summaryrefslogtreecommitdiff
path: root/src/bindings/mono/eo_mono/WrapperSupervisor.cs
blob: 21ef05268f2a3613d1bed8faa05e6ae3d6a26db1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
using System;
using EventDictionary = System.Collections.Generic.Dictionary<(System.IntPtr desc, object evtDelegate), (System.IntPtr evtCallerPtr, Efl.EventCb evtCaller)>;

namespace Efl
{

namespace Eo
{

/// <summary>Observe the ownership state  of an Eo wrapper and control its life-cycle.</summary>
public class WrapperSupervisor
{
    private System.WeakReference weakRef;
#pragma warning disable CS0414
    private Efl.Eo.IWrapper sharedRef;
#pragma warning restore CS0414
    private EventDictionary eoEvents;

    /// <summary>Create a new supervisor for the given.</summary>
    /// <param name="obj">Efl object to be supervised.</param>
    public WrapperSupervisor(Efl.Eo.IWrapper obj)
    {
        weakRef = new WeakReference(obj);
        sharedRef = null;
        eoEvents = new EventDictionary();
    }

    /// <summary>Efl object being supervised.</summary>
    public Efl.Eo.IWrapper Target
    {
        get
        {
            return (Efl.Eo.IWrapper) weakRef.Target;
        }
    }

    /// <summary>Dictionary that holds the events related with the supervised object.</summary>
    public EventDictionary EoEvents
    {
        get
        {
            return eoEvents;
        }
    }

    /// <summary>To be called when the object is uniquely owned by C#, removing its strong reference and making it available to garbage collection.</summary>
    public void MakeUnique()
    {
        sharedRef = null;
    }

    /// <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>
    public void MakeShared()
    {
        if (this.Target == null)
            throw new InvalidOperationException("Tried to make a null reference shared.");
        sharedRef = this.Target;
    }
}

}

}