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ac99cb0c KN |
1 | /* Copyright (C) 2001 Free Software Foundation, Inc. |
2 | * | |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, | |
16 | * Boston, MA 02111-1307 USA | |
17 | * | |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
40 | * If you do not wish that, delete this exception notice. */ | |
41 | ||
42 | #include <string.h> | |
43 | #include "frames.h" | |
44 | ||
45 | \f | |
f9e8c09d | 46 | scm_t_bits scm_tc16_heap_frame; |
ac99cb0c KN |
47 | |
48 | SCM | |
49 | scm_c_make_heap_frame (SCM *fp) | |
50 | { | |
af988bbf KN |
51 | SCM frame; |
52 | SCM *lower = SCM_FRAME_LOWER_ADDRESS (fp); | |
53 | SCM *upper = SCM_FRAME_UPPER_ADDRESS (fp); | |
54 | size_t size = sizeof (SCM) * (upper - lower + 1); | |
d8eeb67c LC |
55 | SCM *p = scm_gc_malloc (size, "frame"); |
56 | ||
af988bbf KN |
57 | SCM_NEWSMOB (frame, scm_tc16_heap_frame, p); |
58 | p[0] = frame; /* self link */ | |
59 | memcpy (p + 1, lower, size - sizeof (SCM)); | |
d8eeb67c | 60 | |
af988bbf | 61 | return frame; |
ac99cb0c KN |
62 | } |
63 | ||
64 | static SCM | |
65 | heap_frame_mark (SCM obj) | |
66 | { | |
af988bbf KN |
67 | SCM *sp; |
68 | SCM *fp = SCM_HEAP_FRAME_POINTER (obj); | |
69 | SCM *limit = &SCM_FRAME_HEAP_LINK (fp); | |
70 | ||
71 | for (sp = SCM_FRAME_LOWER_ADDRESS (fp); sp <= limit; sp++) | |
72 | if (SCM_NIMP (*sp)) | |
73 | scm_gc_mark (*sp); | |
74 | ||
75 | return SCM_BOOL_F; | |
76 | } | |
77 | ||
78 | static scm_sizet | |
79 | heap_frame_free (SCM obj) | |
80 | { | |
81 | SCM *fp = SCM_HEAP_FRAME_POINTER (obj); | |
82 | SCM *lower = SCM_FRAME_LOWER_ADDRESS (fp); | |
83 | SCM *upper = SCM_FRAME_UPPER_ADDRESS (fp); | |
84 | size_t size = sizeof (SCM) * (upper - lower + 1); | |
d8eeb67c LC |
85 | |
86 | scm_gc_free (SCM_HEAP_FRAME_DATA (obj), size, "frame"); | |
87 | ||
88 | return 0; | |
ac99cb0c KN |
89 | } |
90 | ||
91 | /* Scheme interface */ | |
92 | ||
93 | SCM_DEFINE (scm_frame_p, "frame?", 1, 0, 0, | |
94 | (SCM obj), | |
95 | "") | |
96 | #define FUNC_NAME s_scm_frame_p | |
97 | { | |
98 | return SCM_BOOL (SCM_HEAP_FRAME_P (obj)); | |
99 | } | |
100 | #undef FUNC_NAME | |
101 | ||
102 | SCM_DEFINE (scm_frame_program, "frame-program", 1, 0, 0, | |
103 | (SCM frame), | |
104 | "") | |
105 | #define FUNC_NAME s_scm_frame_program | |
106 | { | |
107 | SCM_VALIDATE_HEAP_FRAME (1, frame); | |
af988bbf | 108 | return SCM_FRAME_PROGRAM (SCM_HEAP_FRAME_POINTER (frame)); |
ac99cb0c KN |
109 | } |
110 | #undef FUNC_NAME | |
111 | ||
af988bbf KN |
112 | SCM_DEFINE (scm_frame_local_ref, "frame-local-ref", 2, 0, 0, |
113 | (SCM frame, SCM index), | |
ac99cb0c | 114 | "") |
