SafeFileMappingHandle.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / CompMod / Microsoft / Win32 / SafeHandles / SafeFileMappingHandle.cs / 1 / SafeFileMappingHandle.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
/*============================================================
** 
** Class:  SafeFileMappingHandle 
**
** Author: David Gutierrez ([....])  
**
** A wrapper for handle to file mappings, returned by
** CreateFileMapping and OpenFileMapping.  Used for shared
** memory. 
**
** Date:  July 8, 2002 
** 
===========================================================*/
 
using System;
using System.Security;
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 SafeFileMappingHandle : SafeHandleZeroOrMinusOneIsInvalid 
    {
        // Note that CreateFileMapping returns 0 on failure. 
 
        // Note that you can pass in -1 for the hFile parameter.
        [SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode=true)] 
        internal SafeFileMappingHandle() : base(true) {}

        [DllImport(ExternDll.Kernel32, ExactSpelling=true, SetLastError=true)]
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] 
        private static extern bool CloseHandle(IntPtr handle);
 
        override protected bool ReleaseHandle() 
        {
            return CloseHandle(handle); 
        }
    }
}

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