public static FastMethodHandler MethodHandler(MethodInfo method) { FastMethodHandler handler = null; if (mMethodHandlers.ContainsKey(method)) { handler = mMethodHandlers[method]; } else { lock (typeof(ReflectionHandlerFactory)) { if (mMethodHandlers.ContainsKey(method)) { handler = mMethodHandlers[method]; } else { handler = CreateMethodHandler(method); mMethodHandlers.Add(method, handler); } } } return(handler); }
private static FastMethodHandler CreateMethodHandler(MethodInfo methodInfo) { DynamicMethod dynamicMethod = new DynamicMethod(string.Empty, typeof(object), new Type[] { typeof(object), typeof(object[]) }, methodInfo.DeclaringType.Module); ILGenerator il = dynamicMethod.GetILGenerator(); ParameterInfo[] ps = methodInfo.GetParameters(); Type[] paramTypes = new Type[ps.Length]; for (int i = 0; i < paramTypes.Length; i++) { if (ps[i].ParameterType.IsByRef) { paramTypes[i] = ps[i].ParameterType.GetElementType(); } else { paramTypes[i] = ps[i].ParameterType; } } LocalBuilder[] locals = new LocalBuilder[paramTypes.Length]; for (int i = 0; i < paramTypes.Length; i++) { locals[i] = il.DeclareLocal(paramTypes[i], true); } for (int i = 0; i < paramTypes.Length; i++) { il.Emit(OpCodes.Ldarg_1); EmitFastInt(il, i); il.Emit(OpCodes.Ldelem_Ref); EmitCastToReference(il, paramTypes[i]); il.Emit(OpCodes.Stloc, locals[i]); } if (!methodInfo.IsStatic) { il.Emit(OpCodes.Ldarg_0); } for (int i = 0; i < paramTypes.Length; i++) { if (ps[i].ParameterType.IsByRef) { il.Emit(OpCodes.Ldloca_S, locals[i]); } else { il.Emit(OpCodes.Ldloc, locals[i]); } } if (methodInfo.IsStatic) { il.EmitCall(OpCodes.Call, methodInfo, null); } else { il.EmitCall(OpCodes.Callvirt, methodInfo, null); } if (methodInfo.ReturnType == typeof(void)) { il.Emit(OpCodes.Ldnull); } else { EmitBoxIfNeeded(il, methodInfo.ReturnType); } for (int i = 0; i < paramTypes.Length; i++) { if (ps[i].ParameterType.IsByRef) { il.Emit(OpCodes.Ldarg_1); EmitFastInt(il, i); il.Emit(OpCodes.Ldloc, locals[i]); if (locals[i].LocalType.IsValueType) { il.Emit(OpCodes.Box, locals[i].LocalType); } il.Emit(OpCodes.Stelem_Ref); } } il.Emit(OpCodes.Ret); FastMethodHandler invoder = (FastMethodHandler)dynamicMethod.CreateDelegate(typeof(FastMethodHandler)); return(invoder); }