diff options
Diffstat (limited to 'Include/weakrefobject.h')
| -rw-r--r-- | Include/weakrefobject.h | 56 |
1 files changed, 6 insertions, 50 deletions
diff --git a/Include/weakrefobject.h b/Include/weakrefobject.h index ac4b4821c8..f071e9c759 100644 --- a/Include/weakrefobject.h +++ b/Include/weakrefobject.h @@ -6,40 +6,8 @@ extern "C" { #endif - typedef struct _PyWeakReference PyWeakReference; -/* PyWeakReference is the base struct for the Python ReferenceType, ProxyType, - * and CallableProxyType. - */ -#ifndef Py_LIMITED_API -struct _PyWeakReference { - PyObject_HEAD - - /* The object to which this is a weak reference, or Py_None if none. - * Note that this is a stealth reference: wr_object's refcount is - * not incremented to reflect this pointer. - */ - PyObject *wr_object; - - /* A callable to invoke when wr_object dies, or NULL if none. */ - PyObject *wr_callback; - - /* A cache for wr_object's hash code. As usual for hashes, this is -1 - * if the hash code isn't known yet. - */ - Py_hash_t hash; - - /* If wr_object is weakly referenced, wr_object has a doubly-linked NULL- - * terminated list of weak references to it. These are the list pointers. - * If wr_object goes away, wr_object is set to Py_None, and these pointers - * have no meaning then. - */ - PyWeakReference *wr_prev; - PyWeakReference *wr_next; -}; -#endif - PyAPI_DATA(PyTypeObject) _PyWeakref_RefType; PyAPI_DATA(PyTypeObject) _PyWeakref_ProxyType; PyAPI_DATA(PyTypeObject) _PyWeakref_CallableProxyType; @@ -56,30 +24,18 @@ PyAPI_DATA(PyTypeObject) _PyWeakref_CallableProxyType; PyAPI_FUNC(PyObject *) PyWeakref_NewRef(PyObject *ob, - PyObject *callback); + PyObject *callback); PyAPI_FUNC(PyObject *) PyWeakref_NewProxy(PyObject *ob, - PyObject *callback); + PyObject *callback); PyAPI_FUNC(PyObject *) PyWeakref_GetObject(PyObject *ref); -#ifndef Py_LIMITED_API -PyAPI_FUNC(Py_ssize_t) _PyWeakref_GetWeakrefCount(PyWeakReference *head); -PyAPI_FUNC(void) _PyWeakref_ClearRef(PyWeakReference *self); +#ifndef Py_LIMITED_API +# define Py_CPYTHON_WEAKREFOBJECT_H +# include "cpython/weakrefobject.h" +# undef Py_CPYTHON_WEAKREFOBJECT_H #endif -/* Explanation for the Py_REFCNT() check: when a weakref's target is part - of a long chain of deallocations which triggers the trashcan mechanism, - clearing the weakrefs can be delayed long after the target's refcount - has dropped to zero. In the meantime, code accessing the weakref will - be able to "see" the target object even though it is supposed to be - unreachable. See issue #16602. */ - -#define PyWeakref_GET_OBJECT(ref) \ - (Py_REFCNT(((PyWeakReference *)(ref))->wr_object) > 0 \ - ? ((PyWeakReference *)(ref))->wr_object \ - : Py_None) - - #ifdef __cplusplus } #endif |