/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Microsoft Public License. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Microsoft Public License, please send an email to
* dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Microsoft Public License.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
#if !SILVERLIGHT // ComObject
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Security;
namespace Microsoft.Scripting.ComInterop{
/// <summary>
/// ComEventSinksContainer is just a regular list with a finalizer.
/// This list is usually attached as a custom data for RCW object and
/// is finalized whenever RCW is finalized.
/// </summary>
internal class ComEventSinksContainer : List<ComEventSink>, IDisposable {
private ComEventSinksContainer() {
}
private static readonly object _ComObjectEventSinksKey = new object();
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2201:DoNotRaiseReservedExceptionTypes")]
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1002:DoNotExposeGenericLists")]
public static ComEventSinksContainer FromRuntimeCallableWrapper(object rcw, bool createIfNotFound) {
// !!! Marshal.Get/SetComObjectData has a LinkDemand for UnmanagedCode which will turn into
// a full demand. We need to avoid this by making this method SecurityCritical
object data = Marshal.GetComObjectData(rcw, _ComObjectEventSinksKey);
if (data != null || createIfNotFound == false) {
return (ComEventSinksContainer)data;
}
lock (_ComObjectEventSinksKey) {
data = Marshal.GetComObjectData(rcw, _ComObjectEventSinksKey);
if (data != null) {
return (ComEventSinksContainer)data;
}
ComEventSinksContainer comEventSinks = new ComEventSinksContainer();
if (!Marshal.SetComObjectData(rcw, _ComObjectEventSinksKey, comEventSinks)) {
throw Error.SetComObjectDataFailed();
}
return comEventSinks;
}
}
#region IDisposable Members
public void Dispose() {
DisposeAll();
GC.SuppressFinalize(this);
}
#endregion
private void DisposeAll() {
foreach (ComEventSink sink in this) {
sink.Dispose();
}
}
~ComEventSinksContainer() {
DisposeAll();
}
}
}
#endif
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