cpython/Include/internal/pycore_object.h

#ifndef Py_INTERNAL_OBJECT_H
#define Py_INTERNAL_OBJECT_H
#ifdef __cplusplus
extern "C" {
#endif

#ifndef Py_BUILD_CORE
#  error "this header requires Py_BUILD_CORE define"
#endif

#include <stdbool.h>
#include "pycore_gc.h"            // _PyObject_GC_IS_TRACKED()
#include "pycore_emscripten_trampoline.h" // _PyCFunction_TrampolineCall()
#include "pycore_interp.h"        // PyInterpreterState.gc
#include "pycore_pyatomic_ft_wrappers.h"  // FT_ATOMIC_STORE_PTR_RELAXED
#include "pycore_pystate.h"       // _PyInterpreterState_GET()
#include "pycore_stackref.h"
#include "pycore_uniqueid.h"      // _PyObject_ThreadIncrefSlow()

// This value is added to `ob_ref_shared` for objects that use deferred
// reference counting so that they are not immediately deallocated when the
// non-deferred reference count drops to zero.
//
// The value is half the maximum shared refcount because the low two bits of
// `ob_ref_shared` are used for flags.
#define _Py_REF_DEFERRED …

/* For backwards compatibility -- Do not use this */
#define _Py_IsImmortalLoose(op) …


/* Check if an object is consistent. For example, ensure that the reference
   counter is greater than or equal to 1, and ensure that ob_type is not NULL.

   Call _PyObject_AssertFailed() if the object is inconsistent.

   If check_content is zero, only check header fields: reduce the overhead.

   The function always return 1. The return value is just here to be able to
   write:

   assert(_PyObject_CheckConsistency(obj, 1)); */
extern int _PyObject_CheckConsistency(PyObject *op, int check_content);

extern void _PyDebugAllocatorStats(FILE *out, const char *block_name,
                                   int num_blocks, size_t sizeof_block);

extern void _PyObject_DebugTypeStats(FILE *out);

#ifdef Py_TRACE_REFS
// Forget a reference registered by _Py_NewReference(). Function called by
// _Py_Dealloc().
//
// On a free list, the function can be used before modifying an object to
// remove the object from traced objects. Then _Py_NewReference() or
// _Py_NewReferenceNoTotal() should be called again on the object to trace
// it again.
extern void _Py_ForgetReference(PyObject *);
#endif

// Export for shared _testinternalcapi extension
PyAPI_FUNC(int) _PyObject_IsFreed(PyObject *);

/* We need to maintain an internal copy of Py{Var}Object_HEAD_INIT to avoid
   designated initializer conflicts in C++20. If we use the deinition in
   object.h, we will be mixing designated and non-designated initializers in
   pycore objects which is forbiddent in C++20. However, if we then use
   designated initializers in object.h then Extensions without designated break.
   Furthermore, we can't use designated initializers in Extensions since these
   are not supported pre-C++20. Thus, keeping an internal copy here is the most
   backwards compatible solution */
#if defined(Py_GIL_DISABLED)
#define _PyObject_HEAD_INIT …
#else
#define _PyObject_HEAD_INIT(type) …
#endif
#define _PyVarObject_HEAD_INIT(type, size) …

PyAPI_FUNC(void) _Py_NO_RETURN _Py_FatalRefcountErrorFunc(
    const char *func,
    const char *message);

#define _Py_FatalRefcountError(message) …

#define _PyReftracerTrack(obj, operation) …

#ifdef Py_REF_DEBUG
/* The symbol is only exposed in the API for the sake of extensions
   built against the pre-3.12 stable ABI. */
PyAPI_DATA(Py_ssize_t) _Py_RefTotal;

extern void _Py_AddRefTotal(PyThreadState *, Py_ssize_t);
extern void _Py_IncRefTotal(PyThreadState *);
extern void _Py_DecRefTotal(PyThreadState *);

#define _Py_DEC_REFTOTAL …
#endif

// Increment reference count by n
static inline void _Py_RefcntAdd(PyObject* op, Py_ssize_t n)
{ … }
#define _Py_RefcntAdd(op, n) …

// Checks if an object has a single, unique reference. If the caller holds a
// unique reference, it may be able to safely modify the object in-place.
static inline int
_PyObject_IsUniquelyReferenced(PyObject *ob)
{ … }

