// --------------------------------------------------------------------------------------------------------------------
/// <summary>
/// Converts the strong reference tag into a weak one and also returns it (to prevent garbage collection, the returned reference must be used/stored).
/// This method is called within '_ObjectInfo' to make the original structure a weak reference to allow garbage collection when the other handle copies are no longer in use.
/// <para>If called more than once, the subsequent calls will return null, which means the reference tag was already made weak.</para>
/// </summary>
internal _ReferenceTag _MakeWeak()
{
if (!(_RefTag is _WeakReferenceTag))
{
var currentTag = _RefTag;
_RefTag = new _WeakReferenceTag(_RefTag);
return(currentTag);
}
return(null);
}
// --------------------------------------------------------------------------------------------------------------------
/// <summary>
/// Creates a copy of this handle with a strong reference tag to keep track of it.
/// </summary>
internal _Handle Clone()
{
_ReferenceTag refTag = null;
if (_RefTag is _WeakReferenceTag)
{
((_WeakReferenceTag)_RefTag).WeakRefTag.TryGetTarget(out refTag);
}
else
{
refTag = _RefTag;
}
return(new _Handle(_HandleProxy, refTag));
}
// --------------------------------------------------------------------------------------------------------------------
public _Handle(HandleProxy *handleProxy, _ReferenceTag refTag = null)
{
_HandleProxy = handleProxy;
_RefTag = refTag ?? new _ReferenceTag();
}
public _WeakReferenceTag(_ReferenceTag refTag)
{
WeakRefTag = new WeakReference <_ReferenceTag>(refTag);
}
