121 lines
3.9 KiB
C
121 lines
3.9 KiB
C
#ifndef Py_INTERNAL_OBJECT_H
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#define Py_INTERNAL_OBJECT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef Py_BUILD_CORE
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# error "this header requires Py_BUILD_CORE define"
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#endif
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#include "pycore_gc.h" // _PyObject_GC_IS_TRACKED()
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#include "pycore_interp.h" // PyInterpreterState.gc
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#include "pycore_pystate.h" // _PyThreadState_GET()
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PyAPI_FUNC(int) _PyType_CheckConsistency(PyTypeObject *type);
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PyAPI_FUNC(int) _PyDict_CheckConsistency(PyObject *mp, int check_content);
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/* Tell the GC to track this object.
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*
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* NB: While the object is tracked by the collector, it must be safe to call the
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* ob_traverse method.
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*
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* Internal note: interp->gc.generation0->_gc_prev doesn't have any bit flags
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* because it's not object header. So we don't use _PyGCHead_PREV() and
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* _PyGCHead_SET_PREV() for it to avoid unnecessary bitwise operations.
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*
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* The PyObject_GC_Track() function is the public version of this macro.
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*/
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static inline void _PyObject_GC_TRACK_impl(const char *filename, int lineno,
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PyObject *op)
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{
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_PyObject_ASSERT_FROM(op, !_PyObject_GC_IS_TRACKED(op),
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"object already tracked by the garbage collector",
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filename, lineno, "_PyObject_GC_TRACK");
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PyGC_Head *gc = _Py_AS_GC(op);
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_PyObject_ASSERT_FROM(op,
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(gc->_gc_prev & _PyGC_PREV_MASK_COLLECTING) == 0,
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"object is in generation which is garbage collected",
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filename, lineno, "_PyObject_GC_TRACK");
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PyThreadState *tstate = _PyThreadState_GET();
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PyGC_Head *generation0 = tstate->interp->gc.generation0;
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PyGC_Head *last = (PyGC_Head*)(generation0->_gc_prev);
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_PyGCHead_SET_NEXT(last, gc);
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_PyGCHead_SET_PREV(gc, last);
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_PyGCHead_SET_NEXT(gc, generation0);
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generation0->_gc_prev = (uintptr_t)gc;
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}
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#define _PyObject_GC_TRACK(op) \
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_PyObject_GC_TRACK_impl(__FILE__, __LINE__, _PyObject_CAST(op))
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/* Tell the GC to stop tracking this object.
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*
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* Internal note: This may be called while GC. So _PyGC_PREV_MASK_COLLECTING
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* must be cleared. But _PyGC_PREV_MASK_FINALIZED bit is kept.
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*
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* The object must be tracked by the GC.
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*
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* The PyObject_GC_UnTrack() function is the public version of this macro.
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*/
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static inline void _PyObject_GC_UNTRACK_impl(const char *filename, int lineno,
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PyObject *op)
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{
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_PyObject_ASSERT_FROM(op, _PyObject_GC_IS_TRACKED(op),
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"object not tracked by the garbage collector",
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filename, lineno, "_PyObject_GC_UNTRACK");
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PyGC_Head *gc = _Py_AS_GC(op);
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PyGC_Head *prev = _PyGCHead_PREV(gc);
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PyGC_Head *next = _PyGCHead_NEXT(gc);
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_PyGCHead_SET_NEXT(prev, next);
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_PyGCHead_SET_PREV(next, prev);
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gc->_gc_next = 0;
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gc->_gc_prev &= _PyGC_PREV_MASK_FINALIZED;
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}
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#define _PyObject_GC_UNTRACK(op) \
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_PyObject_GC_UNTRACK_impl(__FILE__, __LINE__, _PyObject_CAST(op))
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#ifdef Py_REF_DEBUG
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extern void _PyDebug_PrintTotalRefs(void);
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#endif
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#ifdef Py_TRACE_REFS
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extern void _Py_AddToAllObjects(PyObject *op, int force);
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extern void _Py_PrintReferences(FILE *);
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extern void _Py_PrintReferenceAddresses(FILE *);
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#endif
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static inline PyObject **
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_PyObject_GET_WEAKREFS_LISTPTR(PyObject *op)
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{
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Py_ssize_t offset = Py_TYPE(op)->tp_weaklistoffset;
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return (PyObject **)((char *)op + offset);
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}
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// Fast inlined version of PyType_HasFeature()
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static inline int
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_PyType_HasFeature(PyTypeObject *type, unsigned long feature) {
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return ((type->tp_flags & feature) != 0);
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}
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// Fast inlined version of PyObject_IS_GC()
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static inline int
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_PyObject_IS_GC(PyObject *obj)
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{
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return (PyType_IS_GC(Py_TYPE(obj))
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&& (Py_TYPE(obj)->tp_is_gc == NULL
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|| Py_TYPE(obj)->tp_is_gc(obj)));
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}
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// Fast inlined version of PyType_IS_GC()
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#define _PyType_IS_GC(t) _PyType_HasFeature((t), Py_TPFLAGS_HAVE_GC)
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_INTERNAL_OBJECT_H */
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