Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/mscorlib/system/reflection/pointer.cs

@@ -0,0 +1,85 @@
+// ==++==
+// 
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+// 
+// ==--==
+////////////////////////////////////////////////////////////////////////////////
+//
+// This is a wrapper class for Pointers
+// 
+// <OWNER>[....]</OWNER>
+//
+// 
+//  
+//
+namespace System.Reflection {
+    using System;
+    using CultureInfo = System.Globalization.CultureInfo;
+    using System.Runtime.Serialization;
+    using System.Security;
+    using System.Diagnostics.Contracts;
+
+    [CLSCompliant(false)]
+    [Serializable]
+    [System.Runtime.InteropServices.ComVisible(true)]
+    public sealed class Pointer: ISerializable {
+        [SecurityCritical]
+        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
+    }
+}