MegaBites-AI/Windows-powershell

1// Licensed to the .NET Foundation under one or more agreements.2// The .NET Foundation licenses this file to you under the MIT license.3 4using System;5using System.Collections.Generic;6using System.Runtime.InteropServices;7using System.Management.Automation.InteropServices;8 9namespace System.Management.Automation.ComInterop10{11    /// <summary>12    /// ComEventSinksContainer is just a regular list with a finalizer.13    /// This list is usually attached as a custom data for RCW object and14    /// is finalized whenever RCW is finalized.15    /// </summary>16    internal class ComEventSinksContainer : List<ComEventsSink>, IDisposable17    {18        private ComEventSinksContainer()19        {20        }21 22        private static readonly object s_comObjectEventSinksKey = new object();23 24        public static ComEventSinksContainer FromRuntimeCallableWrapper(object rcw, bool createIfNotFound)25        {26            object data = Marshal.GetComObjectData(rcw, s_comObjectEventSinksKey);27            if (data != null || !createIfNotFound)28            {29                return (ComEventSinksContainer)data;30            }31 32            lock (s_comObjectEventSinksKey)33            {34                data = Marshal.GetComObjectData(rcw, s_comObjectEventSinksKey);35                if (data != null)36                {37                    return (ComEventSinksContainer)data;38                }39 40                ComEventSinksContainer comEventSinks = new ComEventSinksContainer();41                if (!Marshal.SetComObjectData(rcw, s_comObjectEventSinksKey, comEventSinks))42                {43                    throw Error.SetComObjectDataFailed();44                }45 46                return comEventSinks;47            }48        }49 50        #region IDisposable Members51 52        public void Dispose()53        {54            DisposeAll();55            GC.SuppressFinalize(this);56        }57 58        #endregion59 60        private void DisposeAll()61        {62            foreach (ComEventsSink sink in this)63            {64                ComEventsSink.RemoveAll(sink);65            }66        }67 68        ~ComEventSinksContainer()69        {70            DisposeAll();71        }72    }73}74