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0f2d19dd JB |
1 | /* classes: h_files */ |
2 | ||
61045190 DH |
3 | #ifndef SCM_GC_H |
4 | #define SCM_GC_H | |
8c494e99 | 5 | |
102dbb6f | 6 | /* Copyright (C) 1995,1996,1998,1999,2000,2001, 2002, 2003, 2004, 2006, 2008 Free Software Foundation, Inc. |
a00c95d9 | 7 | * |
73be1d9e | 8 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
9 | * modify it under the terms of the GNU Lesser General Public License |
10 | * as published by the Free Software Foundation; either version 3 of | |
11 | * the License, or (at your option) any later version. | |
a00c95d9 | 12 | * |
53befeb7 NJ |
13 | * This library is distributed in the hope that it will be useful, but |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
16 | * Lesser General Public License for more details. | |
a00c95d9 | 17 | * |
73be1d9e MV |
18 | * You should have received a copy of the GNU Lesser General Public |
19 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
21 | * 02110-1301 USA | |
73be1d9e | 22 | */ |
d3a6bc94 | 23 | |
0f2d19dd JB |
24 | \f |
25 | ||
b4309c3c | 26 | #include "libguile/__scm.h" |
2549a709 | 27 | |
9b3e180c | 28 | #include "libguile/hooks.h" |
9de87eea | 29 | #include "libguile/threads.h" |
9bc4701c | 30 | |
0f2d19dd JB |
31 | \f |
32 | ||
b17e0ac3 MV |
33 | /* Cell allocation and garbage collection work rouhgly in the |
34 | following manner: | |
35 | ||
36 | Each thread has a 'freelist', which is a list of available cells. | |
37 | (It actually has two freelists, one for single cells and one for | |
38 | double cells. Everything works analogous for double cells.) | |
39 | ||
40 | When a thread wants to allocate a cell and the freelist is empty, | |
41 | it refers to a global list of unswept 'cards'. A card is a small | |
42 | block of cells that are contigous in memory, together with the | |
43 | corresponding mark bits. A unswept card is one where the mark bits | |
44 | are set for cells that have been in use during the last global mark | |
45 | phase, but the unmarked cells of the card have not been scanned and | |
46 | freed yet. | |
47 | ||
48 | The thread takes one of the unswept cards and sweeps it, thereby | |
49 | building a new freelist that it then uses. Sweeping a card will | |
50 | call the smob free functions of unmarked cells, for example, and | |
51 | thus, these free functions can run at any time, in any thread. | |
52 | ||
53 | When there are no more unswept cards available, the thread performs | |
54 | a global garbage collection. For this, all other threads are | |
55 | stopped. A global mark is performed and all cards are put into the | |
56 | global list of unswept cards. Whennecessary, new cards are | |
57 | allocated and initialized at this time. The other threads are then | |
58 | started again. | |
59 | */ | |
60 | ||
228a24ef | 61 | typedef struct scm_t_cell |
2549a709 | 62 | { |
33c527ec MV |
63 | SCM word_0; |
64 | SCM word_1; | |