PyAPI_FUNC(void) _Py_SetImmortal(PyObject *op);
PyAPI_FUNC(void) _Py_SetImmortalUntracked(PyObject *op);

// Makes an immortal object mortal again with the specified refcnt. Should only
// be used during runtime finalization.
static inline void _Py_SetMortal(PyObject *op, Py_ssize_t refcnt)
{ … }

/* _Py_ClearImmortal() should only be used during runtime finalization. */
static inline void _Py_ClearImmortal(PyObject *op)
{ … }
#define _Py_ClearImmortal(op) …

#if !defined(Py_GIL_DISABLED)
static inline void
_Py_DECREF_SPECIALIZED(PyObject *op, const destructor destruct)
{ … }

static inline void
_Py_DECREF_NO_DEALLOC(PyObject *op)
{ … }

#else
// TODO: implement Py_DECREF specializations for Py_GIL_DISABLED build
static inline void
_Py_DECREF_SPECIALIZED(PyObject *op, const destructor destruct)
{
    Py_DECREF(op);
}

static inline void
_Py_DECREF_NO_DEALLOC(PyObject *op)
{
    Py_DECREF(op);
}

static inline int
_Py_REF_IS_MERGED(Py_ssize_t ob_ref_shared)
{
    return (ob_ref_shared & _Py_REF_SHARED_FLAG_MASK) == _Py_REF_MERGED;
}

static inline int
_Py_REF_IS_QUEUED(Py_ssize_t ob_ref_shared)
{
    return (ob_ref_shared & _Py_REF_SHARED_FLAG_MASK) == _Py_REF_QUEUED;
}

// Merge the local and shared reference count fields and add `extra` to the
// refcount when merging.
Py_ssize_t _Py_ExplicitMergeRefcount(PyObject *op, Py_ssize_t extra);
#endif // !defined(Py_GIL_DISABLED)

#ifdef Py_REF_DEBUG
#  undef _Py_DEC_REFTOTAL
#endif


extern int _PyType_CheckConsistency(PyTypeObject *type);
extern int _PyDict_CheckConsistency(PyObject *mp, int check_content);

/* Update the Python traceback of an object. This function must be called
   when a memory block is reused from a free list.

   Internal function called by _Py_NewReference(). */
extern int _PyTraceMalloc_TraceRef(PyObject *op, PyRefTracerEvent event, void*);

// Fast inlined version of PyType_HasFeature()
static inline int
_PyType_HasFeature(PyTypeObject *type, unsigned long feature) { … }

extern void _PyType_InitCache(PyInterpreterState *interp);

extern PyStatus _PyObject_InitState(PyInterpreterState *interp);
extern void _PyObject_FiniState(PyInterpreterState *interp);
extern bool _PyRefchain_IsTraced(PyInterpreterState *interp, PyObject *obj);

// Macros used for per-thread reference counting in the free threading build.
// They resolve to normal Py_INCREF/DECREF calls in the default build.
//
// The macros are used for only a few references that would otherwise cause
// scaling bottlenecks in the free threading build:
// - The reference from an object to `ob_type`.
// - The reference from a function to `func_code`.
// - The reference from a function to `func_globals` and `func_builtins`.
//
// It's safe, but not performant or necessary, to use these macros for other
// references to code, type, or dict objects. It's also safe to mix their
// usage with normal Py_INCREF/DECREF calls.
//
// See also Include/internal/pycore_dict.h for _Py_INCREF_DICT/_Py_DECREF_DICT.
#ifndef Py_GIL_DISABLED
#define _Py_INCREF_TYPE …
#define _Py_DECREF_TYPE …
#define _Py_INCREF_CODE …
#define _Py_DECREF_CODE …
#else
static inline void
_Py_THREAD_INCREF_OBJECT(PyObject *obj, Py_ssize_t unique_id)
{
    _PyThreadStateImpl *tstate = (_PyThreadStateImpl *)_PyThreadState_GET();

