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bpo-42332: Add weakref slot to types.GenericAlias (GH-23250)

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Automerge-Triggered-By: GH:gvanrossum
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kj 2020-11-16 11:27:23 +08:00 • committed by GitHub
parent c272d40e5b
commit 384b7a4bd9
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3 changed files with 55 additions and 38 deletions
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6
Objects/genericaliasobject.c
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@ -10,6 +10,7 @@ typedef struct {
PyObject *origin;
PyObject *args;
PyObject *parameters;
PyObject* weakreflist;
} gaobject;
static void
@ -18,6 +19,9 @@ ga_dealloc(PyObject *self)
gaobject *alias = (gaobject *)self;
_PyObject_GC_UNTRACK(self);
if (alias->weakreflist != NULL) {
PyObject_ClearWeakRefs((PyObject *)alias);
}
Py_XDECREF(alias->origin);
Py_XDECREF(alias->args);
Py_XDECREF(alias->parameters);
@ -599,6 +603,7 @@ PyTypeObject Py_GenericAliasType = {
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
.tp_traverse = ga_traverse,
.tp_richcompare = ga_richcompare,
.tp_weaklistoffset = offsetof(gaobject, weakreflist),
.tp_methods = ga_methods,
.tp_members = ga_members,
.tp_alloc = PyType_GenericAlloc,
@ -630,6 +635,7 @@ Py_GenericAlias(PyObject *origin, PyObject *args)
alias->origin = origin;
alias->args = args;
alias->parameters = NULL;
alias->weakreflist = NULL;
_PyObject_GC_TRACK(alias);
return (PyObject *)alias;
}