MethodRental.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ FXUpdate3074 / FXUpdate3074 / 1.1 / untmp / whidbey / QFE / ndp / clr / src / BCL / System / Reflection / Emit / MethodRental.cs / 2 / MethodRental.cs

                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
/*============================================================
** 
** Class:  MethodRental 
**
** 
** MethodRental class is to provide a fast way to swap method body implementation
**  given a method of a class
**
** 
===========================================================*/
namespace System.Reflection.Emit { 
 
    using System;
   using System.Reflection; 
    using System.Threading;
   using System.Runtime.CompilerServices;
    using System.Security.Permissions;
    using System.Runtime.InteropServices; 
    using System.Globalization;
 
    // MethodRental class provides the ability to insert a new method body of an 
    // existing method on a class defined in a DynamicModule.
    // Can throw OutOfMemory exception. 
    //
    //This class contains only static methods and does not require serialization.
    [HostProtection(MayLeakOnAbort = true)]
    [ClassInterface(ClassInterfaceType.None)] 
    [ComDefaultInterface(typeof(_MethodRental))]
[System.Runtime.InteropServices.ComVisible(true)] 
    sealed public class MethodRental : _MethodRental 
    {
      public const int JitOnDemand        = 0x0000;      // jit the method body when it is necessary 
      public const int JitImmediate    = 0x0001;      // jit the method body now

        [SecurityPermissionAttribute(SecurityAction.Demand, UnmanagedCode=true)]
        [MethodImplAttribute(MethodImplOptions.NoInlining)] // Methods containing StackCrawlMark local var has to be marked non-inlineable 
      public static void SwapMethodBody(
         Type     cls,           // [in] class containing the method 
         int         methodtoken,      // [in] method token 
         IntPtr      rgIL,          // [in] pointer to bytes
         int         methodSize,       // [in] the size of the new method body in bytes 
         int         flags)            // [in] flags
      {
            if (methodSize <= 0 || methodSize >= 0x3f0000)
                throw new ArgumentException(Environment.GetResourceString("Argument_BadSizeForData"), "methodSize"); 

            if (cls==null) 
                throw new ArgumentNullException("cls"); 

            // can only swap method body on dynamic module 
          if (!(cls.Module is ModuleBuilder))
            throw new NotSupportedException(Environment.GetResourceString("NotSupported_NotDynamicModule"));

            RuntimeType rType; 

            if (cls is TypeBuilder) 
            { 
                // If it is a TypeBuilder, make sure that TypeBuilder is already been baked.
                TypeBuilder typeBuilder = (TypeBuilder) cls; 
                if (typeBuilder.m_hasBeenCreated == false)
                    throw new NotSupportedException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("NotSupported_NotAllTypesAreBaked"), typeBuilder.Name));

                // get the corresponding runtime type for the TypeBuilder. 
                rType = typeBuilder.m_runtimeType as RuntimeType;
 
            } 
            else
            { 
                rType = cls as RuntimeType;
            }

            if (rType == null) 
                throw new ArgumentException(Environment.GetResourceString("Argument_MustBeRuntimeType"), "cls");
 
            StackCrawlMark mark = StackCrawlMark.LookForMyCaller; 

            if (rType.Assembly.m_assemblyData.m_isSynchronized) 
            {
                lock(rType.Assembly.m_assemblyData)
                {
                    SwapMethodBodyHelper(rType, methodtoken, rgIL, methodSize, flags, ref mark); 
                }
            } 
            else 
            {
                SwapMethodBodyHelper(rType, methodtoken, rgIL, methodSize, flags, ref mark); 
            }
       }

      [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        internal extern static void SwapMethodBodyHelper(
         RuntimeType cls,           // [in] class containing the method 
         int         methodtoken,      // [in] method token 
         IntPtr      rgIL,          // [in] pointer to bytes
         int         methodSize,       // [in] the size of the new method body in bytes 
            int         flags,              // [in] flags
            ref StackCrawlMark stackMark);  // [in] stack crawl mark used to find caller

      // private constructor to prevent class to be constructed. 
      private MethodRental() {}
 
 
        void _MethodRental.GetTypeInfoCount(out uint pcTInfo)
        { 
            throw new NotImplementedException();
        }

        void _MethodRental.GetTypeInfo(uint iTInfo, uint lcid, IntPtr ppTInfo) 
        {
            throw new NotImplementedException(); 
        } 

        void _MethodRental.GetIDsOfNames([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId) 
        {
            throw new NotImplementedException();
        }
 
        void _MethodRental.Invoke(uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
        { 
            throw new NotImplementedException(); 
        }
 
    }
}

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

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