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// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
namespace WixToolset.Msi
{
using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Threading;
using WixToolset.Core.Native;
/// <summary>
/// Wrapper class for MSI handle.
/// </summary>
public class MsiHandle : IDisposable
{
private bool disposed;
private uint handle;
private int owningThread;
#if DEBUG
private string creationStack;
#endif
/// <summary>
/// MSI handle destructor.
/// </summary>
~MsiHandle()
{
this.Dispose(false);
}
/// <summary>
/// Gets or sets the MSI handle.
/// </summary>
/// <value>The MSI handle.</value>
internal uint Handle
{
get
{
if (this.disposed)
{
throw new ObjectDisposedException("MsiHandle");
}
return this.handle;
}
set
{
if (this.disposed)
{
throw new ObjectDisposedException("MsiHandle");
}
this.handle = value;
this.owningThread = Thread.CurrentThread.ManagedThreadId;
#if DEBUG
this.creationStack = Environment.StackTrace;
#endif
}
}
/// <summary>
/// Close the MSI handle.
/// </summary>
public void Close()
{
this.Dispose();
}
/// <summary>
/// Disposes the managed and unmanaged objects in this object.
/// </summary>
public void Dispose()
{
this.Dispose(true);
GC.SuppressFinalize(this);
}
/// <summary>
/// Disposes the managed and unmanaged objects in this object.
/// </summary>
/// <param name="disposing">true to dispose the managed objects.</param>
protected virtual void Dispose(bool disposing)
{
if (!this.disposed)
{
if (0 != this.handle)
{
if (Thread.CurrentThread.ManagedThreadId == this.owningThread)
{
int error = MsiInterop.MsiCloseHandle(this.handle);
if (0 != error)
{
throw new Win32Exception(error);
}
this.handle = 0;
}
else
{
// Don't try to close the handle on a different thread than it was opened.
// This will occasionally cause MSI to AV.
string message = String.Format("Leaked msi handle {0} created on thread {1} by type {2}. This handle cannot be closed on thread {3}",
this.handle, this.owningThread, this.GetType(), Thread.CurrentThread.ManagedThreadId);
#if DEBUG
throw new InvalidOperationException(String.Format("{0}. Created {1}", message, this.creationStack));
#else
Debug.WriteLine(message);
#endif
}
}
this.disposed = true;
}
}
}
}
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