8000 bpo-42972: Fully implement GC protocol for sqlite3 heap types by erlend-aasland · Pull Request #26104 · python/cpython · GitHub
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bpo-42972: Fully implement GC protocol for sqlite3 heap types #26104

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Merged
merged 14 commits into from
May 25, 2021
Merged

bpo-42972: Fully implement GC protocol for sqlite3 heap types #26104

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6ece632
sqlite.Connection type now implements GC protocol
Jan 20, 2021
8660609
sqlite.Cursor type now implements GC protocol
Jan 20, 2021
13bc519
sqlite.Row type now implements GC protocol
Jan 20, 2021
4519017
sqlite.PrepareProtocol type now implements GC protocol
Jan 20, 2021
20da088
sqlite.Statement type now implements GC protocol
Jan 20, 2021
ca870ac
sqlite3.Cache and sqlite3.Node types now implements GC protocol
Jan 20, 2021
f5d9873
Remove unneeded self->db = NULL
May 13, 2021
34928ed
Get rid of unneeded cast in cursor_dealloc
May 13, 2021
590ff8e
Address review: visit node->key, node->data, and con->isolation_level
May 23, 2021
b080ff7
Harden cache clear
May 24, 2021
2bcfa29
Normalize connection_dealloc naming
May 24, 2021
f8eb733
Address review: visit row PyObjects for consistency
May 25, 2021
ab4c6e6
Normalize statement dealloc naming
May 25, 2021
926787d
Clear sqlite3 stmt resources in stmt_clear()
May 25, 2021
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sqlite.Cursor type now implements GC protocol
  • Loading branch information
Erlend E. Aasland committed May 13, 2021
commit 866060958c17a4ab6f677362ac357433dc6fca91
44 changes: 32 additions & 12 deletions Modules/_sqlite/cursor.c 8000
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Original file line number Diff line number Diff line change
Expand Up @@ -81,27 +81,46 @@ pysqlite_cursor_init_impl(pysqlite_Cursor *self,
return 0;
}

static void pysqlite_cursor_dealloc(pysqlite_Cursor* self)
static int
cursor_traverse(pysqlite_Cursor *self, visitproc visit, void *arg)
{
PyTypeObject *tp = Py_TYPE(self);
Py_VISIT(self->connection);
Py_VISIT(self->row_cast_map);
Py_VISIT(self->row_factory);
Py_VISIT(self->next_row);
Py_VISIT(Py_TYPE(self));
return 0;
}

static int
cursor_clear(pysqlite_Cursor *self)
{
/* Reset the statement if the user has not closed the cursor */
if (self->statement) {
pysqlite_statement_reset(self->statement);
Py_DECREF(self->statement);
Py_CLEAR(self->statement);
}

Py_XDECREF(self->connection);
Py_XDECREF(self->row_cast_map);
Py_XDECREF(self->description);
Py_XDECREF(self->lastrowid);
Py_XDECREF(self->row_factory);
Py_XDECREF(self->next_row);
Py_CLEAR(self->connection);
Py_CLEAR(self->row_cast_map);
Py_CLEAR(self->description);
Py_CLEAR(self->lastrowid);
Py_CLEAR(self->row_factory);
Py_CLEAR(self->next_row);

if (self->in_weakreflist != NULL) {
PyObject_ClearWeakRefs((PyObject*)self);
}

return 0;
}

static void
cursor_dealloc(pysqlite_Cursor *self)
{
PyTypeObject *tp = Py_TYPE(self);
PyObject_GC_UnTrack(self);
tp->tp_clear((PyObject *)self);
tp->tp_free(self);
Py_DECREF(tp);
}
Expand Down Expand Up @@ -1006,21 +1025,22 @@ static const char cursor_doc[] =
PyDoc_STR("SQLite database cursor class.");

static PyType_Slot cursor_slots[] = {
{Py_tp_dealloc, pysqlite_cursor_dealloc},
{Py_tp_dealloc, cursor_dealloc},
{Py_tp_doc, (void *)cursor_doc},
{Py_tp_iter, PyObject_SelfIter},
{Py_tp_iternext, pysqlite_cursor_iternext},
{Py_tp_methods, cursor_methods},
{Py_tp_members, cursor_members},
{Py_tp_new, PyType_GenericNew},
{Py_tp_init, pysqlite_cursor_init},
{Py_tp_traverse, cursor_traverse},
{Py_tp_clear, cursor_clear},
{0, NULL},
};

static PyType_Spec cursor_spec = {
.name = MODULE_NAME ".Cursor",
.basicsize = sizeof(pysqlite_Cursor),
.flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
.flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC,
.slots = cursor_slots,
};

Expand Down
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