bpo-45459: C API uses type names rather than structure names (GH-31528)

Thanks to the new pytypedefs.h, it becomes to use type names like
PyObject rather like structure names like "struct _object".

Include/cpython/abstract.h

@@ -133,7 +133,7 @@ PyAPI_FUNC(PyObject *) _PyObject_CallMethodId_SizeT(PyObject *obj,
 
 PyAPI_FUNC(PyObject *) _PyObject_CallMethodIdObjArgs(
     PyObject *obj,
-    struct _Py_Identifier *name,
+    _Py_Identifier *name,
     ...);
 
 static inline PyObject *

Include/cpython/descrobject.h

@@ -43,7 +43,7 @@ typedef struct {
 
 typedef struct {
     PyDescr_COMMON;
-    struct PyMemberDef *d_member;
+    PyMemberDef *d_member;
 } PyMemberDescrObject;
 
 typedef struct {

Include/cpython/dictobject.h

@@ -32,7 +32,7 @@ PyAPI_FUNC(PyObject *) _PyDict_GetItem_KnownHash(PyObject *mp, PyObject *key,
                                        Py_hash_t hash);
 PyAPI_FUNC(PyObject *) _PyDict_GetItemWithError(PyObject *dp, PyObject *key);
 PyAPI_FUNC(PyObject *) _PyDict_GetItemIdWithError(PyObject *dp,
-                                                  struct _Py_Identifier *key);
+                                                  _Py_Identifier *key);
 PyAPI_FUNC(PyObject *) _PyDict_GetItemStringWithError(PyObject *, const char *);
 PyAPI_FUNC(PyObject *) PyDict_SetDefault(
     PyObject *mp, PyObject *key, PyObject *defaultobj);
@@ -49,7 +49,7 @@ PyAPI_FUNC(int) _PyDict_Next(
 /* Get the number of items of a dictionary. */
 #define PyDict_GET_SIZE(mp)  (assert(PyDict_Check(mp)),((PyDictObject *)mp)->ma_used)
 PyAPI_FUNC(int) _PyDict_Contains_KnownHash(PyObject *, PyObject *, Py_hash_t);
-PyAPI_FUNC(int) _PyDict_ContainsId(PyObject *, struct _Py_Identifier *);
+PyAPI_FUNC(int) _PyDict_ContainsId(PyObject *, _Py_Identifier *);
 PyAPI_FUNC(PyObject *) _PyDict_NewPresized(Py_ssize_t minused);
 PyAPI_FUNC(void) _PyDict_MaybeUntrack(PyObject *mp);
 PyAPI_FUNC(int) _PyDict_HasOnlyStringKeys(PyObject *mp);
@@ -66,9 +66,9 @@ PyObject *_PyDict_FromKeys(PyObject *, PyObject *, PyObject *);
    argument is raised.
 */
 PyAPI_FUNC(int) _PyDict_MergeEx(PyObject *mp, PyObject *other, int override);
-PyAPI_FUNC(int) _PyDict_SetItemId(PyObject *dp, struct _Py_Identifier *key, PyObject *item);
+PyAPI_FUNC(int) _PyDict_SetItemId(PyObject *dp, _Py_Identifier *key, PyObject *item);
 
-PyAPI_FUNC(int) _PyDict_DelItemId(PyObject *mp, struct _Py_Identifier *key);
+PyAPI_FUNC(int) _PyDict_DelItemId(PyObject *mp, _Py_Identifier *key);
 PyAPI_FUNC(void) _PyDict_DebugMallocStats(FILE *out);
 
 int _PyObjectDict_SetItem(PyTypeObject *tp, PyObject **dictptr, PyObject *name, PyObject *value);

Include/cpython/frameobject.h

@@ -6,7 +6,7 @@
 
 struct _frame {
     PyObject_HEAD
-    struct _frame *f_back;      /* previous frame, or NULL */
+    PyFrameObject *f_back;      /* previous frame, or NULL */
     struct _interpreter_frame *f_frame; /* points to the frame data */
     PyObject *f_trace;          /* Trace function */
     int f_lineno;               /* Current line number. Only valid if non-zero */

