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