/* This function is called by the tp_dealloc handler to clear weak references. * * This iterates through the weak references for 'object' and calls callbacks * for those references which have one. It returns when all callbacks have * been attempted. */ void PyObject_ClearWeakRefs(PyObject *object) { PyWeakReference **list; if (object == NULL || !PyType_SUPPORTS_WEAKREFS(object->ob_type) || object->ob_refcnt != 0) { PyErr_BadInternalCall(); return; } list = GET_WEAKREFS_LISTPTR(object); /* Remove the callback-less basic and proxy references */ if (*list != NULL && (*list)->wr_callback == NULL) { clear_weakref(*list); if (*list != NULL && (*list)->wr_callback == NULL) clear_weakref(*list); } if (*list != NULL) { PyWeakReference *current = *list; int count = _PyWeakref_GetWeakrefCount(current); int restore_error = PyErr_Occurred() ? 1 : 0; PyObject *err_type, *err_value, *err_tb; if (restore_error) PyErr_Fetch(&err_type, &err_value, &err_tb); if (count == 1) { PyObject *callback = current->wr_callback; current->wr_callback = NULL; clear_weakref(current); handle_callback(current, callback); Py_DECREF(callback); } else { PyObject *tuple = PyTuple_New(count * 2); int i = 0; for (i = 0; i < count; ++i) { PyWeakReference *next = current->wr_next; Py_INCREF(current); PyTuple_SET_ITEM(tuple, i * 2, (PyObject *) current); PyTuple_SET_ITEM(tuple, i * 2 + 1, current->wr_callback); current->wr_callback = NULL; clear_weakref(current); current = next; } for (i = 0; i < count; ++i) { PyObject *current = PyTuple_GET_ITEM(tuple, i * 2); PyObject *callback = PyTuple_GET_ITEM(tuple, i * 2 + 1); handle_callback((PyWeakReference *)current, callback); } Py_DECREF(tuple); } if (restore_error) PyErr_Restore(err_type, err_value, err_tb); } }
static void weakref_dealloc(PyObject *self) { PyObject_GC_UnTrack(self); clear_weakref((PyWeakReference *) self); self->ob_type->tp_free(self); }
static void weakref_dealloc(PyObject *self) { PyObject_GC_UnTrack(self); clear_weakref((PyWeakReference *) self); Py_TYPE(self)->tp_free(self); }
static void weakref_dealloc(PyWeakReference *self) { PyObject_GC_UnTrack((PyObject *)self); clear_weakref(self); PyObject_GC_Del(self); }
static void proxy_dealloc(PyWeakReference *self) { if (self->wr_callback != NULL) PyObject_GC_UnTrack((PyObject *)self); clear_weakref(self); PyObject_GC_Del(self); }
static void proxy_dealloc(PyWeakReference *self) { if (self->wr_callback != NULL) PyObject_GC_UnTrack((PyObject *)self); clear_weakref(self); // Pyston change: we monkey-patch this function to use the Pyston GC // Shouldn't need to call tp_free either. // PyObject_GC_Del(self); }
/* Cyclic gc uses this to *just* clear the passed-in reference, leaving * the callback intact and uncalled. It must be possible to call self's * tp_dealloc() after calling this, so self has to be left in a sane enough * state for that to work. We expect tp_dealloc to decref the callback * then. The reason for not letting clear_weakref() decref the callback * right now is that if the callback goes away, that may in turn trigger * another callback (if a weak reference to the callback exists) -- running * arbitrary Python code in the middle of gc is a disaster. The convolution * here allows gc to delay triggering such callbacks until the world is in * a sane state again. */ void _PyWeakref_ClearRef(PyWeakReference *self) { PyObject *callback; assert(self != NULL); assert(PyWeakref_Check(self)); /* Preserve and restore the callback around clear_weakref. */ callback = self->wr_callback; self->wr_callback = NULL; clear_weakref(self); self->wr_callback = callback; }
static int gc_clear(PyWeakReference *self) { clear_weakref(self); return 0; }
