cpython@bcda8f1 (original) (raw)

`@@ -323,51 +323,6 @@ typedef struct {

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` _PyGCHead_SET_FINALIZED(_Py_AS_GC(o))

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`#endif /* !defined(Py_LIMITED_API) */

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-

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#if defined(Py_BUILD_CORE) || defined(Py_BUILD_CORE_BUILTIN)

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/* Tell the GC to track this object.

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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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Internal note: _PyRuntime.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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The PyObject_GC_Track() function is the public version of this macro.

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#define _PyObject_GC_TRACK(o) do { \

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PyGC_Head *g = _Py_AS_GC(o); \

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if (g->_gc_next != 0) { \

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Py_FatalError("GC object already tracked"); \

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} \

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assert((g->_gc_prev & _PyGC_PREV_MASK_COLLECTING) == 0); \

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PyGC_Head last = (PyGC_Head)(_PyRuntime.gc.generation0->_gc_prev); \

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_PyGCHead_SET_NEXT(last, g); \

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_PyGCHead_SET_PREV(g, last); \

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_PyGCHead_SET_NEXT(g, _PyRuntime.gc.generation0); \

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_PyRuntime.gc.generation0->_gc_prev = (uintptr_t)g; \

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} while (0);

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-

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/* Tell the GC to stop tracking this object.

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Internal note: This may be called while GC. So _PyGC_PREV_MASK_COLLECTING must

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be cleared. But _PyGC_PREV_MASK_FINALIZED bit is kept.

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The PyObject_GC_UnTrack() function is the public version of this macro.

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#define _PyObject_GC_UNTRACK(o) do { \

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PyGC_Head *g = _Py_AS_GC(o); \

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PyGC_Head *prev = _PyGCHead_PREV(g); \

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PyGC_Head *next = _PyGCHead_NEXT(g); \

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assert(next != NULL); \

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_PyGCHead_SET_NEXT(prev, next); \

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_PyGCHead_SET_PREV(next, prev); \

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g->_gc_next = 0; \

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g->_gc_prev &= _PyGC_PREV_MASK_FINALIZED; \

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} while (0);

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#endif /* defined(Py_BUILD_CORE) || defined(Py_BUILD_CORE_BUILTIN) */

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-

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`#ifndef Py_LIMITED_API

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`PyAPI_FUNC(PyObject *) _PyObject_GC_Malloc(size_t size);

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`PyAPI_FUNC(PyObject *) _PyObject_GC_Calloc(size_t size);