228a24ef | 65 | } scm_t_cell; |
2549a709 | 66 | |
c8a1bdc4 HWN |
67 | /* |
68 | CARDS | |
69 | ||
70 | A card is a small `page' of memory; it will be the unit for lazy | |
71 | sweeping, generations, etc. The first cell of a card contains a | |
33c527ec MV |
72 | pointer to the mark bitvector, so that we can find the bitvector |
73 | efficiently: we knock off some lowerorder bits. | |
c8a1bdc4 | 74 | |
33c527ec | 75 | The size on a 32 bit machine is 256 cells = 2kb. The card [XXX] |
c8a1bdc4 | 76 | */ |
2549a709 | 77 | |
2549a709 DH |
78 | |
79 | ||
33c527ec MV |
80 | /* Cray machines have pointers that are incremented once for each |
81 | * word, rather than each byte, the 3 most significant bits encode the | |
82 | * byte within the word. The following macros deal with this by | |
83 | * storing the native Cray pointers like the ones that looks like scm | |
84 | * expects. This is done for any pointers that point to a cell, | |
e618c9a3 | 85 | * pointers to scm_vector elts, functions, &c are not munged. |
2549a709 DH |
86 | */ |
87 | #ifdef _UNICOS | |
c8a1bdc4 | 88 | # define SCM2PTR(x) ((scm_t_cell *) (SCM_UNPACK (x) >> 3)) |
92c2555f | 89 | # define PTR2SCM(x) (SCM_PACK (((scm_t_bits) (x)) << 3)) |
2549a709 | 90 | #else |
c8a1bdc4 | 91 | # define SCM2PTR(x) ((scm_t_cell *) (SCM_UNPACK (x))) |
92c2555f | 92 | # define PTR2SCM(x) (SCM_PACK ((scm_t_bits) (x))) |
2549a709 DH |
93 | #endif /* def _UNICOS */ |
94 | ||
c8a1bdc4 | 95 | |
e618c9a3 | 96 | #define SCM_GC_CARD_N_HEADER_CELLS 1 |
f91f77e6 | 97 | #define SCM_GC_CARD_N_CELLS 256 |
b17e0ac3 | 98 | #define SCM_GC_SIZEOF_CARD SCM_GC_CARD_N_CELLS * sizeof (scm_t_cell) |
e618c9a3 | 99 | |
c8a1bdc4 | 100 | #define SCM_GC_CARD_BVEC(card) ((scm_t_c_bvec_long *) ((card)->word_0)) |
34d19ef6 | 101 | #define SCM_GC_SET_CARD_BVEC(card, bvec) \ |
33c527ec | 102 | ((card)->word_0 = (SCM) (bvec)) |
c014a02e | 103 | #define SCM_GC_GET_CARD_FLAGS(card) ((long) ((card)->word_1)) |
322ec19d | 104 | #define SCM_GC_SET_CARD_FLAGS(card, flags) \ |
33c527ec | 105 | ((card)->word_1 = (SCM) (flags)) |
e618c9a3 | 106 | |
33c527ec MV |
107 | #define SCM_GC_GET_CARD_FLAG(card, shift) \ |
108 | (SCM_GC_GET_CARD_FLAGS (card) & (1L << (shift))) | |
322ec19d | 109 | #define SCM_GC_SET_CARD_FLAG(card, shift) \ |
33c527ec | 110 | (SCM_GC_SET_CARD_FLAGS (card, SCM_GC_GET_CARD_FLAGS(card) | (1L << (shift)))) |
c8a1bdc4 | 111 | #define SCM_GC_CLEAR_CARD_FLAG(card, shift) \ |
33c527ec | 112 | (SCM_GC_SET_CARD_FLAGS (card, SCM_GC_GET_CARD_FLAGS(card) & ~(1L << (shift)))) |
e618c9a3 | 113 | |
1383773b HWN |
114 | /* |
115 | Remove card flags. They hamper lazy initialization, and aren't used | |
116 | anyways. | |
117 | */ | |
e618c9a3 ML |
118 | |
119 | /* card addressing. for efficiency, cards are *always* aligned to | |
120 | SCM_GC_CARD_SIZE. */ | |
121 | ||
33c527ec | 122 | #define SCM_GC_CARD_SIZE_MASK (SCM_GC_SIZEOF_CARD-1) |
e618c9a3 ML |
123 | #define SCM_GC_CARD_ADDR_MASK (~SCM_GC_CARD_SIZE_MASK) |