    // Unsigned comparison so that `unique_id=-1`, which indicates that
    // per-thread refcounting has been disabled on this object, is handled by
    // the "else".
    if ((size_t)unique_id < (size_t)tstate->refcounts.size) {
#  ifdef Py_REF_DEBUG
        _Py_INCREF_IncRefTotal();
#  endif
        _Py_INCREF_STAT_INC();
        tstate->refcounts.values[unique_id]++;
    }
    else {
        // The slow path resizes the per-thread refcount array if necessary.
        // It handles the unique_id=-1 case to keep the inlinable function smaller.
        _PyObject_ThreadIncrefSlow(obj, unique_id);
    }
}

static inline void
_Py_INCREF_TYPE(PyTypeObject *type)
{
    if (!_PyType_HasFeature(type, Py_TPFLAGS_HEAPTYPE)) {
        assert(_Py_IsImmortal(type));
        _Py_INCREF_IMMORTAL_STAT_INC();
        return;
    }

    // gh-122974: GCC 11 warns about the access to PyHeapTypeObject fields when
    // _Py_INCREF_TYPE() is called on a statically allocated type.  The
    // _PyType_HasFeature check above ensures that the type is a heap type.
#if defined(__GNUC__) && __GNUC__ >= 11
#  pragma GCC diagnostic push
#  pragma GCC diagnostic ignored "-Warray-bounds"
#endif
    _Py_THREAD_INCREF_OBJECT((PyObject *)type, ((PyHeapTypeObject *)type)->unique_id);
#if defined(__GNUC__) && __GNUC__ >= 11
#  pragma GCC diagnostic pop
#endif
}

static inline void
_Py_INCREF_CODE(PyCodeObject *co)
{
    _Py_THREAD_INCREF_OBJECT((PyObject *)co, co->_co_unique_id);
}

static inline void
_Py_THREAD_DECREF_OBJECT(PyObject *obj, Py_ssize_t unique_id)
{
    _PyThreadStateImpl *tstate = (_PyThreadStateImpl *)_PyThreadState_GET();

    // Unsigned comparison so that `unique_id=-1`, which indicates that
    // per-thread refcounting has been disabled on this object, is handled by
    // the "else".
    if ((size_t)unique_id < (size_t)tstate->refcounts.size) {
#  ifdef Py_REF_DEBUG
        _Py_DECREF_DecRefTotal();
#  endif
        _Py_DECREF_STAT_INC();
        tstate->refcounts.values[unique_id]--;
    }
    else {
        // Directly decref the object if the id is not assigned or if
        // per-thread refcounting has been disabled on this object.
        Py_DECREF(obj);
    }
}

static inline void
_Py_DECREF_TYPE(PyTypeObject *type)
{
    if (!_PyType_HasFeature(type, Py_TPFLAGS_HEAPTYPE)) {
        assert(_Py_IsImmortal(type));
        _Py_DECREF_IMMORTAL_STAT_INC();
        return;
    }
    PyHeapTypeObject *ht = (PyHeapTypeObject *)type;
    _Py_THREAD_DECREF_OBJECT((PyObject *)type, ht->unique_id);
}

static inline void
_Py_DECREF_CODE(PyCodeObject *co)
{
    _Py_THREAD_DECREF_OBJECT((PyObject *)co, co->_co_unique_id);
}
#endif

/* Inline functions trading binary compatibility for speed:
   _PyObject_Init() is the fast version of PyObject_Init(), and
   _PyObject_InitVar() is the fast version of PyObject_InitVar().

   These inline functions must not be called with op=NULL. */
static inline void
_PyObject_Init(PyObject *op, PyTypeObject *typeobj)
{ … }

static inline void
_PyObject_InitVar(PyVarObject *op, PyTypeObject *typeobj, Py_ssize_t size)
{ … }


/* Tell the GC to track this object.
 *
 * The object must not be tracked by the GC.
 *
 * NB: While the object is tracked by the collector, it must be safe to call the
 * ob_traverse method.
 *
 * Internal note: interp->gc.generation0->_gc_prev doesn't have any bit flags
 * because it's not object header.  So we don't use _PyGCHead_PREV() and
 * _PyGCHead_SET_PREV() for it to avoid unnecessary bitwise operations.
 *
 * See also the public PyObject_GC_Track() function.
 */
static inline void _PyObject_GC_TRACK(
// The preprocessor removes _PyObject_ASSERT_FROM() calls if NDEBUG is defined
#ifndef NDEBUG
    const char *filename, int lineno,
#endif
    PyObject *op)
{ … }