Include/cpython/import.h

@@ -6,7 +6,7 @@ PyMODINIT_FUNC PyInit__imp(void);
 
 PyAPI_FUNC(int) _PyImport_IsInitialized(PyInterpreterState *);
 
-PyAPI_FUNC(PyObject *) _PyImport_GetModuleId(struct _Py_Identifier *name);
+PyAPI_FUNC(PyObject *) _PyImport_GetModuleId(_Py_Identifier *name);
 PyAPI_FUNC(int) _PyImport_SetModule(PyObject *name, PyObject *module);
 PyAPI_FUNC(int) _PyImport_SetModuleString(const char *name, PyObject* module);
 

Include/cpython/object.h

@@ -201,11 +201,11 @@ struct _typeobject {
     iternextfunc tp_iternext;
 
     /* Attribute descriptor and subclassing stuff */
-    struct PyMethodDef *tp_methods;
-    struct PyMemberDef *tp_members;
-    struct PyGetSetDef *tp_getset;
+    PyMethodDef *tp_methods;
+    PyMemberDef *tp_members;
+    PyGetSetDef *tp_getset;
     // Strong reference on a heap type, borrowed reference on a static type
-    struct _typeobject *tp_base;
+    PyTypeObject *tp_base;
     PyObject *tp_dict;
     descrgetfunc tp_descr_get;
     descrsetfunc tp_descr_set;
@@ -262,7 +262,7 @@ PyAPI_FUNC(PyObject *) _PyObject_LookupSpecialId(PyObject *, _Py_Identifier *);
 PyAPI_FUNC(PyTypeObject *) _PyType_CalculateMetaclass(PyTypeObject *, PyObject *);
 PyAPI_FUNC(PyObject *) _PyType_GetDocFromInternalDoc(const char *, const char *);
 PyAPI_FUNC(PyObject *) _PyType_GetTextSignatureFromInternalDoc(const char *, const char *);
-PyAPI_FUNC(PyObject *) PyType_GetModuleByDef(PyTypeObject *, struct PyModuleDef *);
+PyAPI_FUNC(PyObject *) PyType_GetModuleByDef(PyTypeObject *, PyModuleDef *);
 
 PyAPI_FUNC(int) PyObject_Print(PyObject *, FILE *, int);
 PyAPI_FUNC(void) _Py_BreakPoint(void);
@@ -270,8 +270,8 @@ PyAPI_FUNC(void) _PyObject_Dump(PyObject *);
 PyAPI_FUNC(int) _PyObject_IsFreed(PyObject *);
 
 PyAPI_FUNC(int) _PyObject_IsAbstract(PyObject *);
-PyAPI_FUNC(PyObject *) _PyObject_GetAttrId(PyObject *, struct _Py_Identifier *);
-PyAPI_FUNC(int) _PyObject_SetAttrId(PyObject *, struct _Py_Identifier *, PyObject *);
+PyAPI_FUNC(PyObject *) _PyObject_GetAttrId(PyObject *, _Py_Identifier *);
+PyAPI_FUNC(int) _PyObject_SetAttrId(PyObject *, _Py_Identifier *, PyObject *);
 /* Replacements of PyObject_GetAttr() and _PyObject_GetAttrId() which
    don't raise AttributeError.
 
@@ -282,7 +282,7 @@ PyAPI_FUNC(int) _PyObject_SetAttrId(PyObject *, struct _Py_Identifier *, PyObjec
    is raised.
 */
 PyAPI_FUNC(int) _PyObject_LookupAttr(PyObject *, PyObject *, PyObject **);
-PyAPI_FUNC(int) _PyObject_LookupAttrId(PyObject *, struct _Py_Identifier *, PyObject **);
+PyAPI_FUNC(int) _PyObject_LookupAttrId(PyObject *, _Py_Identifier *, PyObject **);
 
 PyAPI_FUNC(int) _PyObject_GetMethod(PyObject *obj, PyObject *name, PyObject **method);
 
