private static void EmitOverride_ReadTMany(TypeBuilder tb, string name, StaticCacheDescription readManyCacheDesc, FieldInfo mapperInstance)
{
MethodInfo miDeclaration = typeof(Reader).GetMethod(name, BindingFlags.NonPublic | BindingFlags.Instance);
MethodBuilder mb = tb.DefineMethod(name, MethodAttributes.Family | MethodAttributes.Virtual);
GenericTypeParameterBuilder genTypeParam = mb.DefineGenericParameters("T")[0];
mb.SetReturnType(genTypeParam);
mb.SetParameters(typeof(uint));
tb.DefineMethodOverride(mb, miDeclaration);
FieldInfo fi = readManyCacheDesc.Instance(genTypeParam);
ILGenerator il = mb.GetILGenerator();
Label noBuild = il.DefineLabel();
il.Emit(OpCodes.Ldsfld, fi);
il.Emit(OpCodes.Brtrue, noBuild);
il.Emit(OpCodes.Ldsfld, mapperInstance);
il.Emit(OpCodes.Call, typeof(ReadMapper).GetMethod("BuildCaches", BindingFlags.Public | BindingFlags.Instance));
il.MarkLabel(noBuild);
il.Emit(OpCodes.Ldsfld, fi);
il.Emit(OpCodes.Ldarg_0); // this reader
il.Emit(OpCodes.Ldarg_1); // len or max
MethodInfo miInvoke = TypeBuilder.GetMethod(typeof(ReadManyDelegate <>).MakeGenericType(genTypeParam),
typeof(ReadManyDelegate <>).GetMethod("Invoke"));
il.Emit(OpCodes.Callvirt, miInvoke);
il.Emit(OpCodes.Ret);
}
public WriteBuilder()
{
string name = "DynamicXdrWriteMapper";
AssemblyName asmName = new AssemblyName(name);
AssemblyBuilder asmBuilder = AppDomain.CurrentDomain.DefineDynamicAssembly(asmName, AssemblyBuilderAccess.RunAndSave);
_modBuilder = asmBuilder.DefineDynamicModule(name + ".dll", name + ".dll");
_buildBinderDescription = new BuildBinderDescription(_modBuilder);
_oneCacheDescription = new StaticCacheDescription(_modBuilder, _buildBinderDescription, "OneCache", false, OpaqueType.One);
_fixCacheDescription = new StaticCacheDescription(_modBuilder, _buildBinderDescription, "FixCache", false, OpaqueType.Fix);
_varCacheDescription = new StaticCacheDescription(_modBuilder, _buildBinderDescription, "VarCache", false, OpaqueType.Var);
Type dynWriteMapperType = EmitDynWriteMapper();
_wm = (WriteMapper)Activator.CreateInstance(dynWriteMapperType);
Type dynWriterType = EmitDynWriter();
FieldInfo mapperInstance = dynWriterType.GetField("Mapper", BindingFlags.Public | BindingFlags.Static);
mapperInstance.SetValue(null, _wm);
_creater = EmitCreater(dynWriterType.GetConstructor(new Type[] { typeof(IByteWriter) }));
}
