PyWeakReference

PyWeakReference is the base struct for the Python ReferenceType, ProxyType, and CallableProxyType.

subclass of PyObject

extern (C)

struct PyWeakReference {

C_long hash;

}

Members

hash Py_hash_t hash;: A cache for wr_object's hash code. As usual for hashes, this is -1 if the hash code isn't known yet.
wr_callback PyObject* wr_callback;: A callable to invoke when wr_object dies, or NULL if none.
wr_next PyWeakReference* wr_next;: 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.
wr_object PyObject* wr_object;: 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.
wr_prev PyWeakReference* wr_prev;: 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.