mirror of
https://github.com/python/cpython.git
synced 2024-12-15 04:44:47 +08:00
83 lines
2.9 KiB
C
83 lines
2.9 KiB
C
#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) _PyUnicode_CheckConsistency(PyObject *op, int check_content);
|
|
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 */
|