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comparison src/opaque.h @ 428:3ecd8885ac67 r21-2-22

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Import from CVS: tag r21-2-22
author cvs
date Mon, 13 Aug 2007 11:28:15 +0200
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427:0a0253eac470 428:3ecd8885ac67
1 /* Opaque Lisp objects.
2 Copyright (C) 1993 Sun Microsystems, Inc.
3 Copyright (C) 1995, 1996 Ben Wing.
4
5 This file is part of XEmacs.
6
7 XEmacs is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 2, or (at your option) any
10 later version.
11
12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with XEmacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22 /* Synched up with: Not in FSF. */
23
24 /* Written by Ben Wing, October 1993. */
25
26 #ifndef _XEMACS_OPAQUE_H_
27 #define _XEMACS_OPAQUE_H_
28
29 typedef union {
30 struct { Lisp_Object obj; } obj;
31 struct { void *p; } p;
32 struct { double d; } d;
33 } max_align_t;
34
35 typedef struct Lisp_Opaque
36 {
37 struct lcrecord_header header;
38 size_t size;
39 max_align_t data[1];
40 } Lisp_Opaque;
41
42 DECLARE_LRECORD (opaque, Lisp_Opaque);
43 #define XOPAQUE(x) XRECORD (x, opaque, Lisp_Opaque)
44 #define XSETOPAQUE(x, p) XSETRECORD (x, p, opaque)
45 #define OPAQUEP(x) RECORDP (x, opaque)
46 /* #define CHECK_OPAQUE(x) CHECK_RECORD (x, opaque)
47 Opaque pointers should never escape to the Lisp level, so
48 functions should not be doing this. */
49
50 /* Alternative DATA arguments to make_opaque */
51 #define OPAQUE_CLEAR ((CONST void *) 0)
52 #define OPAQUE_UNINIT ((CONST void *) -1)
53
54 #define OPAQUE_SIZE(op) ((op)->size)
55 #define OPAQUE_DATA(op) ((void *) ((op)->data))
56 #define OPAQUE_MARKFUN(op) ((op)->markfun)
57 #define XOPAQUE_SIZE(op) OPAQUE_SIZE (XOPAQUE (op))
58 #define XOPAQUE_DATA(op) OPAQUE_DATA (XOPAQUE (op))
59 #define XOPAQUE_MARKFUN(op) OPAQUE_MARKFUN (XOPAQUE (op))
60
61 Lisp_Object make_opaque (size_t size, CONST void *data);
62
63 typedef struct Lisp_Opaque_Ptr
64 {
65 struct lcrecord_header header;
66 void *ptr;
67 } Lisp_Opaque_Ptr;
68
69 DECLARE_LRECORD (opaque_ptr, Lisp_Opaque_Ptr);
70 #define XOPAQUE_PTR(x) XRECORD (x, opaque_ptr, Lisp_Opaque_Ptr)
71 #define XSETOPAQUE_PTR(x, p) XSETRECORD (x, p, opaque_ptr)
72 #define OPAQUE_PTRP(x) RECORDP (x, opaque_ptr)
73
74 Lisp_Object make_opaque_ptr (void *val);
75 void free_opaque_ptr (Lisp_Object ptr);
76
77 #define get_opaque_ptr(op) (XOPAQUE_PTR (op)->ptr)
78 #define set_opaque_ptr(op, ptr_) (XOPAQUE_PTR (op)->ptr = (ptr_))
79
80 #endif /* _XEMACS_OPAQUE_H_ */