From 8e31cdc9450b3e644d48954865568e162edad514 Mon Sep 17 00:00:00 2001 From: AN Long Date: Thu, 18 Jan 2024 23:30:27 +0800 Subject: [PATCH] gh-103092: Convert some `_ctypes` metatypes to heap types (GH-113620) Co-authored-by: Erlend E. Aasland --- Modules/_ctypes/_ctypes.c | 397 ++++++++++++-------------------------- Modules/_ctypes/ctypes.h | 25 +-- 2 files changed, 141 insertions(+), 281 deletions(-) diff --git a/Modules/_ctypes/_ctypes.c b/Modules/_ctypes/_ctypes.c index fc16b9176fd..b51a03b5497 100644 --- a/Modules/_ctypes/_ctypes.c +++ b/Modules/_ctypes/_ctypes.c @@ -876,20 +876,6 @@ CDataType_repeat(PyObject *self, Py_ssize_t length) return PyCArrayType_from_ctype(self, length); } -static PySequenceMethods CDataType_as_sequence = { - 0, /* inquiry sq_length; */ - 0, /* binaryfunc sq_concat; */ - CDataType_repeat, /* intargfunc sq_repeat; */ - 0, /* intargfunc sq_item; */ - 0, /* intintargfunc sq_slice; */ - 0, /* intobjargproc sq_ass_item; */ - 0, /* intintobjargproc sq_ass_slice; */ - 0, /* objobjproc sq_contains; */ - - 0, /* binaryfunc sq_inplace_concat; */ - 0, /* intargfunc sq_inplace_repeat; */ -}; - static int CDataType_clear(PyTypeObject *self) { @@ -903,8 +889,10 @@ static int CDataType_traverse(PyTypeObject *self, visitproc visit, void *arg) { StgDictObject *dict = PyType_stgdict((PyObject *)self); - if (dict) + if (dict) { Py_VISIT(dict->proto); + } + Py_VISIT(Py_TYPE(self)); return PyType_Type.tp_traverse((PyObject *)self, visit, arg); } @@ -935,91 +923,45 @@ UnionType_setattro(PyObject *self, PyObject *key, PyObject *value) return 0; } +static PyType_Slot pycstruct_type_slots[] = { + {Py_tp_setattro, PyCStructType_setattro}, + {Py_tp_doc, PyDoc_STR("metatype for the CData Objects")}, + {Py_tp_traverse, CDataType_traverse}, + {Py_tp_clear, CDataType_clear}, + {Py_tp_methods, CDataType_methods}, + {Py_tp_new, PyCStructType_new}, -PyTypeObject PyCStructType_Type = { - PyVarObject_HEAD_INIT(NULL, 0) - "_ctypes.PyCStructType", /* tp_name */ - 0, /* tp_basicsize */ - 0, /* tp_itemsize */ - 0, /* tp_dealloc */ - 0, /* tp_vectorcall_offset */ - 0, /* tp_getattr */ - 0, /* tp_setattr */ - 0, /* tp_as_async */ - 0, /* tp_repr */ - 0, /* tp_as_number */ - &CDataType_as_sequence, /* tp_as_sequence */ - 0, /* tp_as_mapping */ - 0, /* tp_hash */ - 0, /* tp_call */ - 0, /* tp_str */ - 0, /* tp_getattro */ - PyCStructType_setattro, /* tp_setattro */ - 0, /* tp_as_buffer */ - Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, /* tp_flags */ - PyDoc_STR("metatype for the CData Objects"), /* tp_doc */ - (traverseproc)CDataType_traverse, /* tp_traverse */ - (inquiry)CDataType_clear, /* tp_clear */ - 0, /* tp_richcompare */ - 0, /* tp_weaklistoffset */ - 0, /* tp_iter */ - 0, /* tp_iternext */ - CDataType_methods, /* tp_methods */ - 0, /* tp_members */ - 0, /* tp_getset */ - 0, /* tp_base */ - 0, /* tp_dict */ - 0, /* tp_descr_get */ - 0, /* tp_descr_set */ - 0, /* tp_dictoffset */ - 0, /* tp_init */ - 0, /* tp_alloc */ - PyCStructType_new, /* tp_new */ - 0, /* tp_free */ + // Sequence protocol. + {Py_sq_repeat, CDataType_repeat}, + {0, NULL}, }; -static PyTypeObject UnionType_Type = { - PyVarObject_HEAD_INIT(NULL, 0) - "_ctypes.UnionType", /* tp_name */ - 0, /* tp_basicsize */ - 0, /* tp_itemsize */ - 0, /* tp_dealloc */ - 0, /* tp_vectorcall_offset */ - 0, /* tp_getattr */ - 0, /* tp_setattr */ - 0, /* tp_as_async */ - 0, /* tp_repr */ - 0, /* tp_as_number */ - &CDataType_as_sequence, /* tp_as_sequence */ - 0, /* tp_as_mapping */ - 0, /* tp_hash */ - 0, /* tp_call */ - 0, /* tp_str */ - 0, /* tp_getattro */ - UnionType_setattro, /* tp_setattro */ - 0, /* tp_as_buffer */ - Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, /* tp_flags */ - PyDoc_STR("metatype for the CData Objects"), /* tp_doc */ - (traverseproc)CDataType_traverse, /* tp_traverse */ - (inquiry)CDataType_clear, /* tp_clear */ - 0, /* tp_richcompare */ - 0, /* tp_weaklistoffset */ - 0, /* tp_iter */ - 0, /* tp_iternext */ - CDataType_methods, /* tp_methods */ - 0, /* tp_members */ - 0, /* tp_getset */ - 0, /* tp_base */ - 0, /* tp_dict */ - 0, /* tp_descr_get */ - 0, /* tp_descr_set */ - 0, /* tp_dictoffset */ - 0, /* tp_init */ - 0, /* tp_alloc */ - UnionType_new, /* tp_new */ - 0, /* tp_free */ +PyType_Spec pycstruct_type_spec = { + .name = "_ctypes.PyCStructType", + .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC | + Py_TPFLAGS_IMMUTABLETYPE), + .slots = pycstruct_type_slots, }; +static PyType_Slot union_type_slots[] = { + {Py_tp_setattro, UnionType_setattro}, + {Py_tp_doc, PyDoc_STR("metatype for the Union Objects")}, + {Py_tp_traverse, CDataType_traverse}, + {Py_tp_clear, CDataType_clear}, + {Py_tp_methods, CDataType_methods}, + {Py_tp_new, UnionType_new}, + + // Sequence protocol. + {Py_sq_repeat, CDataType_repeat}, + {0, NULL}, +}; + +static PyType_Spec union_type_spec = { + .name = "_ctypes.UnionType", + .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC | + Py_TPFLAGS_IMMUTABLETYPE), + .slots = union_type_slots, +}; /******************************************************************/ @@ -1234,46 +1176,23 @@ static PyMethodDef PyCPointerType_methods[] = { { NULL, NULL }, }; -PyTypeObject PyCPointerType_Type = { - PyVarObject_HEAD_INIT(NULL, 0) - "_ctypes.PyCPointerType", /* tp_name */ - 0, /* tp_basicsize */ - 0, /* tp_itemsize */ - 0, /* tp_dealloc */ - 0, /* tp_vectorcall_offset */ - 0, /* tp_getattr */ - 0, /* tp_setattr */ - 0, /* tp_as_async */ - 0, /* tp_repr */ - 0, /* tp_as_number */ - &CDataType_as_sequence, /* tp_as_sequence */ - 0, /* tp_as_mapping */ - 0, /* tp_hash */ - 0, /* tp_call */ - 0, /* tp_str */ - 0, /* tp_getattro */ - 0, /* tp_setattro */ - 0, /* tp_as_buffer */ - Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, /* tp_flags */ - PyDoc_STR("metatype for the Pointer Objects"), /* tp_doc */ - (traverseproc)CDataType_traverse, /* tp_traverse */ - (inquiry)CDataType_clear, /* tp_clear */ - 0, /* tp_richcompare */ - 0, /* tp_weaklistoffset */ - 0, /* tp_iter */ - 0, /* tp_iternext */ - PyCPointerType_methods, /* tp_methods */ - 0, /* tp_members */ - 0, /* tp_getset */ - 0, /* tp_base */ - 0, /* tp_dict */ - 0, /* tp_descr_get */ - 0, /* tp_descr_set */ - 0, /* tp_dictoffset */ - 0, /* tp_init */ - 0, /* tp_alloc */ - PyCPointerType_new, /* tp_new */ - 0, /* tp_free */ +static PyType_Slot pycpointer_type_slots[] = { + {Py_tp_doc, PyDoc_STR("metatype for the Pointer Objects")}, + {Py_tp_traverse, CDataType_traverse}, + {Py_tp_clear, CDataType_clear}, + {Py_tp_methods, PyCPointerType_methods}, + {Py_tp_new, PyCPointerType_new}, + + // Sequence protocol. + {Py_sq_repeat, CDataType_repeat}, + {0, NULL}, +}; + +static PyType_Spec pycpointer_type_spec = { + .name = "_ctypes.PyCPointerType", + .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC | + Py_TPFLAGS_IMMUTABLETYPE), + .slots = pycpointer_type_slots, }; @@ -1606,48 +1525,24 @@ error: return NULL; } -PyTypeObject PyCArrayType_Type = { - PyVarObject_HEAD_INIT(NULL, 0) - "_ctypes.PyCArrayType", /* tp_name */ - 0, /* tp_basicsize */ - 0, /* tp_itemsize */ - 0, /* tp_dealloc */ - 0, /* tp_vectorcall_offset */ - 0, /* tp_getattr */ - 0, /* tp_setattr */ - 0, /* tp_as_async */ - 0, /* tp_repr */ - 0, /* tp_as_number */ - &CDataType_as_sequence, /* tp_as_sequence */ - 0, /* tp_as_mapping */ - 0, /* tp_hash */ - 0, /* tp_call */ - 0, /* tp_str */ - 0, /* tp_getattro */ - 0, /* tp_setattro */ - 0, /* tp_as_buffer */ - Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */ - PyDoc_STR("metatype for the Array Objects"), /* tp_doc */ - 0, /* tp_traverse */ - 0, /* tp_clear */ - 0, /* tp_richcompare */ - 0, /* tp_weaklistoffset */ - 0, /* tp_iter */ - 0, /* tp_iternext */ - CDataType_methods, /* tp_methods */ - 0, /* tp_members */ - 0, /* tp_getset */ - 0, /* tp_base */ - 0, /* tp_dict */ - 0, /* tp_descr_get */ - 0, /* tp_descr_set */ - 0, /* tp_dictoffset */ - 0, /* tp_init */ - 0, /* tp_alloc */ - PyCArrayType_new, /* tp_new */ - 0, /* tp_free */ +static PyType_Slot pycarray_type_slots[] = { + {Py_tp_doc, PyDoc_STR("metatype for the Array Objects")}, + {Py_tp_traverse, CDataType_traverse}, + {Py_tp_methods, CDataType_methods}, + {Py_tp_new, PyCArrayType_new}, + {Py_tp_clear, CDataType_clear}, + + // Sequence protocol. + {Py_sq_repeat, CDataType_repeat}, + {0, NULL}, }; +static PyType_Spec pycarray_type_spec = { + .name = "_ctypes.PyCArrayType", + .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC | + Py_TPFLAGS_IMMUTABLETYPE), + .slots = pycarray_type_slots, +}; /******************************************************************/ /* @@ -2175,7 +2070,11 @@ PyCSimpleType_new(PyTypeObject *type, PyObject *args, PyObject *kwds) } } - if (type == &PyCSimpleType_Type && fmt->setfunc_swapped && fmt->getfunc_swapped) { + ctypes_state *st = GLOBAL_STATE(); + if (type == st->PyCSimpleType_Type + && fmt->setfunc_swapped + && fmt->getfunc_swapped) + { PyObject *swapped = CreateSwappedType(type, args, kwds, proto, fmt); StgDictObject *sw_dict; @@ -2292,46 +2191,23 @@ static PyMethodDef PyCSimpleType_methods[] = { { NULL, NULL }, }; -PyTypeObject PyCSimpleType_Type = { - PyVarObject_HEAD_INIT(NULL, 0) - "_ctypes.PyCSimpleType", /* tp_name */ - 0, /* tp_basicsize */ - 0, /* tp_itemsize */ - 0, /* tp_dealloc */ - 0, /* tp_vectorcall_offset */ - 0, /* tp_getattr */ - 0, /* tp_setattr */ - 0, /* tp_as_async */ - 0, /* tp_repr */ - 0, /* tp_as_number */ - &CDataType_as_sequence, /* tp_as_sequence */ - 0, /* tp_as_mapping */ - 0, /* tp_hash */ - 0, /* tp_call */ - 0, /* tp_str */ - 0, /* tp_getattro */ - 0, /* tp_setattro */ - 0, /* tp_as_buffer */ - Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */ - PyDoc_STR("metatype for the PyCSimpleType Objects"), /* tp_doc */ - 0, /* tp_traverse */ - 0, /* tp_clear */ - 0, /* tp_richcompare */ - 0, /* tp_weaklistoffset */ - 0, /* tp_iter */ - 0, /* tp_iternext */ - PyCSimpleType_methods, /* tp_methods */ - 0, /* tp_members */ - 0, /* tp_getset */ - 0, /* tp_base */ - 0, /* tp_dict */ - 0, /* tp_descr_get */ - 0, /* tp_descr_set */ - 0, /* tp_dictoffset */ - 0, /* tp_init */ - 0, /* tp_alloc */ - PyCSimpleType_new, /* tp_new */ - 0, /* tp_free */ +static PyType_Slot pycsimple_type_slots[] = { + {Py_tp_doc, PyDoc_STR("metatype for the PyCSimpleType Objects")}, + {Py_tp_methods, PyCSimpleType_methods}, + {Py_tp_new, PyCSimpleType_new}, + {Py_tp_traverse, CDataType_traverse}, + {Py_tp_clear, CDataType_clear}, + + // Sequence protocol. + {Py_sq_repeat, CDataType_repeat}, + {0, NULL}, +}; + +PyType_Spec pycsimple_type_spec = { + .name = "_ctypes.PyCSimpleType", + .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC | + Py_TPFLAGS_IMMUTABLETYPE), + .slots = pycsimple_type_slots, }; /******************************************************************/ @@ -2575,46 +2451,23 @@ PyCFuncPtrType_new(PyTypeObject *type, PyObject *args, PyObject *kwds) return (PyObject *)result; } -PyTypeObject PyCFuncPtrType_Type = { - PyVarObject_HEAD_INIT(NULL, 0) - "_ctypes.PyCFuncPtrType", /* tp_name */ - 0, /* tp_basicsize */ - 0, /* tp_itemsize */ - 0, /* tp_dealloc */ - 0, /* tp_vectorcall_offset */ - 0, /* tp_getattr */ - 0, /* tp_setattr */ - 0, /* tp_as_async */ - 0, /* tp_repr */ - 0, /* tp_as_number */ - &CDataType_as_sequence, /* tp_as_sequence */ - 0, /* tp_as_mapping */ - 0, /* tp_hash */ - 0, /* tp_call */ - 0, /* tp_str */ - 0, /* tp_getattro */ - 0, /* tp_setattro */ - 0, /* tp_as_buffer */ - Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, /* tp_flags */ - PyDoc_STR("metatype for C function pointers"), /* tp_doc */ - (traverseproc)CDataType_traverse, /* tp_traverse */ - (inquiry)CDataType_clear, /* tp_clear */ - 0, /* tp_richcompare */ - 0, /* tp_weaklistoffset */ - 0, /* tp_iter */ - 0, /* tp_iternext */ - CDataType_methods, /* tp_methods */ - 0, /* tp_members */ - 0, /* tp_getset */ - 0, /* tp_base */ - 0, /* tp_dict */ - 0, /* tp_descr_get */ - 0, /* tp_descr_set */ - 0, /* tp_dictoffset */ - 0, /* tp_init */ - 0, /* tp_alloc */ - PyCFuncPtrType_new, /* tp_new */ - 0, /* tp_free */ +static PyType_Slot pycfuncptr_type_slots[] = { + {Py_tp_doc, PyDoc_STR("metatype for C function pointers")}, + {Py_tp_traverse, CDataType_traverse}, + {Py_tp_clear, CDataType_clear}, + {Py_tp_methods, CDataType_methods}, + {Py_tp_new, PyCFuncPtrType_new}, + + // Sequence protocol. + {Py_sq_repeat, CDataType_repeat}, + {0, NULL}, +}; + +static PyType_Spec pycfuncptr_type_spec = { + .name = "_ctypes.PyCFuncPtrType", + .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC | + Py_TPFLAGS_IMMUTABLETYPE), + .slots = pycfuncptr_type_slots, }; @@ -4881,7 +4734,8 @@ PyCArrayType_from_ctype(PyObject *itemtype, Py_ssize_t length) ((PyTypeObject *)itemtype)->tp_name, (long)length); #endif - result = PyObject_CallFunction((PyObject *)&PyCArrayType_Type, + ctypes_state *st = GLOBAL_STATE(); + result = PyObject_CallFunction((PyObject *)st->PyCArrayType_Type, "s(O){s:n,s:O}", name, &PyCArray_Type, @@ -5690,24 +5544,29 @@ _ctypes_add_types(PyObject *mod) * * Metaclasses */ - TYPE_READY_BASE(&PyCStructType_Type, &PyType_Type); - TYPE_READY_BASE(&UnionType_Type, &PyType_Type); - TYPE_READY_BASE(&PyCPointerType_Type, &PyType_Type); - TYPE_READY_BASE(&PyCArrayType_Type, &PyType_Type); - TYPE_READY_BASE(&PyCSimpleType_Type, &PyType_Type); - TYPE_READY_BASE(&PyCFuncPtrType_Type, &PyType_Type); + CREATE_TYPE(mod, st->PyCStructType_Type, &pycstruct_type_spec, + &PyType_Type); + CREATE_TYPE(mod, st->UnionType_Type, &union_type_spec, &PyType_Type); + CREATE_TYPE(mod, st->PyCPointerType_Type, &pycpointer_type_spec, + &PyType_Type); + CREATE_TYPE(mod, st->PyCArrayType_Type, &pycarray_type_spec, + &PyType_Type); + CREATE_TYPE(mod, st->PyCSimpleType_Type, &pycsimple_type_spec, + &PyType_Type); + CREATE_TYPE(mod, st->PyCFuncPtrType_Type, &pycfuncptr_type_spec, + &PyType_Type); /************************************************* * * Classes using a custom metaclass */ - MOD_ADD_TYPE(&Struct_Type, &PyCStructType_Type, &PyCData_Type); - MOD_ADD_TYPE(&Union_Type, &UnionType_Type, &PyCData_Type); - MOD_ADD_TYPE(&PyCPointer_Type, &PyCPointerType_Type, &PyCData_Type); - MOD_ADD_TYPE(&PyCArray_Type, &PyCArrayType_Type, &PyCData_Type); - MOD_ADD_TYPE(&Simple_Type, &PyCSimpleType_Type, &PyCData_Type); - MOD_ADD_TYPE(&PyCFuncPtr_Type, &PyCFuncPtrType_Type, &PyCData_Type); + MOD_ADD_TYPE(&Struct_Type, st->PyCStructType_Type, &PyCData_Type); + MOD_ADD_TYPE(&Union_Type, st->UnionType_Type, &PyCData_Type); + MOD_ADD_TYPE(&PyCPointer_Type, st->PyCPointerType_Type, &PyCData_Type); + MOD_ADD_TYPE(&PyCArray_Type, st->PyCArrayType_Type, &PyCData_Type); + MOD_ADD_TYPE(&Simple_Type, st->PyCSimpleType_Type, &PyCData_Type); + MOD_ADD_TYPE(&PyCFuncPtr_Type, st->PyCFuncPtrType_Type, &PyCData_Type); /************************************************* * diff --git a/Modules/_ctypes/ctypes.h b/Modules/_ctypes/ctypes.h index 8891a0a741d..55e9f777788 