124 | ||
c8a1bdc4 | 125 | #define SCM_GC_CELL_CARD(x) ((scm_t_cell *) ((long) (x) & SCM_GC_CARD_ADDR_MASK)) |
c014a02e | 126 | #define SCM_GC_CELL_OFFSET(x) (((long) (x) & SCM_GC_CARD_SIZE_MASK) >> SCM_CELL_SIZE_SHIFT) |
e618c9a3 | 127 | #define SCM_GC_CELL_BVEC(x) SCM_GC_CARD_BVEC (SCM_GC_CELL_CARD (x)) |
c5b0618d | 128 | #define SCM_GC_SET_CELL_BVEC(x, bvec) SCM_GC_SET_CARD_BVEC (SCM_GC_CELL_CARD (x), bvec) |
e618c9a3 ML |
129 | #define SCM_GC_CELL_GET_BIT(x) SCM_C_BVEC_GET (SCM_GC_CELL_BVEC (x), SCM_GC_CELL_OFFSET (x)) |
130 | #define SCM_GC_CELL_SET_BIT(x) SCM_C_BVEC_SET (SCM_GC_CELL_BVEC (x), SCM_GC_CELL_OFFSET (x)) | |
c8a1bdc4 | 131 | #define SCM_GC_CELL_CLEAR_BIT(x) SCM_C_BVEC_CLEAR (SCM_GC_CELL_BVEC (x), SCM_GC_CELL_OFFSET (x)) |
e618c9a3 | 132 | |
c8a1bdc4 | 133 | #define SCM_GC_CARD_UP(x) SCM_GC_CELL_CARD ((char *) (x) + SCM_GC_SIZEOF_CARD - 1) |
e618c9a3 ML |
134 | #define SCM_GC_CARD_DOWN SCM_GC_CELL_CARD |
135 | ||
136 | /* low level bit banging aids */ | |
c8a1bdc4 | 137 | typedef unsigned long scm_t_c_bvec_long; |
e618c9a3 | 138 | |
48c046bc | 139 | #if (SCM_SIZEOF_UNSIGNED_LONG == 8) |
c8a1bdc4 | 140 | # define SCM_C_BVEC_LONG_BITS 64 |
e618c9a3 ML |
141 | # define SCM_C_BVEC_OFFSET_SHIFT 6 |
142 | # define SCM_C_BVEC_POS_MASK 63 | |
143 | # define SCM_CELL_SIZE_SHIFT 4 | |
144 | #else | |
c8a1bdc4 | 145 | # define SCM_C_BVEC_LONG_BITS 32 |
e618c9a3 ML |
146 | # define SCM_C_BVEC_OFFSET_SHIFT 5 |
147 | # define SCM_C_BVEC_POS_MASK 31 | |
148 | # define SCM_CELL_SIZE_SHIFT 3 | |
149 | #endif | |
150 | ||
151 | #define SCM_C_BVEC_OFFSET(pos) (pos >> SCM_C_BVEC_OFFSET_SHIFT) | |
152 | ||
153 | #define SCM_C_BVEC_GET(bvec, pos) (bvec[SCM_C_BVEC_OFFSET (pos)] & (1L << (pos & SCM_C_BVEC_POS_MASK))) | |
154 | #define SCM_C_BVEC_SET(bvec, pos) (bvec[SCM_C_BVEC_OFFSET (pos)] |= (1L << (pos & SCM_C_BVEC_POS_MASK))) | |
c8a1bdc4 | 155 | #define SCM_C_BVEC_CLEAR(bvec, pos) (bvec[SCM_C_BVEC_OFFSET (pos)] &= ~(1L << (pos & SCM_C_BVEC_POS_MASK))) |
e618c9a3 ML |
156 | |
157 | /* testing and changing GC marks */ | |
c8a1bdc4 | 158 | #define SCM_GC_MARK_P(x) SCM_GC_CELL_GET_BIT (x) |
d09752ff | 159 | |
7ddb9baf HWN |
160 | SCM_INTERNAL void scm_i_ensure_marking(void); |
161 | ||
162 | #if (SCM_DEBUG_MARKING_API == 1) | |
163 | #define SCM_I_ENSURE_MARKING scm_i_ensure_marking(), | |
164 | #else | |
165 | #define SCM_I_ENSURE_MARKING | |
166 | #endif | |
167 | ||
168 | #define SCM_SET_GC_MARK(x) SCM_I_ENSURE_MARKING SCM_GC_CELL_SET_BIT (x) | |
169 | #define SCM_CLEAR_GC_MARK(x) SCM_I_ENSURE_MARKING SCM_GC_CELL_CLEAR_BIT (x) | |
1fc8902f DH |
170 | |
171 | /* Low level cell data accessing macros. These macros should only be used | |
172 | * from within code related to garbage collection issues, since they will | |
173 | * never check the cells they are applied to - not even if guile is compiled | |
174 | * in debug mode. In particular these macros will even work for free cells, | |
