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49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
#ifndef Py_CPYTHON_WEAKREFOBJECT_H
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# error "this header file must not be included directly"
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#endif
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/* PyWeakReference is the base struct for the Python ReferenceType, ProxyType,
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* and CallableProxyType.
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*/
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struct _PyWeakReference {
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PyObject_HEAD
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/* The object to which this is a weak reference, or Py_None if none.
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* Note that this is a stealth reference: wr_object's refcount is
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* not incremented to reflect this pointer.
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*/
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PyObject *wr_object;
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/* A callable to invoke when wr_object dies, or NULL if none. */
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PyObject *wr_callback;
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/* A cache for wr_object's hash code. As usual for hashes, this is -1
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* if the hash code isn't known yet.
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*/
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Py_hash_t hash;
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/* If wr_object is weakly referenced, wr_object has a doubly-linked NULL-
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* terminated list of weak references to it. These are the list pointers.
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* If wr_object goes away, wr_object is set to Py_None, and these pointers
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* have no meaning then.
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*/
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PyWeakReference *wr_prev;
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PyWeakReference *wr_next;
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vectorcallfunc vectorcall;
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#ifdef Py_GIL_DISABLED
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/* Pointer to the lock used when clearing in free-threaded builds.
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* Normally this can be derived from wr_object, but in some cases we need
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* to lock after wr_object has been set to Py_None.
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*/
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PyMutex *weakrefs_lock;
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#endif
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};
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PyAPI_FUNC(void) _PyWeakref_ClearRef(PyWeakReference *self);
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#define _PyWeakref_CAST(op) \
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(assert(PyWeakref_Check(op)), _Py_CAST(PyWeakReference*, (op)))
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// Test if a weak reference is dead.
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PyAPI_FUNC(int) PyWeakref_IsDead(PyObject *ref);
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