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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.Runtime.Interop
{
using Microsoft.Win32.SafeHandles;
using System.Runtime.InteropServices;
using System.Runtime.Versioning;
using System.Globalization;
using System.Diagnostics;
using System.Security;
[Fx.Tag.SecurityNote(Critical = "Usage of SafeHandleZeroOrMinusOneIsInvalid, which is protected by a LinkDemand and InheritanceDemand")]
[SecurityCritical]
sealed class SafeEventLogWriteHandle : SafeHandleZeroOrMinusOneIsInvalid
{
// Note: RegisterEventSource returns 0 on failure
[Fx.Tag.SecurityNote(Critical = "Usage of SafeHandleZeroOrMinusOneIsInvalid, which is protected by a LinkDemand and InheritanceDemand")]
[SecurityCritical]
SafeEventLogWriteHandle() : base(true) { }
[ResourceConsumption(ResourceScope.Machine)]
[Fx.Tag.SecurityNote(Critical = "Usage of SafeHandleZeroOrMinusOneIsInvalid, which is protected by a LinkDemand and InheritanceDemand")]
[SecurityCritical]
public static SafeEventLogWriteHandle RegisterEventSource(string uncServerName, string sourceName)
{
SafeEventLogWriteHandle retval = UnsafeNativeMethods.RegisterEventSource(uncServerName, sourceName);
int error = Marshal.GetLastWin32Error();
if (retval.IsInvalid)
{
Debug.Print("SafeEventLogWriteHandle::RegisterEventSource[" + uncServerName + ", " + sourceName + "] Failed. Last Error: " +
error.ToString(CultureInfo.InvariantCulture));
}
return retval;
}
[DllImport("advapi32", SetLastError = true)]
[ResourceExposure(ResourceScope.None)]
static extern bool DeregisterEventSource(IntPtr hEventLog);
[Fx.Tag.SecurityNote(Critical = "Usage of SafeHandleZeroOrMinusOneIsInvalid, which is protected by a LinkDemand and InheritanceDemand")]
[SecurityCritical]
protected override bool ReleaseHandle()
{
return DeregisterEventSource(this.handle);
}
}
}
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