| #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 "pycore_gc.h" // _PyObject_GC_IS_TRACKED() |
| #include "pycore_interp.h" // PyInterpreterState.gc |
| #include "pycore_pystate.h" // _PyThreadState_GET() |
| |
| PyAPI_FUNC(int) _PyType_CheckConsistency(PyTypeObject *type); |
| PyAPI_FUNC(int) _PyDict_CheckConsistency(PyObject *mp, int check_content); |
| |
| /* Tell the GC to track this object. |
| * |
| * 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. |
| * |
| * The PyObject_GC_Track() function is the public version of this macro. |
| */ |
| static inline void _PyObject_GC_TRACK_impl(const char *filename, int lineno, |
| PyObject *op) |
| { |
| _PyObject_ASSERT_FROM(op, !_PyObject_GC_IS_TRACKED(op), |
| "object already tracked by the garbage collector", |
| filename, lineno, "_PyObject_GC_TRACK"); |
| |
| PyGC_Head *gc = _Py_AS_GC(op); |
| _PyObject_ASSERT_FROM(op, |
| (gc->_gc_prev & _PyGC_PREV_MASK_COLLECTING) == 0, |
| "object is in generation which is garbage collected", |
| filename, lineno, "_PyObject_GC_TRACK"); |
| |
| PyThreadState *tstate = _PyThreadState_GET(); |
| PyGC_Head *generation0 = tstate->interp->gc.generation0; |
| PyGC_Head *last = (PyGC_Head*)(generation0->_gc_prev); |
| _PyGCHead_SET_NEXT(last, gc); |
| _PyGCHead_SET_PREV(gc, last); |
| _PyGCHead_SET_NEXT(gc, generation0); |
| generation0->_gc_prev = (uintptr_t)gc; |
| } |
| |
| #define _PyObject_GC_TRACK(op) \ |
| _PyObject_GC_TRACK_impl(__FILE__, __LINE__, _PyObject_CAST(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. |
| * |
| * The PyObject_GC_UnTrack() function is the public version of this macro. |
| */ |
| static inline void _PyObject_GC_UNTRACK_impl(const char *filename, int lineno, |
| PyObject *op) |
| { |
| _PyObject_ASSERT_FROM(op, _PyObject_GC_IS_TRACKED(op), |
| "object not tracked by the garbage collector", |
| filename, lineno, "_PyObject_GC_UNTRACK"); |
| |
| PyGC_Head *gc = _Py_AS_GC(op); |
| PyGC_Head *prev = _PyGCHead_PREV(gc); |
| PyGC_Head *next = _PyGCHead_NEXT(gc); |
| _PyGCHead_SET_NEXT(prev, next); |
| _PyGCHead_SET_PREV(next, prev); |
| gc->_gc_next = 0; |
| gc->_gc_prev &= _PyGC_PREV_MASK_FINALIZED; |
| } |
| |
| #define _PyObject_GC_UNTRACK(op) \ |
| _PyObject_GC_UNTRACK_impl(__FILE__, __LINE__, _PyObject_CAST(op)) |
| |
| #ifdef Py_REF_DEBUG |
| extern void _PyDebug_PrintTotalRefs(void); |
| #endif |
| |
| #ifdef Py_TRACE_REFS |
| extern void _Py_AddToAllObjects(PyObject *op, int force); |
| extern void _Py_PrintReferences(FILE *); |
| extern void _Py_PrintReferenceAddresses(FILE *); |
| #endif |
| |
| static inline PyObject ** |
| _PyObject_GET_WEAKREFS_LISTPTR(PyObject *op) |
| { |
| Py_ssize_t offset = Py_TYPE(op)->tp_weaklistoffset; |
| return (PyObject **)((char *)op + offset); |
| } |
| |
| // Fast inlined version of PyType_HasFeature() |
| static inline int |
| _PyType_HasFeature(PyTypeObject *type, unsigned long feature) { |
| return ((type->tp_flags & feature) != 0); |
| } |
| |
| // Fast inlined version of PyObject_IS_GC() |
| static inline int |
| _PyObject_IS_GC(PyObject *obj) |
| { |
| return (PyType_IS_GC(Py_TYPE(obj)) |
| && (Py_TYPE(obj)->tp_is_gc == NULL |
| || Py_TYPE(obj)->tp_is_gc(obj))); |
| } |
| |
| // Fast inlined version of PyType_IS_GC() |
| #define _PyType_IS_GC(t) _PyType_HasFeature((t), Py_TPFLAGS_HAVE_GC) |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| #endif /* !Py_INTERNAL_OBJECT_H */ |