Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / CompMod / Microsoft / Win32 / SafeHandles / SafeFileMapViewHandle.cs / 1305376 / SafeFileMapViewHandle.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================ ** ** Class: SafeFileMapViewHandle ** **Author: Brian Grunkemeyer ([....]) ** ** A wrapper for handles returned from MapViewOfFile, used ** for shared memory. ** ** Date: August 7, 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; using System.Runtime.Versioning; namespace Microsoft.Win32.SafeHandles { [HostProtectionAttribute(MayLeakOnAbort = true)] [SuppressUnmanagedCodeSecurityAttribute] internal sealed class SafeFileMapViewHandle : SafeHandleZeroOrMinusOneIsInvalid { // Note that MapViewOfFile returns 0 on failure internal SafeFileMapViewHandle() : base(true) {} [DllImport(ExternDll.Kernel32, ExactSpelling=true, CharSet=CharSet.Auto)] [ResourceExposure(ResourceScope.Machine)] internal static extern SafeFileMapViewHandle MapViewOfFile(SafeFileMappingHandle hFileMappingObject, int dwDesiredAccess, int dwFileOffsetHigh, int dwFileOffsetLow, UIntPtr dwNumberOfBytesToMap); [DllImport(ExternDll.Kernel32, ExactSpelling=true, SetLastError=true)] [ResourceExposure(ResourceScope.None)] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] private static extern bool UnmapViewOfFile(IntPtr handle); override protected bool ReleaseHandle() { return UnmapViewOfFile(handle); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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