1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
/*
* Copyright © 2016 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#include "ao_lisp.h"
#if 0
#define DBG(...) printf(__VA_ARGS__)
#else
#define DBG(...)
#endif
static inline int
frame_num_size(int num)
{
return sizeof (struct ao_lisp_frame) + num * sizeof (struct ao_lisp_val);
}
static int
frame_size(void *addr)
{
struct ao_lisp_frame *frame = addr;
return frame_num_size(frame->num);
}
#define OFFSET(a) ((int) ((uint8_t *) (ao_lisp_ref(a)) - ao_lisp_const))
static void
frame_mark(void *addr)
{
struct ao_lisp_frame *frame = addr;
int f;
for (;;) {
DBG("frame mark %p\n", frame);
if (!AO_LISP_IS_POOL(frame))
break;
for (f = 0; f < frame->num; f++) {
struct ao_lisp_val *v = &frame->vals[f];
ao_lisp_poly_mark(v->val, 0);
DBG ("\tframe mark atom %s %d val %d at %d\n",
ao_lisp_poly_atom(v->atom)->name,
OFFSET(v->atom), OFFSET(v->val), f);
}
frame = ao_lisp_poly_frame(frame->next);
DBG("frame next %p\n", frame);
if (!frame)
break;
if (ao_lisp_mark_memory(frame, frame_size(frame)))
break;
}
}
static void
frame_move(void *addr)
{
struct ao_lisp_frame *frame = addr;
int f;
for (;;) {
struct ao_lisp_frame *next;
int ret;
DBG("frame move %p\n", frame);
if (!AO_LISP_IS_POOL(frame))
break;
for (f = 0; f < frame->num; f++) {
struct ao_lisp_val *v = &frame->vals[f];
ao_lisp_poly_move(&v->atom, 0);
DBG("moved atom %s\n", ao_lisp_poly_atom(v->atom)->name);
ao_lisp_poly_move(&v->val, 0);
}
next = ao_lisp_poly_frame(frame->next);
ret = 1;
if (next)
ret = ao_lisp_move_memory((void **) &next, frame_size(next));
if (next != ao_lisp_poly_frame(frame->next))
frame->next = ao_lisp_frame_poly(next);
if (ret)
break;
frame = next;
}
}
const struct ao_lisp_type ao_lisp_frame_type = {
.mark = frame_mark,
.size = frame_size,
.move = frame_move
};
void
ao_lisp_frame_print(ao_poly p)
{
struct ao_lisp_frame *frame = ao_lisp_poly_frame(p);
int f;
printf ("{");
if (frame) {
for (f = 0; f < frame->num; f++) {
if (f != 0)
printf(", ");
ao_lisp_poly_print(frame->vals[f].atom);
printf(" = ");
ao_lisp_poly_print(frame->vals[f].val);
}
if (frame->next)
ao_lisp_poly_print(frame->next);
}
printf("}");
}
ao_poly *
ao_lisp_frame_ref(struct ao_lisp_frame *frame, ao_poly atom)
{
int f;
for (f = 0; f < frame->num; f++)
if (frame->vals[f].atom == atom)
return &frame->vals[f].val;
return NULL;
}
int
ao_lisp_frame_set(struct ao_lisp_frame *frame, ao_poly atom, ao_poly val)
{
while (frame) {
if (!AO_LISP_IS_CONST(frame)) {
ao_poly *ref = ao_lisp_frame_ref(frame, atom);
if (ref) {
*ref = val;
return 1;
}
}
frame = ao_lisp_poly_frame(frame->next);
}
return 0;
}
ao_poly
ao_lisp_frame_get(struct ao_lisp_frame *frame, ao_poly atom)
{
while (frame) {
ao_poly *ref = ao_lisp_frame_ref(frame, atom);
if (ref)
return *ref;
frame = ao_lisp_poly_frame(frame->next);
}
return AO_LISP_NIL;
}
struct ao_lisp_frame *
ao_lisp_frame_new(int num)
{
struct ao_lisp_frame *frame = ao_lisp_alloc(frame_num_size(num));
if (!frame)
return NULL;
frame->type = AO_LISP_FRAME;
frame->num = num;
frame->next = AO_LISP_NIL;
memset(frame->vals, '\0', num * sizeof (struct ao_lisp_val));
return frame;
}
static struct ao_lisp_frame *
ao_lisp_frame_realloc(struct ao_lisp_frame **frame_ref, int new_num)
{
struct ao_lisp_frame *frame = *frame_ref;
struct ao_lisp_frame *new;
int copy;
if (new_num == frame->num)
return frame;
new = ao_lisp_frame_new(new_num);
if (!new)
return NULL;
/*
* Re-fetch the frame as it may have moved
* during the allocation
*/
frame = *frame_ref;
copy = new_num;
if (copy > frame->num)
copy = frame->num;
memcpy(new->vals, frame->vals, copy * sizeof (struct ao_lisp_val));
new->next = frame->next;
return new;
}
int
ao_lisp_frame_add(struct ao_lisp_frame **frame_ref, ao_poly atom, ao_poly val)
{
struct ao_lisp_frame *frame = *frame_ref;
ao_poly *ref = frame ? ao_lisp_frame_ref(frame, atom) : NULL;
if (!ref) {
int f;
ao_lisp_root_poly_add(&atom);
ao_lisp_root_poly_add(&val);
if (frame) {
f = frame->num;
frame = ao_lisp_frame_realloc(frame_ref, f + 1);
} else {
f = 0;
frame = ao_lisp_frame_new(1);
}
ao_lisp_root_clear(&atom);
ao_lisp_root_clear(&val);
if (!frame)
return 0;
*frame_ref = frame;
DBG ("add atom %s %d, val %d at %d\n", ao_lisp_poly_atom(atom)->name, OFFSET(atom), OFFSET(val), f);
frame->vals[f].atom = atom;
ref = &frame->vals[f].val;
}
*ref = val;
return 1;
}
|
