gh-128421: make exception group methods thread safe (#129298)

Author: kumaraditya303

Objects/clinic/exceptions.c.h

@@ -20,8 +20,9 @@
 
 /*[clinic input]
 class BaseException "PyBaseExceptionObject *" "&PyExc_BaseException"
+class BaseExceptionGroup "PyBaseExceptionGroupObject *" "&PyExc_BaseExceptionGroup"
 [clinic start generated code]*/
-/*[clinic end generated code: output=da39a3ee5e6b4b0d input=90558eb0fbf8a3d0]*/
+/*[clinic end generated code: output=da39a3ee5e6b4b0d input=b7c45e78cff8edc3]*/
 
 
 /* Compatibility aliases */
@@ -1034,10 +1035,18 @@ BaseExceptionGroup_str(PyBaseExceptionGroupObject *self)
         self->msg, num_excs, num_excs > 1 ? "s" : "");
 }
 
+/*[clinic input]
+@critical_section
+BaseExceptionGroup.derive
+    excs: object
+    /
+[clinic start generated code]*/
+
 static PyObject *
-BaseExceptionGroup_derive(PyObject *self_, PyObject *excs)
+BaseExceptionGroup_derive_impl(PyBaseExceptionGroupObject *self,
+                               PyObject *excs)
+/*[clinic end generated code: output=4307564218dfbf06 input=f72009d38e98cec1]*/
 {
-    PyBaseExceptionGroupObject *self = _PyBaseExceptionGroupObject_cast(self_);
     PyObject *init_args = PyTuple_Pack(2, self->msg, excs);
     if (!init_args) {
         return NULL;
@@ -1330,8 +1339,17 @@ exceptiongroup_split_recursive(PyObject *exc,
     return retval;
 }
 
+/*[clinic input]
+@critical_section
+BaseExceptionGroup.split
+    matcher_value: object
+    /
+[clinic start generated code]*/
+
 static PyObject *
-BaseExceptionGroup_split(PyObject *self, PyObject *matcher_value)
+BaseExceptionGroup_split_impl(PyBaseExceptionGroupObject *self,
+                              PyObject *matcher_value)
+/*[clinic end generated code: output=d74db579da4df6e2 input=0c5cfbfed57e0052]*/
 {
     _exceptiongroup_split_matcher_type matcher_type;
     if (get_matcher_type(matcher_value, &matcher_type) < 0) {
@@ -1341,7 +1359,7 @@ BaseExceptionGroup_split(PyObject *self, PyObject *matcher_value)
     _exceptiongroup_split_result split_result;
     bool construct_rest = true;
     if (exceptiongroup_split_recursive(
-            self, matcher_type, matcher_value,
+            (PyObject *)self, matcher_type, matcher_value,
             construct_rest, &split_result) < 0) {
         return NULL;
     }
@@ -1356,8 +1374,17 @@ BaseExceptionGroup_split(PyObject *self, PyObject *matcher_value)
     return result;
 }
 
+/*[clinic input]
+@critical_section
+BaseExceptionGroup.subgroup
+    matcher_value: object
+    /
+[clinic start generated code]*/
+
 static PyObject *
-BaseExceptionGroup_subgroup(PyObject *self, PyObject *matcher_value)
+BaseExceptionGroup_subgroup_impl(PyBaseExceptionGroupObject *self,
+                                 PyObject *matcher_value)
+/*[clinic end generated code: output=07dbec8f77d4dd8e input=988ffdd755a151ce]*/
 {
     _exceptiongroup_split_matcher_type matcher_type;
     if (get_matcher_type(matcher_value, &matcher_type) < 0) {
@@ -1367,7 +1394,7 @@ BaseExceptionGroup_subgroup(PyObject *self, PyObject *matcher_value)
     _exceptiongroup_split_result split_result;
     bool construct_rest = false;
     if (exceptiongroup_split_recursive(
-            self, matcher_type, matcher_value,
+            (PyObject *)self, matcher_type, matcher_value,
             construct_rest, &split_result) < 0) {
         return NULL;
     }
@@ -1633,9 +1660,9 @@ static PyMemberDef BaseExceptionGroup_members[] = {
 static PyMethodDef BaseExceptionGroup_methods[] = {
     {"__class_getitem__", (PyCFunction)Py_GenericAlias,
       METH_O|METH_CLASS, PyDoc_STR("See PEP 585")},
-    {"derive", (PyCFunction)BaseExceptionGroup_derive, METH_O},
-    {"split", (PyCFunction)BaseExceptionGroup_split, METH_O},
-    {"subgroup", (PyCFunction)BaseExceptionGroup_subgroup, METH_O},
+    BASEEXCEPTIONGROUP_DERIVE_METHODDEF
+    BASEEXCEPTIONGROUP_SPLIT_METHODDEF
+    BASEEXCEPTIONGROUP_SUBGROUP_METHODDEF
     {NULL}
 };