8000 bpo-46323: Use PyObject_Vectorcall while calling ctypes callback function by corona10 · Pull Request #31138 · python/cpython · GitHub
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bpo-46323: Use PyObject_Vectorcall while calling ctypes callback function #31138

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Merged
merged 10 commits into from
Feb 8, 2022
Merged

bpo-46323: Use PyObject_Vectorcall while calling ctypes callback function #31138

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53bcb97
bpo-46323: Use PyObject_Vectorcall while calling ctypes callback funtion
corona10 Feb 5, 2022
403b94a
bpo-46323: Check lint
corona10 Feb 5, 2022
eba3eea
bpo-46323: fix typo
corona10 Feb 5, 2022
e11a6ab
bpo-46323 Address Victor's suggestion
corona10 Feb 5, 2022
43cc3d8
bpo-46323: Use PySequence_Fast_ITEMS if possible
corona10 Feb 7, 2022
afd67eb
bpo-46323 nit
corona10 Feb 7, 2022
4b18483
bpo-46323 Address code review
corona10 Feb 8, 2022
fad4210
bpo-46323 Address code review
corona10 Feb 8, 2022
dae7d5b
bpo-46323 Address code review
corona10 Feb 8, 2022
c4db624
bpo-46323 Update
corona10 Feb 8, 2022
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bpo-46323: Use PyObject_Vectorcall while calling ctypes callback funtion
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@corona10
corona10 committed Feb 8, 2022
commit 53bcb976217a7b1aa2fae328ac98f08558be1495
2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Core and Builtins/2022-02-05-14-46-21.bpo-46323.FC1OJg.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
Use :c:func:`PyObject_Vectorcall` while calling ctypes callback funtion.
Patch by Dong-hee Na.
32 changes: 21 additions & 11 deletions Modules/_ctypes/callbacks.c
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Original file line number Diff line number Diff line change
Expand Up @@ -146,9 +146,7 @@ static void _CallPythonObject(void *mem,
int flags,
void **pArgs)
{
Py_ssize_t i;
PyObject *result;
PyObject *arglist = NULL;
Py_ssize_t nArgs;
PyObject *error_object = NULL;
int *space;
Expand All @@ -163,12 +161,19 @@ static void _CallPythonObject(void *mem,
goto Done;
}

arglist = PyTuple_New(nArgs);
if (!arglist) {
PrintError("PyTuple_New()");
goto Done;
PyObject *args_stack[_PY_FASTCALL_SMALL_STACK];
PyObject **args;
if (nArgs <= (Py_ssize_t)Py_ARRAY_LENGTH(args_stack)) {
args = args_stack;
}
for (i = 0; i < nArgs; ++i) {
else {
args = PyMem_Malloc(nArgs * sizeof(PyObject *));
if (args == NULL) {
PyErr_NoMemory();
goto Done;
}
}
for (Py_ssize_t i = 0; i < nArgs; ++i) {
/* Note: new reference! */
PyObject *cnv = PySequence_GetItem(converters, i);
StgDictObject *dict;
Expand All @@ -186,7 +191,7 @@ static void _CallPythonObject(void *mem,
Py_DECREF(cnv);
goto Done;
}
PyTuple_SET_ITEM(arglist, i, v);
args[i] = v;
/* XXX XXX XX
We have the problem that c_byte or c_short have dict->size of
1 resp. 4, but these parameters are pushed as sizeof(int) bytes.
Expand All @@ -207,7 +212,7 @@ static void _CallPythonObject(void *mem,
goto Done;
}
memcpy(obj->b_ptr, *pArgs, dict->size);
PyTuple_SET_ITEM(arglist, i, (PyObject *)obj);
args[i] = (PyObject *)obj;
#ifdef MS_WIN32
TryAddRef(dict, obj);
#endif
Expand Down Expand Up @@ -241,7 +246,7 @@ static void _CallPythonObject(void *mem,
#endif
}

result = PyObject_CallObject(callable, arglist);
result = PyObject_Vectorcall(callable, args, nArgs, NULL);
if (result == NULL) {
_PyErr_WriteUnraisableMsg("on calling ctypes callback function",
callable);
Expand Down Expand Up @@ -308,7 +313,12 @@ static void _CallPythonObject(void *mem,
Py_XDECREF(result);

Done:
Py_XDECREF(arglist);
for (Py_ssize_t i = 0; i < nArgs; i++) {
Py_XDECREF(args[i]);
}
if (args != args_stack) {
PyMem_Free(args);
}
PyGILState_Release(state);
}

Expand Down
0