/* Tell the GC to stop tracking this object.
 *
 * Internal note: This may be called while GC. So _PyGC_PREV_MASK_COLLECTING
 * must be cleared. But _PyGC_PREV_MASK_FINALIZED bit is kept.
 *
 * The object must be tracked by the GC.
 *
 * See also the public PyObject_GC_UnTrack() which accept an object which is
 * not tracked.
 */
static inline void _PyObject_GC_UNTRACK(
// The preprocessor removes _PyObject_ASSERT_FROM() calls if NDEBUG is defined
#ifndef NDEBUG
    const char *filename, int lineno,
#endif
    PyObject *op)
{ … }

// Macros to accept any type for the parameter, and to automatically pass
// the filename and the filename (if NDEBUG is not defined) where the macro
// is called.
#ifdef NDEBUG
#define _PyObject_GC_TRACK(op) …
#define _PyObject_GC_UNTRACK(op) …
#else
#define _PyObject_GC_TRACK …
#define _PyObject_GC_UNTRACK …
#endif

#ifdef Py_GIL_DISABLED

/* Tries to increment an object's reference count
 *
 * This is a specialized version of _Py_TryIncref that only succeeds if the
 * object is immortal or local to this thread. It does not handle the case
 * where the  reference count modification requires an atomic operation. This
 * allows call sites to specialize for the immortal/local case.
 */
static inline int
_Py_TryIncrefFast(PyObject *op) {
    uint32_t local = _Py_atomic_load_uint32_relaxed(&op->ob_ref_local);
    local += 1;
    if (local == 0) {
        // immortal
        _Py_INCREF_IMMORTAL_STAT_INC();
        return 1;
    }
    if (_Py_IsOwnedByCurrentThread(op)) {
        _Py_INCREF_STAT_INC();
        _Py_atomic_store_uint32_relaxed(&op->ob_ref_local, local);
#ifdef Py_REF_DEBUG
        _Py_IncRefTotal(_PyThreadState_GET());
#endif
        return 1;
    }
    return 0;
}

static inline int
_Py_TryIncRefShared(PyObject *op)
{
    Py_ssize_t shared = _Py_atomic_load_ssize_relaxed(&op->ob_ref_shared);
    for (;;) {
        // If the shared refcount is zero and the object is either merged
        // or may not have weak references, then we cannot incref it.
        if (shared == 0 || shared == _Py_REF_MERGED) {
            return 0;
        }

        if (_Py_atomic_compare_exchange_ssize(
                &op->ob_ref_shared,
                &shared,
                shared + (1 << _Py_REF_SHARED_SHIFT))) {
#ifdef Py_REF_DEBUG
            _Py_IncRefTotal(_PyThreadState_GET());
#endif
            _Py_INCREF_STAT_INC();
            return 1;
        }
    }
}

/* Tries to incref the object op and ensures that *src still points to it. */
static inline int
_Py_TryIncrefCompare(PyObject **src, PyObject *op)
{
    if (_Py_TryIncrefFast(op)) {
        return 1;
    }
    if (!_Py_TryIncRefShared(op)) {
        return 0;
    }
    if (op != _Py_atomic_load_ptr(src)) {
        Py_DECREF(op);
        return 0;
    }
    return 1;
}

static inline int
_Py_TryIncrefCompareStackRef(PyObject **src, PyObject *op, _PyStackRef *out)
{
    if (_Py_IsImmortal(op) || _PyObject_HasDeferredRefcount(op)) {
        *out = (_PyStackRef){ .bits = (intptr_t)op | Py_TAG_DEFERRED };
        return 1;
    }
    if (_Py_TryIncrefCompare(src, op)) {
        *out = PyStackRef_FromPyObjectSteal(op);
        return 1;
    }
    return 0;
}

/* Loads and increfs an object from ptr, which may contain a NULL value.
   Safe with concurrent (atomic) updates to ptr.
   NOTE: The writer must set maybe-weakref on the stored object! */
static inline PyObject *
_Py_XGetRef(PyObject **ptr)
{
    for (;;) {
        PyObject *value = _Py_atomic_load_ptr(ptr);
        if (value == NULL) {
            return value;
        }
        if (_Py_TryIncrefCompare(ptr, value)) {
            return value;
        }
    }
}

/* Attempts to loads and increfs an object from ptr. Returns NULL
   on failure, which may be due to a NULL value or a concurrent update. */
static inline PyObject *
_Py_TryXGetRef(PyObject **ptr)
{
    PyObject *value = _Py_atomic_load_ptr(ptr);
    if (value == NULL) {
        return value;
    }
    if (_Py_TryIncrefCompare(ptr, value)) {
        return value;
    }
    return NULL;
}

