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gh-105927: Refactor weakrefobject.c (#105928)

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* Rename proxy_checkref() to proxy_check_ref().
* proxy_check_ref() now checks the object, not the proxy.
* Most functions take PyObject* instead of PyWeakReference*.
* Remove redundant calls to PyWeakref_GET_OBJECT().
This commit is contained in:
Victor Stinner 2023-06-20 01:31:17 +02:00 • committed by GitHub
parent a5c2ad0c3d
commit 7f97c8e367
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 56 additions and 60 deletions
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112
Objects/weakrefobject.c
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@ -19,7 +19,7 @@ _PyWeakref_GetWeakrefCount(PyWeakReference *head)
return count; return count;
} }
static PyObject *weakref_vectorcall(PyWeakReference *self, PyObject *const *args, size_t nargsf, PyObject *kwnames); static PyObject *weakref_vectorcall(PyObject *self, PyObject *const *args, size_t nargsf, PyObject *kwnames);
static void static void
init_weakref(PyWeakReference *self, PyObject *ob, PyObject *callback) init_weakref(PyWeakReference *self, PyObject *ob, PyObject *callback)
@ -29,7 +29,7 @@ init_weakref(PyWeakReference *self, PyObject *ob, PyObject *callback)
self->wr_prev = NULL; self->wr_prev = NULL;
self->wr_next = NULL; self->wr_next = NULL;
self->wr_callback = Py_XNewRef(callback); self->wr_callback = Py_XNewRef(callback);
self->vectorcall = (vectorcallfunc)weakref_vectorcall; self->vectorcall = weakref_vectorcall;
} }
static PyWeakReference * static PyWeakReference *
@ -129,7 +129,7 @@ gc_clear(PyWeakReference *self)
static PyObject * static PyObject *
weakref_vectorcall(PyWeakReference *self, PyObject *const *args, weakref_vectorcall(PyObject *self, PyObject *const *args,
size_t nargsf, PyObject *kwnames) size_t nargsf, PyObject *kwnames)
{ {
if (!_PyArg_NoKwnames("weakref", kwnames)) { if (!_PyArg_NoKwnames("weakref", kwnames)) {
@ -160,7 +160,7 @@ weakref_hash(PyWeakReference *self)
static PyObject * static PyObject *
weakref_repr(PyWeakReference *self) weakref_repr(PyObject *self)
{ {
PyObject *name, *repr; PyObject *name, *repr;
PyObject* obj = PyWeakref_GET_OBJECT(self); PyObject* obj = PyWeakref_GET_OBJECT(self);
@ -174,17 +174,12 @@ weakref_repr(PyWeakReference *self)
if (name == NULL || !PyUnicode_Check(name)) { if (name == NULL || !PyUnicode_Check(name)) {
repr = PyUnicode_FromFormat( repr = PyUnicode_FromFormat(
"<weakref at %p; to '%s' at %p>", "<weakref at %p; to '%s' at %p>",
self, self, Py_TYPE(obj)->tp_name, obj);
Py_TYPE(PyWeakref_GET_OBJECT(self))->tp_name,
obj);
} }
else { else {
repr = PyUnicode_FromFormat( repr = PyUnicode_FromFormat(
"<weakref at %p; to '%s' at %p (%U)>", "<weakref at %p; to '%s' at %p (%U)>",
self, self, Py_TYPE(obj)->tp_name, obj, name);
Py_TYPE(PyWeakref_GET_OBJECT(self))->tp_name,
obj,
name);
} }
Py_DECREF(obj); Py_DECREF(obj);
Py_XDECREF(name); Py_XDECREF(name);
@ -203,8 +198,9 @@ weakref_richcompare(PyWeakReference* self, PyWeakReference* other, int op)
