SafeNativeMemoryHandle.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / Configuration / Microsoft / Win32 / SafeNativeMemoryHandle.cs / 1 / SafeNativeMemoryHandle.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace Microsoft.Win32 { 
    using System.Runtime.InteropServices; 
    using System;
    using System.Security.Permissions; 
    using Microsoft.Win32.SafeHandles;
    using System.Configuration;

    // Safehandle for memory handles 
    [System.Security.SuppressUnmanagedCodeSecurityAttribute()]
    internal sealed class SafeNativeMemoryHandle : SafeHandleZeroOrMinusOneIsInvalid { 
        private bool _useLocalFree = false; 
        [SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode = true)]
        internal SafeNativeMemoryHandle() 
            : this(false) {
        }

        internal SafeNativeMemoryHandle(bool useLocalFree) 
            : base(true) {
            _useLocalFree = useLocalFree; 
        } 

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

        internal void SetDataHandle(IntPtr handle) { 
            SetHandle(handle); 
        }
 
        override protected bool ReleaseHandle() {
            if (handle != IntPtr.Zero) {
                if (_useLocalFree == true)
                    UnsafeNativeMethods.LocalFree(handle); 
                else
                    Marshal.FreeHGlobal(handle); 
                handle = IntPtr.Zero; 
                return true;
            } 
            return false;
        }
    }
 

} 
 

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

namespace Microsoft.Win32 { 
    using System.Runtime.InteropServices; 
    using System;
    using System.Security.Permissions; 
    using Microsoft.Win32.SafeHandles;
    using System.Configuration;

    // Safehandle for memory handles 
    [System.Security.SuppressUnmanagedCodeSecurityAttribute()]
    internal sealed class SafeNativeMemoryHandle : SafeHandleZeroOrMinusOneIsInvalid { 
        private bool _useLocalFree = false; 
        [SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode = true)]
        internal SafeNativeMemoryHandle() 
            : this(false) {
        }

        internal SafeNativeMemoryHandle(bool useLocalFree) 
            : base(true) {
            _useLocalFree = useLocalFree; 
        } 

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

        internal void SetDataHandle(IntPtr handle) { 
            SetHandle(handle); 
        }
 
        override protected bool ReleaseHandle() {
            if (handle != IntPtr.Zero) {
                if (_useLocalFree == true)
                    UnsafeNativeMethods.LocalFree(handle); 
                else
                    Marshal.FreeHGlobal(handle); 
                handle = IntPtr.Zero; 
                return true;
            } 
            return false;
        }
    }
 

} 
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

Link Menu

Network programming in C#, Network Programming in VB.NET, Network Programming in .NET
This book is available now!
Buy at Amazon US or
Buy at Amazon UK