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1 | ;;; -*-lisp-*- |
2 | ;;; | |
3 | ;;; Layout for instances and vtables | |
4 | ;;; | |
5 | ;;; (c) 2009 Straylight/Edgeware | |
6 | ;;; | |
7 | ||
8 | ;;;----- Licensing notice --------------------------------------------------- | |
9 | ;;; | |
10 | ;;; This file is part of the Simple Object Definition system. | |
11 | ;;; | |
12 | ;;; SOD is free software; you can redistribute it and/or modify | |
13 | ;;; it under the terms of the GNU General Public License as published by | |
14 | ;;; the Free Software Foundation; either version 2 of the License, or | |
15 | ;;; (at your option) any later version. | |
16 | ;;; | |
17 | ;;; SOD is distributed in the hope that it will be useful, | |
18 | ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;;; GNU General Public License for more details. | |
21 | ;;; | |
22 | ;;; You should have received a copy of the GNU General Public License | |
23 | ;;; along with SOD; if not, write to the Free Software Foundation, | |
24 | ;;; Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
25 | ||
26 | (cl:in-package #:sod) | |
27 | ||
28 | ;;;-------------------------------------------------------------------------- | |
29 | ;;; Effective slot objects. | |
30 | ||
31 | (defclass effective-slot () | |
32 | ((class :initarg :class :type sod-slot :reader effective-slot-class) | |
33 | (slot :initarg :slot :type sod-slot :reader effective-slot-direct-slot) | |
34 | (initializer :initarg :initializer :type (or sod-initializer null) | |
35 | :reader effective-slot-initializer)) | |
36 | (:documentation | |
37 | "Describes a slot and how it's meant to be initialized. | |
38 | ||
39 | Effective slot objects are usually attached to layouts.")) | |
40 | ||
41 | (defgeneric find-slot-initializer (class slot) | |
42 | (:documentation | |
43 | "Return the most specific initializer for SLOT, starting from CLASS.")) | |
44 | ||
45 | (defgeneric compute-effective-slot (class slot) | |
46 | (:documentation | |
47 | "Construct an effective slot from the supplied direct slot. | |
48 | ||
49 | SLOT is a direct slot defined on CLASS or one of its superclasses. | |
50 | (Metaclass initializers are handled using a different mechanism.)")) | |
51 | ||
52 | ;;;-------------------------------------------------------------------------- | |
53 | ;;; Instance layout objects. | |
54 | ||
55 | (defclass islots () | |
56 | ((class :initarg :class :type sod-class :reader islots-class) | |
57 | (subclass :initarg :subclass :type sod-class :reader islots-subclass) | |
58 | (slots :initarg :slots :type list :reader islots-slots)) | |
59 | (:documentation | |
60 | "The collection of effective SLOTS defined by an instance of CLASS.")) | |
61 | ||
62 | ;;; Standard implementation. | |
63 | ||
64 | ;;;-------------------------------------------------------------------------- | |
65 | ;;; Effective methods. | |
66 | ||
67 | ;;;-------------------------------------------------------------------------- | |
68 | ;;; Vtable layout. | |
69 | ||
70 | ;;; vtmsgs | |
71 | ||
72 | ;;; base-offset | |
73 | ||
74 | ;;; chain-offset | |
75 | ||
76 | ;;; vtable | |
77 | ||
78 | ;;; Implementation. | |
79 | ||
80 | ;;;----- That's all, folks -------------------------------------------------- |