86 lines
2.8 KiB
C#
86 lines
2.8 KiB
C#
// ==++==
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// ==--==
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////////////////////////////////////////////////////////////////////////////////
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//
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// This is a wrapper class for Pointers
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//
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// <OWNER>[....]</OWNER>
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//
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//
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//
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//
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namespace System.Reflection {
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using System;
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using CultureInfo = System.Globalization.CultureInfo;
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using System.Runtime.Serialization;
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using System.Security;
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using System.Diagnostics.Contracts;
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[CLSCompliant(false)]
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[Serializable]
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[System.Runtime.InteropServices.ComVisible(true)]
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public sealed class Pointer: ISerializable {
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[SecurityCritical]
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unsafe private void* _ptr;
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private RuntimeType _ptrType;
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private Pointer() {}
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[System.Security.SecurityCritical] // auto-generated
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private unsafe Pointer(SerializationInfo info, StreamingContext context)
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{
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_ptr = ((IntPtr)(info.GetValue("_ptr", typeof(IntPtr)))).ToPointer();
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_ptrType = (RuntimeType)info.GetValue("_ptrType", typeof(RuntimeType));
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}
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// This method will box an pointer. We save both the
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// value and the type so we can access it from the native code
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// during an Invoke.
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[System.Security.SecurityCritical] // auto-generated
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public static unsafe Object Box(void *ptr,Type type) {
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if (type == null)
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throw new ArgumentNullException("type");
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if (!type.IsPointer)
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throw new ArgumentException(Environment.GetResourceString("Arg_MustBePointer"),"ptr");
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Contract.EndContractBlock();
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RuntimeType rt = type as RuntimeType;
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if (rt == null)
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throw new ArgumentException(Environment.GetResourceString("Arg_MustBePointer"), "ptr");
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Pointer x = new Pointer();
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x._ptr = ptr;
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x._ptrType = rt;
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return x;
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}
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// Returned the stored pointer.
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[System.Security.SecurityCritical] // auto-generated
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public static unsafe void* Unbox(Object ptr) {
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if (!(ptr is Pointer))
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throw new ArgumentException(Environment.GetResourceString("Arg_MustBePointer"),"ptr");
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return ((Pointer)ptr)._ptr;
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}
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internal RuntimeType GetPointerType() {
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return _ptrType;
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}
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[System.Security.SecurityCritical] // auto-generated
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internal unsafe Object GetPointerValue() {
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return (IntPtr)_ptr;
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}
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#if FEATURE_SERIALIZATION
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[System.Security.SecurityCritical]
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unsafe void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context) {
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info.AddValue("_ptr", new IntPtr(_ptr));
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info.AddValue("_ptrType", _ptrType);
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}
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#endif
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}
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}
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