diff options
Diffstat (limited to 'Include')
| -rw-r--r-- | Include/object.h | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/Include/object.h b/Include/object.h index da8befa..0c88603 100644 --- a/Include/object.h +++ b/Include/object.h @@ -851,18 +851,28 @@ PyAPI_FUNC(void) _Py_Dealloc(PyObject *); * * As in case of Py_CLEAR "the obvious" code can be deadly: * - * Py_XDECREF(op); + * Py_DECREF(op); * op = op2; * * The safe way is: * - * Py_XSETREF(op, op2); + * Py_SETREF(op, op2); * * That arranges to set `op` to `op2` _before_ decref'ing, so that any code * triggered as a side-effect of `op` getting torn down no longer believes * `op` points to a valid object. + * + * Py_XSETREF is a variant of Py_SETREF that uses Py_XDECREF instead of + * Py_DECREF. */ +#define Py_SETREF(op, op2) \ + do { \ + PyObject *_py_tmp = (PyObject *)(op); \ + (op) = (op2); \ + Py_DECREF(_py_tmp); \ + } while (0) + #define Py_XSETREF(op, op2) \ do { \ PyObject *_py_tmp = (PyObject *)(op); \ |