@@ -461,8 +461,8 @@ passed as second argument to Py_TRASHCAN_BEGIN().
 */
 
 /* Python 3.9 private API, invoked by the macros below. */
-PyAPI_FUNC(int) _PyTrash_begin(struct _ts *tstate, PyObject *op);
-PyAPI_FUNC(void) _PyTrash_end(struct _ts *tstate);
+PyAPI_FUNC(int) _PyTrash_begin(PyThreadState *tstate, PyObject *op);
+PyAPI_FUNC(void) _PyTrash_end(PyThreadState *tstate);
 /* Python 3.10 private API, invoked by the Py_TRASHCAN_BEGIN(). */
 PyAPI_FUNC(int) _PyTrash_cond(PyObject *op, destructor dealloc);
 

Include/cpython/pystate.h

@@ -79,12 +79,11 @@ typedef struct _stack_chunk {
     PyObject * data[1]; /* Variable sized */
 } _PyStackChunk;
 
-// The PyThreadState typedef is in Include/pystate.h.
 struct _ts {
     /* See Python/ceval.c for comments explaining most fields */
 
-    struct _ts *prev;
-    struct _ts *next;
+    PyThreadState *prev;
+    PyThreadState *next;
     PyInterpreterState *interp;
 
     /* Has been initialized to a safe state.
@@ -308,12 +307,12 @@ PyAPI_FUNC(const PyConfig*) _Py_GetConfig(void);
 
 /* cross-interpreter data */
 
-struct _xid;
-
 // _PyCrossInterpreterData is similar to Py_buffer as an effectively
 // opaque struct that holds data outside the object machinery.  This
 // is necessary to pass safely between interpreters in the same process.
-typedef struct _xid {
+typedef struct _xid _PyCrossInterpreterData;
+
+struct _xid {
     // data is the cross-interpreter-safe derivation of a Python object
     // (see _PyObject_GetCrossInterpreterData).  It will be NULL if the
     // new_object func (below) encodes the data.
@@ -339,7 +338,7 @@ typedef struct _xid {
     // interpreter given the data.  The resulting object (a new
     // reference) will be equivalent to the original object.  This field
     // is required.
-    PyObject *(*new_object)(struct _xid *);
+    PyObject *(*new_object)(_PyCrossInterpreterData *);
     // free is called when the data is released.  If it is NULL then
     // nothing will be done to free the data.  For some types this is
     // okay (e.g. bytes) and for those types this field should be set
@@ -350,7 +349,7 @@ typedef struct _xid {
     // to PyMem_RawFree (the default if not explicitly set to NULL).
     // The call will happen with the original interpreter activated.
     void (*free)(void *);
-} _PyCrossInterpreterData;
+};
 
 PyAPI_FUNC(int) _PyObject_GetCrossInterpreterData(PyObject *, _PyCrossInterpreterData *);
 PyAPI_FUNC(PyObject *) _PyCrossInterpreterData_NewObject(_PyCrossInterpreterData *);
@@ -360,7 +359,7 @@ PyAPI_FUNC(int) _PyObject_CheckCrossInterpreterData(PyObject *);
 
 /* cross-interpreter data registry */
 
-typedef int (*crossinterpdatafunc)(PyObject *, struct _xid *);
+typedef int (*crossinterpdatafunc)(PyObject *, _PyCrossInterpreterData *);
 
 PyAPI_FUNC(int) _PyCrossInterpreterData_RegisterClass(PyTypeObject *, crossinterpdatafunc);
 PyAPI_FUNC(crossinterpdatafunc) _PyCrossInterpreterData_Lookup(PyObject *);

Include/cpython/traceback.h

@@ -2,13 +2,15 @@
 #  error "this header file must not be included directly"
 #endif
 
-typedef struct _traceback {
+typedef struct _traceback PyTracebackObject;
+
+struct _traceback {
     PyObject_HEAD
-    struct _traceback *tb_next;
+    PyTracebackObject *tb_next;
     PyFrameObject *tb_frame;
     int tb_lasti;
     int tb_lineno;
-} PyTracebackObject;
+};
 
 PyAPI_FUNC(int) _Py_DisplaySourceLine(PyObject *, PyObject *, int, int, int *, PyObject **);
 PyAPI_FUNC(void) _PyTraceback_Add(const char *, const char *, int);