SafeJobHandle.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / infocard / Service / managed / Microsoft / InfoCards / SafeJobHandle.cs / 1 / SafeJobHandle.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------
//
// Presharp uses the c# pragma mechanism to supress its warnings. 
// These are not recognised by the base compiler so we need to explictly
// disable the following warnings. See http://winweb/cse/Tools/PREsharp/userguide/default.asp 
// for details. 
//
#pragma warning disable 1634, 1691      // unknown message, unknown pragma 



namespace Microsoft.InfoCards 
{
    using System; 
    using System.Security; 
    using System.Security.Permissions;
    using System.Runtime.InteropServices; 
    using System.Runtime.CompilerServices;
    using System.Runtime.ConstrainedExecution;
    using Microsoft.Win32.SafeHandles;
 
    //
    // Summary: 
    // This is a wrapper for Win32 Job handles that ensures that they get closed and that the handle 
    // held by this object isn't recycled.
    // 
    internal sealed class SafeJobHandle : SafeHandle
    {
        [DllImport("Kernel32.dll",
                    EntryPoint      ="TerminateJobObject", 
                    CharSet         = CharSet.Unicode,
                    ExactSpelling   = true, 
                    SetLastError    = true ) ] 
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        [SuppressUnmanagedCodeSecurity] 
        private static extern bool TerminateJobObject(
                                [In] IntPtr hJob,
                                [In] UInt32 uExitCode );
 

 
        public SafeJobHandle() : base( IntPtr.Zero, true ) 
        {
        } 
        public override bool IsInvalid
        {
            get
            { 
                return ( IntPtr.Zero == base.handle );
            } 
        } 
        [ReliabilityContract( Consistency.WillNotCorruptState, Cer.Success ) ]
        public void UpdateHandle( IntPtr handle ) 
        {
            base.SetHandle( handle );
        }
 
        override protected bool ReleaseHandle()
        { 
            // 
            // Presharp:  failure of TerminateJobObject is part of the desired behavior of this function,
            // hence we have no need for calling GetLastW32Error. 
            //
#pragma warning suppress 56523
            TerminateJobObject( handle, 0 );
            // 
            // Presharp: once again, this function's design is to return the result of success or failure from
            // these native calls. 
            // 
#pragma warning suppress 56523
            return NativeMethods.SafeHandleOnlyMethods.CloseHandle( handle ); 
        }
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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