mirror of https://github.com/dahall/Vanara.git
43 lines
1.3 KiB
C#
43 lines
1.3 KiB
C#
|
using System;
|
|||
|
using static Vanara.PInvoke.Kernel32;
|
|||
|
|
|||
|
namespace Vanara.IO
|
|||
|
{
|
|||
|
/// <summary>
|
|||
|
/// Suspends File System Redirection if found to be in effect. Effectively, this calls <c>IsWow64Process</c> to determine state and then disables
|
|||
|
/// redirection using <c>Wow64DisableWow64FsRedirection</c>. It then reverts redirection at disposal using <c>Wow64RevertWow64FsRedirection</c>.
|
|||
|
/// </summary>
|
|||
|
/// <remarks>
|
|||
|
/// This class is best used in a <c>using</c> clause as follows:
|
|||
|
/// <code lang="cs">
|
|||
|
/// using (new Wow64Redirect())
|
|||
|
/// {
|
|||
|
/// if (System.IO.File.Exists(@"C:\Windows\System32\qmgr.dll"))
|
|||
|
/// {
|
|||
|
/// // Do something
|
|||
|
/// }
|
|||
|
/// }
|
|||
|
/// </code>
|
|||
|
/// </remarks>
|
|||
|
public class Wow64Redirect : IDisposable
|
|||
|
{
|
|||
|
private readonly bool isWow64;
|
|||
|
private readonly IntPtr oldVal;
|
|||
|
|
|||
|
/// <summary>Initializes a new instance of the <see cref="Wow64Redirect"/> class.</summary>
|
|||
|
public Wow64Redirect()
|
|||
|
{
|
|||
|
if (isWow64 = (IsWow64Process(GetCurrentProcess(), out var wow) && wow))
|
|||
|
Wow64DisableWow64FsRedirection(out oldVal);
|
|||
|
}
|
|||
|
|
|||
|
/// <summary>
|
|||
|
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
|
|||
|
/// </summary>
|
|||
|
void IDisposable.Dispose()
|
|||
|
{
|
|||
|
if (isWow64)
|
|||
|
Wow64RevertWow64FsRedirection(oldVal);
|
|||
|
}
|
|||
|
}
|
|||
|
}
|