!PyWeakref_Check(other)) { !PyWeakref_Check(other)) {
Py_RETURN_NOTIMPLEMENTED; Py_RETURN_NOTIMPLEMENTED;
} }
if (PyWeakref_GET_OBJECT(self) == Py_None PyObject* obj = PyWeakref_GET_OBJECT(self);
|| PyWeakref_GET_OBJECT(other) == Py_None) { PyObject* other_obj = PyWeakref_GET_OBJECT(other);
if (obj == Py_None || other_obj == Py_None) {
int res = (self == other); int res = (self == other);
if (op == Py_NE) if (op == Py_NE)
res = !res; res = !res;
@ -213,8 +209,6 @@ weakref_richcompare(PyWeakReference* self, PyWeakReference* other, int op)
else else
Py_RETURN_FALSE; Py_RETURN_FALSE;
} }
PyObject* obj = PyWeakref_GET_OBJECT(self);
PyObject* other_obj = PyWeakref_GET_OBJECT(other);
Py_INCREF(obj); Py_INCREF(obj);
Py_INCREF(other_obj); Py_INCREF(other_obj);
PyObject* res = PyObject_RichCompare(obj, other_obj, op); PyObject* res = PyObject_RichCompare(obj, other_obj, op);
@ -372,7 +366,7 @@ _PyWeakref_RefType = {
.tp_dealloc = weakref_dealloc, .tp_dealloc = weakref_dealloc,
.tp_vectorcall_offset = offsetof(PyWeakReference, vectorcall), .tp_vectorcall_offset = offsetof(PyWeakReference, vectorcall),
.tp_call = PyVectorcall_Call, .tp_call = PyVectorcall_Call,
.tp_repr = (reprfunc)weakref_repr, .tp_repr = weakref_repr,
.tp_hash = (hashfunc)weakref_hash, .tp_hash = (hashfunc)weakref_hash,
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
Py_TPFLAGS_HAVE_VECTORCALL | Py_TPFLAGS_BASETYPE, Py_TPFLAGS_HAVE_VECTORCALL | Py_TPFLAGS_BASETYPE,
@ -388,15 +382,15 @@ _PyWeakref_RefType = {
}; };
static int static bool
proxy_checkref(PyWeakReference *proxy) proxy_check_ref(PyObject *obj)
{ {
if (PyWeakref_GET_OBJECT(proxy) == Py_None) { if (obj == Py_None) {
PyErr_SetString(PyExc_ReferenceError, PyErr_SetString(PyExc_ReferenceError,
"weakly-referenced object no longer exists"); "weakly-referenced object no longer exists");
return 0; return false;
} }
return 1; return true;
} }
@ -406,9 +400,9 @@ proxy_checkref(PyWeakReference *proxy)
*/ */
#define UNWRAP(o) \ #define UNWRAP(o) \
if (PyWeakref_CheckProxy(o)) { \ if (PyWeakref_CheckProxy(o)) { \
if (!proxy_checkref((PyWeakReference *)o)) \
return NULL; \
o = PyWeakref_GET_OBJECT(o); \ o = PyWeakref_GET_OBJECT(o); \
if (!proxy_check_ref(o)) \
return NULL; \
} }
#define WRAP_UNARY(method, generic) \ #define WRAP_UNARY(method, generic) \
@ -483,11 +477,12 @@ proxy_repr(PyWeakReference *proxy)
static int static int
proxy_setattr(PyWeakReference *proxy, PyObject *name, PyObject *value) proxy_setattr(PyObject *proxy, PyObject *name, PyObject *value)
{ {
if (!proxy_checkref(proxy))
return -1;
PyObject *obj = PyWeakref_GET_OBJECT(proxy); PyObject *obj = PyWeakref_GET_OBJECT(proxy);
if (!proxy_check_ref(obj)) {
return -1;
}
Py_INCREF(obj); Py_INCREF(obj);
int res = PyObject_SetAttr(obj, name, value); int res = PyObject_SetAttr(obj, name, value);
Py_DECREF(obj); Py_DECREF(obj);
@ -539,10 +534,10 @@ WRAP_BINARY(proxy_matmul, PyNumber_MatrixMultiply)
WRAP_BINARY(proxy_imatmul, PyNumber_InPlaceMatrixMultiply) WRAP_BINARY(proxy_imatmul, PyNumber_InPlaceMatrixMultiply)
