods[] = {
{"get_objects", gc_get_objects,METH_VARARGS, gc_get_objects__doc__},
{"get_referrers", gc_get_referrers, METH_VARARGS,
gc_get_referrers__doc__},
{"get_referrents", gc_get_referrents, METH_VARARGS,
gc_get_referrents__doc__},
{NULL, NULL} /* Sentinel */
};