Fixed issue where a DynamicMethod was being collected when it shouldn't have been.

Turns out that the Console.WriteLine was just putting off the inevitable.

git-svn-id: https://mono-soc-2010.googlecode.com/svn/trunk/cppinterop@18 a470b8cb-0e6f-1642-1b45-71e107334c4b

CPPPOC/Main.cs

@@ -19,7 +19,8 @@ namespace CPPPOC
 			CSimpleClass csc1 = new CSimpleClass(CreateCSimpleSubClass(10));
 			CSimpleClass csc2 = new CSimpleClass(2);
 			try {
-
+                                //TODO: This still calls managed V0 on CSimpleClass first, even though it's an
+                                // instance of a more-derived class.
                                 csc1.V0(25, 50);
 				csc1.M0();
 				Console.WriteLine("Managed code got value: {0}", csc1.value);

Mono.VisualC.Interop/ABI/VTable.cs

@@ -17,8 +17,11 @@ using System.Runtime.InteropServices;
 namespace Mono.VisualC.Interop.ABI {
         public abstract class VTable : IDisposable {
                 protected IntPtr basePtr, vtPtr;
+                protected Delegate[] overrides;
 
-                public virtual int EntryCount { get; protected set; }
+                public virtual int EntryCount {
+                        get { return overrides.Length; }
+                }
                 public virtual int EntrySize {
                         get { return Marshal.SizeOf (typeof (IntPtr)); }
                 }
@@ -29,16 +32,14 @@ namespace Mono.VisualC.Interop.ABI {
                 // Creates a new VTable
                 public VTable (Delegate[] overrides)
                 {
-                        EntryCount = overrides.Length;
-                        Console.WriteLine ("VTable entry count: {0}", EntryCount);
-                        basePtr = IntPtr.Zero;
-                        vtPtr = IntPtr.Zero;
+                        this.overrides = overrides;
+                        this.basePtr = IntPtr.Zero;
+                        this.vtPtr = IntPtr.Zero;
                 }
 
-                public virtual void WriteOverrides (Delegate[] overrides)
+                protected virtual void WriteOverrides (int offset)
                 {
                         IntPtr vtEntryPtr;
-                        int offset = 0;
                         for (int i = 0; i < EntryCount; i++) {
 
                                 if (overrides [i] != null) // managed override

Mono.VisualC.Interop/ABI/VTableCOM.cs

@@ -25,7 +25,7 @@ namespace Mono.VisualC.Interop.ABI {
                                                 select entry).Count();
 
                         vtPtr = Marshal.AllocHGlobal ((EntryCount + managedOverrides) * EntrySize);
-                        WriteOverrides (entries);
+                        WriteOverrides (0);
                 }
 
                public override MethodInfo PrepareVirtualCall (MethodInfo target, ILGenerator callsite, FieldInfo vtableField,

Mono.VisualC.Interop/ABI/VTableManaged.cs

@@ -16,31 +16,26 @@ using System.Runtime.InteropServices;
 
 namespace Mono.VisualC.Interop.ABI {
 	public class VTableManaged : VTable {
-
-                private Type[] delegateTypes;
                 private ModuleBuilder implModule;
 
 		public VTableManaged (ModuleBuilder implModule, Delegate[] entries) : base(entries)
                 {
                         this.implModule = implModule;
-                        this.delegateTypes = new Type [EntryCount];
-
-                        for (int i = 0; i < EntryCount; i++) {
-                                if (entries [i] != null)
-                                        delegateTypes [i] = entries [i].GetType ();
-                        }
+                        this.vtPtr = Marshal.AllocHGlobal (EntryCount * EntrySize);
 
-                        vtPtr = Marshal.AllocHGlobal (EntryCount * EntrySize);
-                        WriteOverrides (entries);
+                        WriteOverrides (0);
 		}
 
                 public override MethodInfo PrepareVirtualCall (MethodInfo target, ILGenerator callsite, FieldInfo vtableField,
                                                                LocalBuilder native, int vtableIndex)
                 {
-                        if (delegateTypes [vtableIndex] == null)
-                                delegateTypes [vtableIndex] = Util.GetDelegateTypeForMethodInfo (implModule, target);
+                        Type delegateType;
+                        if (overrides [vtableIndex] != null)
+                                delegateType = overrides [vtableIndex].GetType ();
+                        else
+                                delegateType = Util.GetDelegateTypeForMethodInfo (implModule, target);
 
-                        MethodInfo getDelegate = typeof (VTableManaged).GetMethod ("GetDelegateForNative").MakeGenericMethod (delegateTypes [vtableIndex]);
+                        MethodInfo getDelegate = typeof (VTableManaged).GetMethod ("GetDelegateForNative").MakeGenericMethod (delegateType);
 
                         // load this._vtable
                         callsite.Emit (OpCodes.Ldarg_0);
@@ -60,7 +55,7 @@ namespace Mono.VisualC.Interop.ABI {
                         callsite.Emit (OpCodes.Throw);
                         callsite.MarkLabel (notNull);
 
-                        return delegateTypes [vtableIndex].GetMethod ("Invoke");
+                        return delegateType.GetMethod ("Invoke");
 
                 }