67 lines
1.9 KiB
C#
67 lines
1.9 KiB
C#
// ==++==
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// ==--==
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/*============================================================
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**
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** Class: SafeProcessHandle
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**
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** A wrapper for a process handle
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**
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**
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===========================================================*/
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using System;
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using System.Security;
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using System.Diagnostics;
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using System.Security.Permissions;
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using System.Runtime.InteropServices;
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using System.Runtime.CompilerServices;
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using Microsoft.Win32;
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using Microsoft.Win32.SafeHandles;
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using System.Runtime.ConstrainedExecution;
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using System.Runtime.Versioning;
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namespace Microsoft.Win32.SafeHandles {
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[SuppressUnmanagedCodeSecurityAttribute]
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internal sealed class SafeProcessHandle : SafeHandleZeroOrMinusOneIsInvalid
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{
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internal static SafeProcessHandle InvalidHandle = new SafeProcessHandle(IntPtr.Zero);
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// Note that OpenProcess returns 0 on failure
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internal SafeProcessHandle() : base(true) {}
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internal SafeProcessHandle(IntPtr handle) : base (true) {
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SetHandle(handle);
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}
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// Not currently called
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//[SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode=true)]
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//internal SafeProcessHandle(IntPtr existingHandle, bool ownsHandle) : base(ownsHandle) {
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// SetHandle(existingHandle);
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//}
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[DllImport(ExternDll.Kernel32, CharSet=System.Runtime.InteropServices.CharSet.Auto, SetLastError=true)]
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[ResourceExposure(ResourceScope.Machine)]
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internal static extern SafeProcessHandle OpenProcess(int access, bool inherit, int processId);
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internal void InitialSetHandle(IntPtr h){
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Debug.Assert(base.IsInvalid, "Safe handle should only be set once");
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base.handle = h;
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}
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override protected bool ReleaseHandle()
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{
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return SafeNativeMethods.CloseHandle(handle);
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}
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}
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}
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