MethodRental.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Reflection / Emit / MethodRental.cs / 1305376 / 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.Runtime.Versioning; 
    using System.Globalization;
    using System.Security; 
    using System.Diagnostics.Contracts;

    // 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 
 
        [System.Security.SecuritySafeCritical]  // auto-generated
        [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"); 
            Contract.EndContractBlock();
 
            Module module = cls.Module; 
            InternalModuleBuilder internalMB;
            ModuleBuilder mb = module as ModuleBuilder; 
            if (mb != null)
                internalMB = mb.InternalModule;
            else
                internalMB = module as InternalModuleBuilder; 

            // can only swap method body on dynamic module 
            // dynamic internal module type is always exactly InternalModuleBuilder, non-dynamic is always something different 
            if (internalMB == null)
                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(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;
 
            RuntimeAssembly rtAssembly = internalMB.GetRuntimeAssembly(); 
            lock (rtAssembly.SyncRoot)
            { 
                SwapMethodBody(rType.GetTypeHandleInternal(), methodtoken, rgIL, methodSize, flags, JitHelpers.GetStackCrawlMarkHandle(ref mark));
            }
        }
 
        [System.Security.SecurityCritical]  // auto-generated
        [ResourceExposure(ResourceScope.None)] 
        [DllImport(JitHelpers.QCall, CharSet = CharSet.Unicode)] 
        [SuppressUnmanagedCodeSecurity]
        private extern static void SwapMethodBody( 
            RuntimeTypeHandle 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
            StackCrawlMarkHandle 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.
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MethodRental.cs source code in C# .NET

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