/* This function is called by the tp_dealloc handler to clear weak references. * * This iterates through the weak references for 'object' and calls callbacks * for those references which have one. It returns when all callbacks have * been attempted. */ void PyObject_ClearWeakRefs(PyObject *object) { PyWeakReference **list; if (object == NULL || !PyType_SUPPORTS_WEAKREFS(Py_TYPE(object)) //|| object->ob_refcnt != 0 ) { PyErr_BadInternalCall(); return; } list = GET_WEAKREFS_LISTPTR(object); /* Remove the callback-less basic and proxy references */ if (*list != NULL && (*list)->wr_callback == NULL) { clear_weakref(*list); if (*list != NULL && (*list)->wr_callback == NULL) clear_weakref(*list); } if (*list != NULL) { PyWeakReference *current = *list; Py_ssize_t count = _PyWeakref_GetWeakrefCount(current); int restore_error = PyErr_Occurred() ? 1 : 0; PyObject *err_type, *err_value, *err_tb; if (restore_error) PyErr_Fetch(&err_type, &err_value, &err_tb); if (count == 1) { PyObject *callback = current->wr_callback; current->wr_callback = NULL; clear_weakref(current); if (callback != NULL) { // Pyston change: // current is a stack reference to a GC allocated object. If it wasn't null when we fetched it from *list, it won't // be collected, and we can trust that it's still valid here. if (true /*current->ob_refcnt > 0*/) handle_callback(current, callback); Py_DECREF(callback); } } else { PyObject *tuple; Py_ssize_t i = 0; tuple = PyTuple_New(count * 2); if (tuple == NULL) { if (restore_error) PyErr_Fetch(&err_type, &err_value, &err_tb); return; } for (i = 0; i < count; ++i) { PyWeakReference *next = current->wr_next; // Pyston change: // current is a stack reference to a GC allocated object. If it wasn't null when we fetched it from *list, it won't // be collected, and we can trust that it's still valid here. if (true /*current->ob_refcnt > 0*/) { Py_INCREF(current); PyTuple_SET_ITEM(tuple, i * 2, (PyObject *) current); PyTuple_SET_ITEM(tuple, i * 2 + 1, current->wr_callback); } else { Py_DECREF(current->wr_callback); } current->wr_callback = NULL; clear_weakref(current); current = next; } for (i = 0; i < count; ++i) { PyObject *callback = PyTuple_GET_ITEM(tuple, i * 2 + 1); /* The tuple may have slots left to NULL */ if (callback != NULL) { PyObject *item = PyTuple_GET_ITEM(tuple, i * 2); handle_callback((PyWeakReference *)item, callback); } } Py_DECREF(tuple); } if (restore_error) PyErr_Restore(err_type, err_value, err_tb); } }
/* This function is called by the tp_dealloc handler to clear weak references. * * This iterates through the weak references for 'object' and calls callbacks * for those references which have one. It returns when all callbacks have * been attempted. */ void PyObject_ClearWeakRefs(PyObject *object) { PyWeakReference **list; if (object == NULL || !PyType_SUPPORTS_WEAKREFS(Py_TYPE(object)) || object->ob_refcnt != 0) { PyErr_BadInternalCall(); return; } list = GET_WEAKREFS_LISTPTR(object); /* Remove the callback-less basic and proxy references */ if (*list != NULL && (*list)->wr_callback == NULL) { clear_weakref(*list); if (*list != NULL && (*list)->wr_callback == NULL) clear_weakref(*list); } if (*list != NULL) { PyWeakReference *current = *list; Py_ssize_t count = _PyWeakref_GetWeakrefCount(current); PyObject *err_type, *err_value, *err_tb; PyErr_Fetch(&err_type, &err_value, &err_tb); if (count == 1) { PyObject *callback = current->wr_callback; current->wr_callback = NULL; clear_weakref(current); if (callback != NULL) { if (current->ob_refcnt > 0) handle_callback(current, callback); Py_DECREF(callback); } } else { PyObject *tuple; Py_ssize_t i = 0; tuple = PyTuple_New(count * 2); if (tuple == NULL) { _PyErr_ReplaceException(err_type, err_value, err_tb); return; } for (i = 0; i < count; ++i) { PyWeakReference *next = current->wr_next; if (current->ob_refcnt > 0) { Py_INCREF(current); PyTuple_SET_ITEM(tuple, i * 2, (PyObject *) current); PyTuple_SET_ITEM(tuple, i * 2 + 1, current->wr_callback); } else { Py_DECREF(current->wr_callback); } current->wr_callback = NULL; clear_weakref(current); current = next; } for (i = 0; i < count; ++i) { PyObject *callback = PyTuple_GET_ITEM(tuple, i * 2 + 1); /* The tuple may have slots left to NULL */ if (callback != NULL) { PyObject *item = PyTuple_GET_ITEM(tuple, i * 2); handle_callback((PyWeakReference *)item, callback); } } Py_DECREF(tuple); } assert(!PyErr_Occurred()); PyErr_Restore(err_type, err_value, err_tb); } }