/* Like Py_NewRef but also optimistically sets _Py_REF_MAYBE_WEAKREF
   on objects owned by a different thread. */
static inline PyObject *
_Py_NewRefWithLock(PyObject *op)
{
    if (_Py_TryIncrefFast(op)) {
        return op;
    }
#ifdef Py_REF_DEBUG
    _Py_IncRefTotal(_PyThreadState_GET());
#endif
    _Py_INCREF_STAT_INC();
    for (;;) {
        Py_ssize_t shared = _Py_atomic_load_ssize_relaxed(&op->ob_ref_shared);
        Py_ssize_t new_shared = shared + (1 << _Py_REF_SHARED_SHIFT);
        if ((shared & _Py_REF_SHARED_FLAG_MASK) == 0) {
            new_shared |= _Py_REF_MAYBE_WEAKREF;
        }
        if (_Py_atomic_compare_exchange_ssize(
                &op->ob_ref_shared,
                &shared,
                new_shared)) {
            return op;
        }
    }
}

static inline PyObject *
_Py_XNewRefWithLock(PyObject *obj)
{
    if (obj == NULL) {
        return NULL;
    }
    return _Py_NewRefWithLock(obj);
}

static inline void
_PyObject_SetMaybeWeakref(PyObject *op)
{
    if (_Py_IsImmortal(op)) {
        return;
    }
    for (;;) {
        Py_ssize_t shared = _Py_atomic_load_ssize_relaxed(&op->ob_ref_shared);
        if ((shared & _Py_REF_SHARED_FLAG_MASK) != 0) {
            // Nothing to do if it's in WEAKREFS, QUEUED, or MERGED states.
            return;
        }
        if (_Py_atomic_compare_exchange_ssize(
                &op->ob_ref_shared, &shared, shared | _Py_REF_MAYBE_WEAKREF)) {
            return;
        }
    }
}

#endif

/* Tries to incref op and returns 1 if successful or 0 otherwise. */
static inline int
_Py_TryIncref(PyObject *op)
{ … }

#ifdef Py_REF_DEBUG
extern void _PyInterpreterState_FinalizeRefTotal(PyInterpreterState *);
extern void _Py_FinalizeRefTotal(_PyRuntimeState *);
extern void _PyDebug_PrintTotalRefs(void);
#endif

#ifdef Py_TRACE_REFS
extern void _Py_AddToAllObjects(PyObject *op);
extern void _Py_PrintReferences(PyInterpreterState *, FILE *);
extern void _Py_PrintReferenceAddresses(PyInterpreterState *, FILE *);
#endif


/* Return the *address* of the object's weaklist.  The address may be
 * dereferenced to get the current head of the weaklist.  This is useful
 * for iterating over the linked list of weakrefs, especially when the
 * list is being modified externally (e.g. refs getting removed).
 *
 * The returned pointer should not be used to change the head of the list
 * nor should it be used to add, remove, or swap any refs in the list.
 * That is the sole responsibility of the code in weakrefobject.c.
 */
static inline PyObject **
_PyObject_GET_WEAKREFS_LISTPTR(PyObject *op)
{ … }

/* This is a special case of _PyObject_GET_WEAKREFS_LISTPTR().
 * Only the most fundamental lookup path is used.
 * Consequently, static types should not be used.
 *
 * For static builtin types the returned pointer will always point
 * to a NULL tp_weaklist.  This is fine for any deallocation cases,
 * since static types are never deallocated and static builtin types
 * are only finalized at the end of runtime finalization.
 *
 * If the weaklist for static types is actually needed then use
 * _PyObject_GET_WEAKREFS_LISTPTR().
 */
static inline PyWeakReference **
_PyObject_GET_WEAKREFS_LISTPTR_FROM_OFFSET(PyObject *op)
{ … }

// Fast inlined version of PyType_IS_GC()
#define _PyType_IS_GC(t) …

// Fast inlined version of PyObject_IS_GC()
static inline int
_PyObject_IS_GC(PyObject *obj)
{ … }

// Fast inlined version of PyObject_Hash()
static inline Py_hash_t
_PyObject_HashFast(PyObject *op)
{ … }

static inline size_t
_PyType_PreHeaderSize(PyTypeObject *tp)
{ … }

void _PyObject_GC_Link(PyObject *op);

