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79 lines
2.4 KiB
79 lines
2.4 KiB
/* |
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* Copyright 2019 by its authors. See AUTHORS. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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using System; |
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using EventDictionary = System.Collections.Generic.Dictionary<(System.IntPtr desc, object evtDelegate), (System.IntPtr evtCallerPtr, Efl.EventCb evtCaller)>; |
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namespace Efl |
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{ |
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namespace Eo |
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{ |
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/// <summary>Observe the ownership state of an Eo wrapper and control its life-cycle.</summary> |
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public class WrapperSupervisor |
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{ |
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private System.WeakReference weakRef; |
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#pragma warning disable CS0414 |
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private Efl.Eo.IWrapper sharedRef; |
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#pragma warning restore CS0414 |
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private EventDictionary eoEvents; |
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/// <summary>Create a new supervisor for the given.</summary> |
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/// <param name="obj">Efl object to be supervised.</param> |
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public WrapperSupervisor(Efl.Eo.IWrapper obj) |
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{ |
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weakRef = new WeakReference(obj); |
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sharedRef = null; |
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eoEvents = new EventDictionary(); |
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} |
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/// <summary>Efl object being supervised.</summary> |
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public Efl.Eo.IWrapper Target |
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{ |
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get |
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{ |
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return (Efl.Eo.IWrapper) weakRef.Target; |
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} |
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} |
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/// <summary>Dictionary that holds the events related with the supervised object.</summary> |
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public EventDictionary EoEvents |
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{ |
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get |
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{ |
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return eoEvents; |
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} |
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} |
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/// <summary>To be called when the object is uniquely owned by C#, removing its strong reference and making it available to garbage collection.</summary> |
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public void MakeUnique() |
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{ |
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sharedRef = null; |
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} |
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/// <summary>To be called when the object is owned in the native library too, adding a strong reference to it and making it unavailable for garbage collection.</summary> |
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public void MakeShared() |
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{ |
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if (this.Target == null) |
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throw new InvalidOperationException("Tried to make a null reference shared."); |
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sharedRef = this.Target; |
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} |
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} |
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} |
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} |
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