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#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_pystate.h" /* _PyRuntime */ 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: _PyRuntime.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"); PyGC_Head *last = (PyGC_Head*)(_PyRuntime.gc.generation0->_gc_prev); _PyGCHead_SET_NEXT(last, gc); _PyGCHead_SET_PREV(gc, last); _PyGCHead_SET_NEXT(gc, _PyRuntime.gc.generation0); _PyRuntime.gc.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 __cplusplus } #endif #endif /* !Py_INTERNAL_OBJECT_H */
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