Pointer.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Reflection / Pointer.cs / 1305376 / Pointer.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
////////////////////////////////////////////////////////////////////////////////
// 
// This is a wrapper class for Pointers 
//
// [....] 
//
//
//
// 
namespace System.Reflection {
    using System; 
    using CultureInfo = System.Globalization.CultureInfo; 
    using System.Runtime.Serialization;
    using System.Diagnostics.Contracts; 

    [CLSCompliant(false)]
    [Serializable]
    [System.Runtime.InteropServices.ComVisible(true)] 
    public sealed class Pointer: ISerializable {
        unsafe private void* _ptr; 
        private RuntimeType _ptrType; 

        private Pointer() {} 

        [System.Security.SecurityCritical]  // auto-generated
        private unsafe Pointer(SerializationInfo info, StreamingContext context)
        { 
            _ptr = ((IntPtr)(info.GetValue("_ptr", typeof(IntPtr)))).ToPointer();
            _ptrType = (RuntimeType)info.GetValue("_ptrType", typeof(RuntimeType)); 
        } 

        // This method will box an pointer.  We save both the 
        //    value and the type so we can access it from the native code
        //    during an Invoke.
        [System.Security.SecurityCritical]  // auto-generated
        public static unsafe Object Box(void *ptr,Type type) { 
            if (type == null)
                throw new ArgumentNullException("type"); 
            if (!type.IsPointer) 
                throw new ArgumentException(Environment.GetResourceString("Arg_MustBePointer"),"ptr");
            Contract.EndContractBlock(); 

            RuntimeType rt = type as RuntimeType;
            if (rt == null)
                throw new ArgumentException(Environment.GetResourceString("Arg_MustBePointer"), "ptr"); 

            Pointer x = new Pointer(); 
            x._ptr = ptr; 
            x._ptrType = rt;
            return x; 
        }

        // Returned the stored pointer.
        [System.Security.SecurityCritical]  // auto-generated 
        public static unsafe void* Unbox(Object ptr) {
            if (!(ptr is Pointer)) 
                throw new ArgumentException(Environment.GetResourceString("Arg_MustBePointer"),"ptr"); 
            return ((Pointer)ptr)._ptr;
        } 

        internal RuntimeType GetPointerType() {
            return _ptrType;
        } 

        [System.Security.SecurityCritical]  // auto-generated 
        internal unsafe Object GetPointerValue() { 
            return (IntPtr)_ptr;
        } 

#if FEATURE_SERIALIZATION
        [System.Security.SecurityCritical]
        unsafe void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context) { 
            info.AddValue("_ptr", new IntPtr(_ptr));
            info.AddValue("_ptrType", _ptrType); 
        } 
#endif
    } 
}

// 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