static int static int
proxy_bool(PyWeakReference *proxy) proxy_bool(PyObject *proxy)
{ {
PyObject *o = PyWeakref_GET_OBJECT(proxy); PyObject *o = PyWeakref_GET_OBJECT(proxy);
if (!proxy_checkref(proxy)) { if (!proxy_check_ref(o)) {
return -1; return -1;
} }
Py_INCREF(o); Py_INCREF(o);
@ -564,12 +559,12 @@ proxy_dealloc(PyWeakReference *self)
/* sequence slots */ /* sequence slots */
static int static int
proxy_contains(PyWeakReference *proxy, PyObject *value) proxy_contains(PyObject *proxy, PyObject *value)
{ {
if (!proxy_checkref(proxy))
return -1;
PyObject *obj = PyWeakref_GET_OBJECT(proxy); PyObject *obj = PyWeakref_GET_OBJECT(proxy);
if (!proxy_check_ref(obj)) {
return -1;
}
Py_INCREF(obj); Py_INCREF(obj);
int res = PySequence_Contains(obj, value); int res = PySequence_Contains(obj, value);
Py_DECREF(obj); Py_DECREF(obj);
@ -579,12 +574,12 @@ proxy_contains(PyWeakReference *proxy, PyObject *value)
/* mapping slots */ /* mapping slots */
static Py_ssize_t static Py_ssize_t
proxy_length(PyWeakReference *proxy) proxy_length(PyObject *proxy)
{ {
if (!proxy_checkref(proxy))
return -1;
PyObject *obj = PyWeakref_GET_OBJECT(proxy); PyObject *obj = PyWeakref_GET_OBJECT(proxy);
if (!proxy_check_ref(obj)) {
return -1;
}
Py_INCREF(obj); Py_INCREF(obj);
Py_ssize_t res = PyObject_Length(obj); Py_ssize_t res = PyObject_Length(obj);
Py_DECREF(obj); Py_DECREF(obj);
@ -594,12 +589,12 @@ proxy_length(PyWeakReference *proxy)
WRAP_BINARY(proxy_getitem, PyObject_GetItem) WRAP_BINARY(proxy_getitem, PyObject_GetItem)
static int static int
proxy_setitem(PyWeakReference *proxy, PyObject *key, PyObject *value) proxy_setitem(PyObject *proxy, PyObject *key, PyObject *value)
{ {
if (!proxy_checkref(proxy))
return -1;
PyObject *obj = PyWeakref_GET_OBJECT(proxy); PyObject *obj = PyWeakref_GET_OBJECT(proxy);
if (!proxy_check_ref(obj)) {
return -1;
}
Py_INCREF(obj); Py_INCREF(obj);
int res; int res;
if (value == NULL) { if (value == NULL) {
@ -614,11 +609,12 @@ proxy_setitem(PyWeakReference *proxy, PyObject *key, PyObject *value)
/* iterator slots */ /* iterator slots */
static PyObject * static PyObject *
proxy_iter(PyWeakReference *proxy) proxy_iter(PyObject *proxy)
{ {
if (!proxy_checkref(proxy))
return NULL;
PyObject *obj = PyWeakref_GET_OBJECT(proxy); PyObject *obj = PyWeakref_GET_OBJECT(proxy);
if (!proxy_check_ref(obj)) {
return NULL;
}
Py_INCREF(obj); Py_INCREF(obj);
PyObject* res = PyObject_GetIter(obj); PyObject* res = PyObject_GetIter(obj);
Py_DECREF(obj); Py_DECREF(obj);
@ -626,12 +622,12 @@ proxy_iter(PyWeakReference *proxy)
} }
static PyObject * static PyObject *
proxy_iternext(PyWeakReference *proxy) proxy_iternext(PyObject *proxy)
{ {
if (!proxy_checkref(proxy))
return NULL;
PyObject *obj = PyWeakref_GET_OBJECT(proxy); PyObject *obj = PyWeakref_GET_OBJECT(proxy);
if (!proxy_check_ref(obj)) {
return NULL;
}
if (!PyIter_Check(obj)) { if (!PyIter_Check(obj)) {
PyErr_Format(PyExc_TypeError, PyErr_Format(PyExc_TypeError,