af988bbf | 115 | #define FUNC_NAME s_scm_frame_local_ref |
ac99cb0c | 116 | { |
af988bbf | 117 | SCM_VALIDATE_HEAP_FRAME (1, frame); |
62082959 | 118 | SCM_MAKE_VALIDATE (2, index, I_INUMP); /* FIXME: Check the range! */ |
af988bbf | 119 | return SCM_FRAME_VARIABLE (SCM_HEAP_FRAME_POINTER (frame), |
2d80426a | 120 | SCM_I_INUM (index)); |
af988bbf KN |
121 | } |
122 | #undef FUNC_NAME | |
ac99cb0c | 123 | |
af988bbf KN |
124 | SCM_DEFINE (scm_frame_local_set_x, "frame-local-set!", 3, 0, 0, |
125 | (SCM frame, SCM index, SCM val), | |
126 | "") | |
127 | #define FUNC_NAME s_scm_frame_local_set_x | |
128 | { | |
ac99cb0c | 129 | SCM_VALIDATE_HEAP_FRAME (1, frame); |
62082959 | 130 | SCM_MAKE_VALIDATE (2, index, I_INUMP); /* FIXME: Check the range! */ |
d8eeb67c | 131 | SCM_FRAME_VARIABLE (SCM_HEAP_FRAME_POINTER (frame), |
2d80426a | 132 | SCM_I_INUM (index)) = val; |
af988bbf | 133 | return SCM_UNSPECIFIED; |
ac99cb0c KN |
134 | } |
135 | #undef FUNC_NAME | |
136 | ||
137 | SCM_DEFINE (scm_frame_return_address, "frame-return-address", 1, 0, 0, | |
138 | (SCM frame), | |
139 | "") | |
140 | #define FUNC_NAME s_scm_frame_return_address | |
141 | { | |
142 | SCM_VALIDATE_HEAP_FRAME (1, frame); | |
b6368dbb LC |
143 | return scm_from_ulong ((unsigned long) |
144 | (SCM_FRAME_RETURN_ADDRESS | |
145 | (SCM_HEAP_FRAME_POINTER (frame)))); | |
ac99cb0c KN |
146 | } |
147 | #undef FUNC_NAME | |
148 | ||
149 | SCM_DEFINE (scm_frame_dynamic_link, "frame-dynamic-link", 1, 0, 0, | |
150 | (SCM frame), | |
151 | "") | |
152 | #define FUNC_NAME s_scm_frame_dynamic_link | |
153 | { | |
ac99cb0c | 154 | SCM_VALIDATE_HEAP_FRAME (1, frame); |
af988bbf | 155 | return SCM_FRAME_HEAP_LINK (SCM_HEAP_FRAME_POINTER (frame)); |
ac99cb0c KN |
156 | } |
157 | #undef FUNC_NAME | |
158 | ||
159 | SCM_DEFINE (scm_frame_external_link, "frame-external-link", 1, 0, 0, | |
160 | (SCM frame), | |
161 | "") | |
162 | #define FUNC_NAME s_scm_frame_external_link | |
163 | { | |
ac99cb0c | 164 | SCM_VALIDATE_HEAP_FRAME (1, frame); |
af988bbf | 165 | return SCM_FRAME_EXTERNAL_LINK (SCM_HEAP_FRAME_POINTER (frame)); |
ac99cb0c KN |
166 | } |
167 | #undef FUNC_NAME | |
168 | ||
169 | \f | |
170 | void | |
171 | scm_init_frames (void) | |
172 | { | |
af988bbf | 173 | scm_tc16_heap_frame = scm_make_smob_type ("frame", 0); |
ac99cb0c | 174 | scm_set_smob_mark (scm_tc16_heap_frame, heap_frame_mark); |
af988bbf | 175 | scm_set_smob_free (scm_tc16_heap_frame, heap_frame_free); |
ac99cb0c KN |
176 | |
177 | #ifndef SCM_MAGIC_SNARFER | |
178 | #include "frames.x" | |
179 | #endif | |
180 | } | |
181 | ||
182 | /* | |
183 | Local Variables: | |
184 | c-file-style: "gnu" | |
185 | End: | |
186 | */ |