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gh-124153: Clean up workarounds for PyType_GetBaseByToken() performance #124323

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gh-124153: Clean up workarounds for PyType_GetBaseByToken() performance #124323

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04b2381
abandon if-else chains for maintainability
neonene Sep 22, 2024
c2cabd1
add forward declarations
neonene Sep 22, 2024
ead4411
move down get_base_by_token_from_mro()
neonene Sep 22, 2024
7349f97
move down check_base_by_token()
neonene Sep 22, 2024
f938abc
move down get_base_by_token_recursive()
neonene Sep 22, 2024
516d2fb
add again a comment about gotos
neonene Sep 23, 2024
3783982
Merge branch 'main' into bytokens
neonene Sep 24, 2024
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move down check_base_by_token()
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@neonene
neonene authored Sep 22, 2024
commit 7349f97bd47e0f5e54cd15ae6848169daa57a665
54 changes: 27 additions & 27 deletions Objects/typeobject.c
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Original file line number Diff line number Diff line change
Expand Up @@ -5323,33 +5323,6 @@ get_base_by_token_recursive(PyTypeObject *type, void *token)
return NULL;
}

static int
check_base_by_token(PyTypeObject *type, void *token) {
if (token == NULL) {
PyErr_Format(PyExc_SystemError,
"PyType_GetBaseByToken called with token=NULL");
return -1;
}
if (!PyType_Check(type)) {
PyErr_Format(PyExc_TypeError,
"expected a type, got a '%T' object", type);
return -1;
}
if (!_PyType_HasFeature(type, Py_TPFLAGS_HEAPTYPE)) {
return 0;
}
if (((PyHeapTypeObject*)type)->ht_token == token) {
return 1;
}
if (type->tp_mro != NULL) {
// This will not be inlined
return get_base_by_token_from_mro(type, token) ? 1 : 0;
}
else {
return get_base_by_token_recursive(type, token) ? 1 : 0;
}
}

int
PyType_GetBaseByToken(PyTypeObject *type, void *token, PyTypeObject **result)
{
Expand Down Expand Up @@ -5420,6 +5393,33 @@ get_base_by_token_from_mro(PyTypeObject *type, void *token)
return NULL;
}

static int
check_base_by_token(PyTypeObject *type, void *token) {
if (token == NULL) {
PyErr_Format(PyExc_SystemError,
"PyType_GetBaseByToken called with token=NULL");
return -1;
}
if (!PyType_Check(type)) {
PyErr_Format(PyExc_TypeError,
"expected a type, got a '%T' object", type);
return -1;
}
if (!_PyType_HasFeature(type, Py_TPFLAGS_HEAPTYPE)) {
return 0;
}
if (((PyHeapTypeObject*)type)->ht_token == token) {
return 1;
}
if (type->tp_mro != NULL) {
// This will not be inlined
return get_base_by_token_from_mro(type, token) ? 1 : 0;
}
else {
return get_base_by_token_recursive(type, token) ? 1 : 0;
}
}


void *
PyObject_GetTypeData(PyObject *obj, PyTypeObject *cls)
Expand Down