"Weakref proxy referenced a non-iterator '%.200s' object", "Weakref proxy referenced a non-iterator '%.200s' object",
@ -666,7 +662,7 @@ static PyNumberMethods proxy_as_number = {
proxy_neg, /*nb_negative*/ proxy_neg, /*nb_negative*/
proxy_pos, /*nb_positive*/ proxy_pos, /*nb_positive*/
proxy_abs, /*nb_absolute*/ proxy_abs, /*nb_absolute*/
(inquiry)proxy_bool, /*nb_bool*/ proxy_bool, /*nb_bool*/
proxy_invert, /*nb_invert*/ proxy_invert, /*nb_invert*/
proxy_lshift, /*nb_lshift*/ proxy_lshift, /*nb_lshift*/
proxy_rshift, /*nb_rshift*/ proxy_rshift, /*nb_rshift*/
@ -696,20 +692,20 @@ static PyNumberMethods proxy_as_number = {
}; };
static PySequenceMethods proxy_as_sequence = { static PySequenceMethods proxy_as_sequence = {
(lenfunc)proxy_length, /*sq_length*/ proxy_length, /*sq_length*/
0, /*sq_concat*/ 0, /*sq_concat*/
0, /*sq_repeat*/ 0, /*sq_repeat*/
0, /*sq_item*/ 0, /*sq_item*/
0, /*sq_slice*/ 0, /*sq_slice*/
0, /*sq_ass_item*/ 0, /*sq_ass_item*/
0, /*sq_ass_slice*/ 0, /*sq_ass_slice*/
(objobjproc)proxy_contains, /* sq_contains */ proxy_contains, /* sq_contains */
}; };
static PyMappingMethods proxy_as_mapping = { static PyMappingMethods proxy_as_mapping = {
(lenfunc)proxy_length, /*mp_length*/ proxy_length, /*mp_length*/
proxy_getitem, /*mp_subscript*/ proxy_getitem, /*mp_subscript*/
(objobjargproc)proxy_setitem, /*mp_ass_subscript*/ proxy_setitem, /*mp_ass_subscript*/
}; };
@ -734,7 +730,7 @@ _PyWeakref_ProxyType = {
0, /* tp_call */ 0, /* tp_call */
proxy_str, /* tp_str */ proxy_str, /* tp_str */
proxy_getattr, /* tp_getattro */ proxy_getattr, /* tp_getattro */
(setattrofunc)proxy_setattr, /* tp_setattro */ proxy_setattr, /* tp_setattro */
0, /* tp_as_buffer */ 0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */
0, /* tp_doc */ 0, /* tp_doc */
@ -742,8 +738,8 @@ _PyWeakref_ProxyType = {
(inquiry)gc_clear, /* tp_clear */ (inquiry)gc_clear, /* tp_clear */
proxy_richcompare, /* tp_richcompare */ proxy_richcompare, /* tp_richcompare */
0, /* tp_weaklistoffset */ 0, /* tp_weaklistoffset */
(getiterfunc)proxy_iter, /* tp_iter */ proxy_iter, /* tp_iter */
(iternextfunc)proxy_iternext, /* tp_iternext */ proxy_iternext, /* tp_iternext */
proxy_methods, /* tp_methods */ proxy_methods, /* tp_methods */
}; };
@ -768,7 +764,7 @@ _PyWeakref_CallableProxyType = {
proxy_call, /* tp_call */ proxy_call, /* tp_call */
proxy_str, /* tp_str */ proxy_str, /* tp_str */
proxy_getattr, /* tp_getattro */ proxy_getattr, /* tp_getattro */
(setattrofunc)proxy_setattr, /* tp_setattro */ proxy_setattr, /* tp_setattro */
0, /* tp_as_buffer */ 0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */
0, /* tp_doc */ 0, /* tp_doc */
@ -776,8 +772,8 @@ _PyWeakref_CallableProxyType = {
(inquiry)gc_clear, /* tp_clear */ (inquiry)gc_clear, /* tp_clear */
proxy_richcompare, /* tp_richcompare */ proxy_richcompare, /* tp_richcompare */
0, /* tp_weaklistoffset */ 0, /* tp_weaklistoffset */
(getiterfunc)proxy_iter, /* tp_iter */ proxy_iter, /* tp_iter */
(iternextfunc)proxy_iternext, /* tp_iternext */ proxy_iternext, /* tp_iternext */
}; };