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gh-117376: Partial implementation of deferred reference counting (#117696)

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This marks objects as using deferred refrence counting using the
`ob_gc_bits` field in the free-threaded build and collects those objects
during GC.
This commit is contained in:
Sam Gross 2024-04-12 13:36:20 -04:00 • committed by GitHub
parent c50cb6dd09
commit 4ad8f090cc
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GPG key ID: B5690EEEBB952194
9 changed files with 82 additions and 21 deletions
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37
Objects/moduleobject.c
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@ -88,21 +88,31 @@ new_module_notrack(PyTypeObject *mt)
m->md_weaklist = NULL;
m->md_name = NULL;
m->md_dict = PyDict_New();
if (m->md_dict != NULL) {
return m;
if (m->md_dict == NULL) {
Py_DECREF(m);
return NULL;
}
Py_DECREF(m);
return NULL;
return m;
}
static void
track_module(PyModuleObject *m)
{
_PyObject_SetDeferredRefcount(m->md_dict);
PyObject_GC_Track(m->md_dict);
_PyObject_SetDeferredRefcount((PyObject *)m);
PyObject_GC_Track(m);
}
static PyObject *
new_module(PyTypeObject *mt, PyObject *args, PyObject *kws)
{
PyObject *m = (PyObject *)new_module_notrack(mt);
PyModuleObject *m = new_module_notrack(mt);
if (m != NULL) {
PyObject_GC_Track(m);
track_module(m);
}
return m;
return (PyObject *)m;
}
PyObject *
@ -113,7 +123,7 @@ PyModule_NewObject(PyObject *name)
return NULL;
if (module_init_dict(m, m->md_dict, name, NULL) != 0)
goto fail;
PyObject_GC_Track(m);
track_module(m);
return (PyObject *)m;
fail:
@ -705,16 +715,7 @@ static int
module___init___impl(PyModuleObject *self, PyObject *name, PyObject *doc)
/*[clinic end generated code: output=e7e721c26ce7aad7 input=57f9e177401e5e1e]*/
{
PyObject *dict = self->md_dict;
if (dict == NULL) {
dict = PyDict_New();
if (dict == NULL)
return -1;
self->md_dict = dict;
}
if (module_init_dict(self, dict, name, doc) < 0)
return -1;
return 0;
return module_init_dict(self, self->md_dict, name, doc);
}
static void