100644 --- a/Modules/_ctypes/ctypes.h +++ b/Modules/_ctypes/ctypes.h @@ -41,6 +41,12 @@ typedef struct { PyTypeObject *PyComError_Type; #endif PyTypeObject *StructParam_Type; + PyTypeObject *PyCStructType_Type; + PyTypeObject *UnionType_Type; + PyTypeObject *PyCPointerType_Type; + PyTypeObject *PyCArrayType_Type; + PyTypeObject *PyCSimpleType_Type; + PyTypeObject *PyCFuncPtrType_Type; } ctypes_state; extern ctypes_state global_state; @@ -118,7 +124,7 @@ typedef struct { Py_ssize_t b_size; /* size of memory block in bytes */ Py_ssize_t b_length; /* number of references we need */ Py_ssize_t b_index; /* index of this object into base's - b_object list */ + b_object list */ PyObject *b_objects; /* list of references we need to keep */ union value b_value; /* end of tagCDataObject, additional fields follow */ @@ -155,9 +161,8 @@ extern PyTypeObject PyCData_Type; #define CDataObject_Check(v) PyObject_TypeCheck(v, &PyCData_Type) #define _CDataObject_HasExternalBuffer(v) ((v)->b_ptr != (char *)&(v)->b_value) -extern PyTypeObject PyCSimpleType_Type; -#define PyCSimpleTypeObject_CheckExact(v) Py_IS_TYPE(v, &PyCSimpleType_Type) -#define PyCSimpleTypeObject_Check(v) PyObject_TypeCheck(v, &PyCSimpleType_Type) +#define PyCSimpleTypeObject_CheckExact(v) Py_IS_TYPE(v, GLOBAL_STATE()->PyCSimpleType_Type) +#define PyCSimpleTypeObject_Check(v) PyObject_TypeCheck(v, GLOBAL_STATE()->PyCSimpleType_Type) extern struct fielddesc *_ctypes_get_fielddesc(const char *fmt); @@ -171,21 +176,17 @@ PyCField_FromDesc(PyObject *desc, Py_ssize_t index, extern PyObject *PyCData_AtAddress(PyObject *type, void *buf); extern PyObject *PyCData_FromBytes(PyObject *type, char *data, Py_ssize_t length); -extern PyTypeObject PyCArrayType_Type; extern PyTypeObject PyCArray_Type; -extern PyTypeObject PyCPointerType_Type; extern PyTypeObject PyCPointer_Type; extern PyTypeObject PyCFuncPtr_Type; -extern PyTypeObject PyCFuncPtrType_Type; -extern PyTypeObject PyCStructType_Type; -#define PyCArrayTypeObject_Check(v) PyObject_TypeCheck(v, &PyCArrayType_Type) +#define PyCArrayTypeObject_Check(v) PyObject_TypeCheck(v, GLOBAL_STATE()->PyCArrayType_Type) #define ArrayObject_Check(v) PyObject_TypeCheck(v, &PyCArray_Type) #define PointerObject_Check(v) PyObject_TypeCheck(v, &PyCPointer_Type) -#define PyCPointerTypeObject_Check(v) PyObject_TypeCheck(v, &PyCPointerType_Type) +#define PyCPointerTypeObject_Check(v) PyObject_TypeCheck(v, GLOBAL_STATE()->PyCPointerType_Type) #define PyCFuncPtrObject_Check(v) PyObject_TypeCheck(v, &PyCFuncPtr_Type) -#define PyCFuncPtrTypeObject_Check(v) PyObject_TypeCheck(v, &PyCFuncPtrType_Type) -#define PyCStructTypeObject_Check(v) PyObject_TypeCheck(v, &PyCStructType_Type) +#define PyCFuncPtrTypeObject_Check(v) PyObject_TypeCheck(v, GLOBAL_STATE()->PyCFuncPtrType_Type) +#define PyCStructTypeObject_Check(v) PyObject_TypeCheck(v, GLOBAL_STATE()->PyCStructType_Type) extern PyObject * PyCArrayType_from_ctype(PyObject *itemtype, Py_ssize_t length);