SafeProcessHandle.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / CompMod / Microsoft / Win32 / SafeHandles / SafeProcessHandle.cs / 1 / SafeProcessHandle.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
/*============================================================
** 
** Class:  SafeProcessHandle 
**
** A wrapper for a process handle 
**
**
===========================================================*/
 
using System;
using System.Security; 
using System.Diagnostics; 
using System.Security.Permissions;
using System.Runtime.InteropServices; 
using System.Runtime.CompilerServices;
using Microsoft.Win32;
using Microsoft.Win32.SafeHandles;
using System.Runtime.ConstrainedExecution; 

namespace Microsoft.Win32.SafeHandles { 
    [HostProtectionAttribute(MayLeakOnAbort = true)] 
    [SuppressUnmanagedCodeSecurityAttribute]
    internal sealed class SafeProcessHandle : SafeHandleZeroOrMinusOneIsInvalid 
    {
        internal static SafeProcessHandle InvalidHandle = new SafeProcessHandle(IntPtr.Zero);

        // Note that OpenProcess returns 0 on failure 

        internal SafeProcessHandle() : base(true) {} 
 
        [SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode=true)]
        internal SafeProcessHandle(IntPtr handle) : base (true) { 
            SetHandle(handle);
        }

        // Not currently called 
        //[SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode=true)]
        //internal SafeProcessHandle(IntPtr existingHandle, bool ownsHandle) : base(ownsHandle) { 
        //    SetHandle(existingHandle); 
        //}
 
        [DllImport(ExternDll.Kernel32, CharSet=System.Runtime.InteropServices.CharSet.Auto, SetLastError=true)]
        internal static extern SafeProcessHandle OpenProcess(int access, bool inherit, int processId);

 
        internal void InitialSetHandle(IntPtr h){
            Debug.Assert(base.IsInvalid, "Safe handle should only be set once"); 
            base.handle = h; 
        }
 
        override protected bool ReleaseHandle()
        {
            return SafeNativeMethods.CloseHandle(handle);
        } 

    } 
}

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