// Usage: assert(_Py_CheckSlotResult(obj, "__getitem__", result != NULL));
extern int _Py_CheckSlotResult(
    PyObject *obj,
    const char *slot_name,
    int success);

// Test if a type supports weak references
static inline int _PyType_SUPPORTS_WEAKREFS(PyTypeObject *type) { … }

extern PyObject* _PyType_AllocNoTrack(PyTypeObject *type, Py_ssize_t nitems);
PyAPI_FUNC(PyObject *) _PyType_NewManagedObject(PyTypeObject *type);

extern PyTypeObject* _PyType_CalculateMetaclass(PyTypeObject *, PyObject *);
extern PyObject* _PyType_GetDocFromInternalDoc(const char *, const char *);
extern PyObject* _PyType_GetTextSignatureFromInternalDoc(const char *, const char *, int);
extern int _PyObject_SetAttributeErrorContext(PyObject *v, PyObject* name);

void _PyObject_InitInlineValues(PyObject *obj, PyTypeObject *tp);
extern int _PyObject_StoreInstanceAttribute(PyObject *obj,
                                            PyObject *name, PyObject *value);
extern bool _PyObject_TryGetInstanceAttribute(PyObject *obj, PyObject *name,
                                              PyObject **attr);

#ifdef Py_GIL_DISABLED
#define MANAGED_DICT_OFFSET …
#define MANAGED_WEAKREF_OFFSET …
#else
#define MANAGED_DICT_OFFSET …
#define MANAGED_WEAKREF_OFFSET …
#endif

PyManagedDictPointer;

static inline PyManagedDictPointer *
_PyObject_ManagedDictPointer(PyObject *obj)
{ … }

static inline PyDictObject *
_PyObject_GetManagedDict(PyObject *obj)
{ … }

static inline PyDictValues *
_PyObject_InlineValues(PyObject *obj)
{ … }

extern PyObject ** _PyObject_ComputedDictPointer(PyObject *);
extern int _PyObject_IsInstanceDictEmpty(PyObject *);

// Export for 'math' shared extension
PyAPI_FUNC(PyObject*) _PyObject_LookupSpecial(PyObject *, PyObject *);
PyAPI_FUNC(PyObject*) _PyObject_LookupSpecialMethod(PyObject *self, PyObject *attr, PyObject **self_or_null);

extern int _PyObject_IsAbstract(PyObject *);

PyAPI_FUNC(int) _PyObject_GetMethod(PyObject *obj, PyObject *name, PyObject **method);
extern PyObject* _PyObject_NextNotImplemented(PyObject *);

// Pickle support.
// Export for '_datetime' shared extension
PyAPI_FUNC(PyObject*) _PyObject_GetState(PyObject *);

/* C function call trampolines to mitigate bad function pointer casts.
 *
 * Typical native ABIs ignore additional arguments or fill in missing
 * values with 0/NULL in function pointer cast. Compilers do not show
 * warnings when a function pointer is explicitly casted to an
 * incompatible type.
 *
 * Bad fpcasts are an issue in WebAssembly. WASM's indirect_call has strict
 * function signature checks. Argument count, types, and return type must
 * match.
 *
 * Third party code unintentionally rely on problematic fpcasts. The call
 * trampoline mitigates common occurrences of bad fpcasts on Emscripten.
 */
#if !(defined(__EMSCRIPTEN__) && defined(PY_CALL_TRAMPOLINE))
#define _PyCFunction_TrampolineCall(meth, self, args) …
#define _PyCFunctionWithKeywords_TrampolineCall(meth, self, args, kw) …
#endif // __EMSCRIPTEN__ && PY_CALL_TRAMPOLINE

// Export these 2 symbols for '_pickle' shared extension
PyAPI_DATA(PyTypeObject) _PyNone_Type;
PyAPI_DATA(PyTypeObject) _PyNotImplemented_Type;

// Maps Py_LT to Py_GT, ..., Py_GE to Py_LE.
// Export for the stable ABI.
PyAPI_DATA(int) _Py_SwappedOp[];

extern void _Py_GetConstant_Init(void);

enum _PyAnnotateFormat { … };

#ifdef __cplusplus
}
#endif
#endif /* !Py_INTERNAL_OBJECT_H */