IFND INTUITION_CLASSES_I
INTUITION_CLASSES_I SET 1
**
**  $Filename: intuition/classes.i $
**  $Release: 2.04 Includes, V37.4 $
**  $Revision: 36.3 $
**  $Date: 91/11/08 $
**
**  Only used by class implementors
**
**  (C) Copyright 1989-1999 Amiga, Inc.
**          All Rights Reserved
**

        IFND UTILITY_HOOKS_I
        INCLUDE "utility/hooks.i"
        ENDC

        IFND    INTUITION_CLASSUSR_I
        INCLUDE "intuition/classusr.i"
        ENDC

;*******************************************
;*** "White box" access to struct IClass ***
;*******************************************

 STRUCTURE ICLASS,0
    STRUCT cl_Dispatcher,h_SIZEOF
    ULONG  cl_Reserved          ; must be 0

    APTR   cl_Super
    APTR   cl_ID                ; pointer to null-terminated string

    ; where within an object is the instance data for this class?
    UWORD  cl_InstOffset
    UWORD  cl_InstSize

    ULONG  cl_UserData          ; per-class data of your choice
    ULONG  cl_SubclassCount     ; how many direct subclasses?
    ULONG  cl_ObjectCount       ; how many objects created of this class?
    ULONG  cl_Flags
    ; no iclass_SIZEOF because only Intuition allocates these

; defined values of cl_Flags
CLB_INLIST EQU 0
CLF_INLIST EQU $00000001        ; class in in public class list

; see classes.h for common calculations (sorry, no macros yet)

;**************************************************
;*** "White box" access to struct _Object     ***
;**************************************************

* We have this, the instance data of the root class, PRECEDING
* the "object".  This is so that Gadget objects are Gadget pointers,
* and so on.  If this structure grows, it will always have o_Class
* at the end, so the you can always get it by subtracting #4 from
* the pointer returned from NewObject().
*
* This data structure is subject to change.  Do not use the o_Node
* embedded structure.


 STRUCTURE _Object,0
    STRUCT o_Node,MLN_SIZE
    APTR   o_Class

    ; this value may change but difference between it and offset of o_Class
    ; will remain constant
    LABEL  _object_SIZEOF

    ENDC