public static object MakeNew(PythonType cls, object @object)
{
IWeakReferenceable iwr = @object as IWeakReferenceable;
if (iwr == null)
{
throw Ops.TypeError("cannot create weak reference to '{0}' object", Ops.GetDynamicType(@object).__name__);
}
if (cls == Ops.GetDynamicTypeFromType(typeof(PythonWeakReference)))
{
WeakRefTracker wrt = iwr.GetWeakRef();
if (wrt != null)
{
for (int i = 0; i < wrt.HandlerCount; i++)
{
if (wrt.GetHandlerCallback(i) == null && wrt.GetWeakRef(i) is PythonWeakReference)
{
return(wrt.GetWeakRef(i));
}
}
}
return(new PythonWeakReference(@object));
}
else
{
return(cls.ctor.Call(cls, @object));
}
}
public static object __new__(CodeContext context, PythonType cls, object @object)
{
IWeakReferenceable iwr = ConvertToWeakReferenceable(context.LanguageContext, @object);
if (cls == DynamicHelpers.GetPythonTypeFromType(typeof(@ref)))
{
WeakRefTracker wrt = iwr.GetWeakRef();
if (wrt != null)
{
for (int i = 0; i < wrt.HandlerCount; i++)
{
if (wrt.GetHandlerCallback(i) == null && wrt.GetWeakRef(i) is @ref)
{
return(wrt.GetWeakRef(i));
}
}
}
return(new @ref(context, @object));
}
else
{
return(cls.CreateInstance(context, @object));
}
}
internal static object MakeNew(object @object, object callback)
{
IWeakReferenceable iwr = @object as IWeakReferenceable;
if (iwr == null)
{
throw Ops.TypeError("cannot create weak reference to '{0}' object", Ops.GetDynamicType(@object).__name__);
}
if (callback == null)
{
WeakRefTracker wrt = iwr.GetWeakRef();
if (wrt != null)
{
for (int i = 0; i < wrt.HandlerCount; i++)
{
if (wrt.GetHandlerCallback(i) == null &&
wrt.GetWeakRef(i) is PythonCallableWeakRefProxy)
{
return(wrt.GetWeakRef(i));
}
}
}
}
return(new PythonCallableWeakRefProxy(@object, callback));
}
internal override bool TryGetValue(CodeContext context, object instance, PythonType owner, out object value)
{
if (instance == null)
{
value = this;
return(true);
}
IWeakReferenceable reference = instance as IWeakReferenceable;
if (reference != null)
{
WeakRefTracker tracker = reference.GetWeakRef();
if (tracker == null || tracker.HandlerCount == 0)
{
value = null;
}
else
{
value = tracker.GetHandlerCallback(0);
}
return(true);
}
value = null;
return(false);
}
internal override bool TrySetValue(CodeContext context, object instance, PythonType owner, object value)
{
IWeakReferenceable reference = instance as IWeakReferenceable;
if (reference != null)
{
return(reference.SetWeakRef(new WeakRefTracker(value, instance)));
}
return(false);
}
internal static IWeakReferenceable ConvertToWeakReferenceable(object obj)
{
IWeakReferenceable iwr = obj as IWeakReferenceable;
if (iwr != null)
{
return(iwr);
}
throw PythonOps.TypeError("cannot create weak reference to '{0}' object", PythonOps.GetPythonTypeName(obj));
}
private static void AddFinalizer(CodeContext /*!*/ context, PythonType dt, object newObject)
{
// check if object has finalizer...
if (dt.TryResolveSlot(context, "__del__", out _))
{
IWeakReferenceable iwr = context.LanguageContext.ConvertToWeakReferenceable(newObject);
Debug.Assert(iwr != null);
InstanceFinalizer nif = new InstanceFinalizer(context, newObject);
iwr.SetFinalizer(new WeakRefTracker(iwr, nif, nif));
}
}
internal static int GetWeakRefCount(object o)
{
IWeakReferenceable iwr = o as IWeakReferenceable;
if (iwr != null)
{
WeakRefTracker wrt = iwr.GetWeakRef();
if (wrt != null)
{
return(wrt.HandlerCount);
}
}
return(0);
}
public static WeakRefTracker InitializeWeakRef(PythonContext context, object self, object target, object callback)
{
IWeakReferenceable iwr = ConvertToWeakReferenceable(context, target);
WeakRefTracker wrt = iwr.GetWeakRef();
if (wrt == null)
{
if (!iwr.SetWeakRef(wrt = new WeakRefTracker(iwr)))
{
throw PythonOps.TypeError("cannot create weak reference to '{0}' object", PythonOps.GetPythonTypeName(target));
}
}
wrt.ChainCallback(callback, self);
return(wrt);
}
internal static List GetWeakRefs(object o)
{
List l = new List();
IWeakReferenceable iwr = o as IWeakReferenceable;
if (iwr != null)
{
WeakRefTracker wrt = iwr.GetWeakRef();
if (wrt != null)
{
for (int i = 0; i < wrt.HandlerCount; i++)
{
l.AddNoLock(wrt.GetWeakRef(i));
}
}
}
return(l);
}
public static void InitializeWeakRef(object self, object target, object callback)
{
IWeakReferenceable iwr = target as IWeakReferenceable;
if (iwr == null)
{
throw Ops.TypeError("cannot create weak reference to '{0}' object", Ops.GetDynamicType(target).__name__);
}
WeakRefTracker wrt = iwr.GetWeakRef();
if (wrt == null)
{
iwr.SetWeakRef(new WeakRefTracker(callback, self));
}
else
{
wrt.ChainCallback(callback, self);
}
}
internal static object MakeNew(CodeContext /*!*/ context, object @object, object callback)
{
IWeakReferenceable iwr = ConvertToWeakReferenceable(context.LanguageContext, @object);
if (callback == null)
{
WeakRefTracker wrt = iwr.GetWeakRef();
if (wrt != null)
{
for (int i = 0; i < wrt.HandlerCount; i++)
{
if (wrt.GetHandlerCallback(i) == null && wrt.GetWeakRef(i) is weakproxy)
{
return(wrt.GetWeakRef(i));
}
}
}
}
return(new weakproxy(context, @object, callback));
}
public WeakRefTracker(IWeakReferenceable target, object callback, object weakRef) : this(target) {
ChainCallback(callback, weakRef);
}
public WeakRefTracker(IWeakReferenceable target)
{
_targetId = IdDispenser.GetId(target);
}
public WeakRefTracker(IWeakReferenceable target)
{
}