175 | * which should never be encountered by user code. */ | |
176 | ||
33c527ec MV |
177 | #define SCM_GC_CELL_OBJECT(x, n) (((SCM *)SCM2PTR (x)) [n]) |
178 | #define SCM_GC_CELL_WORD(x, n) (SCM_UNPACK (SCM_GC_CELL_OBJECT ((x), (n)))) | |
179 | ||
180 | #define SCM_GC_SET_CELL_OBJECT(x, n, v) ((((SCM *)SCM2PTR (x)) [n]) = (v)) | |
181 | #define SCM_GC_SET_CELL_WORD(x, n, v) \ | |
182 | (SCM_GC_SET_CELL_OBJECT ((x), (n), SCM_PACK (v))) | |
183 | ||
184 | #define SCM_GC_CELL_TYPE(x) (SCM_GC_CELL_OBJECT ((x), 0)) | |
1fc8902f DH |
185 | |
186 | ||
187 | /* Except for the garbage collector, no part of guile should ever run over a | |
188 | * free cell. Thus, if guile is compiled in debug mode the SCM_CELL_* and | |
189 | * SCM_SET_CELL_* macros below report an error if they are applied to a free | |
190 | * cell. Some other plausibility checks are also performed. However, if | |
191 | * guile is not compiled in debug mode, there won't be any time penalty at all | |
192 | * when using these macros. */ | |
2549a709 | 193 | |
406c7d90 DH |
194 | #if (SCM_DEBUG_CELL_ACCESSES == 1) |
195 | # define SCM_VALIDATE_CELL(cell, expr) (scm_assert_cell_valid (cell), (expr)) | |
708cb87c | 196 | #else |
61045190 | 197 | # define SCM_VALIDATE_CELL(cell, expr) (expr) |
708cb87c | 198 | #endif |
46d53380 | 199 | |
f706a58b | 200 | #define SCM_CELL_WORD(x, n) \ |
1fc8902f | 201 | SCM_VALIDATE_CELL ((x), SCM_GC_CELL_WORD ((x), (n))) |
33c527ec MV |
202 | #define SCM_CELL_WORD_0(x) SCM_CELL_WORD ((x), 0) |
203 | #define SCM_CELL_WORD_1(x) SCM_CELL_WORD ((x), 1) | |
204 | #define SCM_CELL_WORD_2(x) SCM_CELL_WORD ((x), 2) | |
205 | #define SCM_CELL_WORD_3(x) SCM_CELL_WORD ((x), 3) | |
2549a709 | 206 | |
f706a58b | 207 | #define SCM_CELL_OBJECT(x, n) \ |
1fc8902f | 208 | SCM_VALIDATE_CELL ((x), SCM_GC_CELL_OBJECT ((x), (n))) |
33c527ec MV |
209 | #define SCM_CELL_OBJECT_0(x) SCM_CELL_OBJECT ((x), 0) |
210 | #define SCM_CELL_OBJECT_1(x) SCM_CELL_OBJECT ((x), 1) | |
211 | #define SCM_CELL_OBJECT_2(x) SCM_CELL_OBJECT ((x), 2) | |
212 | #define SCM_CELL_OBJECT_3(x) SCM_CELL_OBJECT ((x), 3) | |
2549a709 | 213 | |
f706a58b | 214 | #define SCM_SET_CELL_WORD(x, n, v) \ |
1fc8902f | 215 | SCM_VALIDATE_CELL ((x), SCM_GC_SET_CELL_WORD ((x), (n), (v))) |
33c527ec MV |
216 | #define SCM_SET_CELL_WORD_0(x, v) SCM_SET_CELL_WORD ((x), 0, (v)) |
217 | #define SCM_SET_CELL_WORD_1(x, v) SCM_SET_CELL_WORD ((x), 1, (v)) | |
218 | #define SCM_SET_CELL_WORD_2(x, v) SCM_SET_CELL_WORD ((x), 2, (v)) | |
219 | #define SCM_SET_CELL_WORD_3(x, v) SCM_SET_CELL_WORD ((x), 3, (v)) | |
2549a709 | 220 | |
f706a58b | 221 | #define SCM_SET_CELL_OBJECT(x, n, v) \ |
1fc8902f | 222 | SCM_VALIDATE_CELL ((x), SCM_GC_SET_CELL_OBJECT ((x), (n), (v))) |
33c527ec MV |
223 | #define SCM_SET_CELL_OBJECT_0(x, v) SCM_SET_CELL_OBJECT ((x), 0, (v)) |
224 | #define SCM_SET_CELL_OBJECT_1(x, v) SCM_SET_CELL_OBJECT ((x), 1, (v)) | |
225 | #define SCM_SET_CELL_OBJECT_2(x, v) SCM_SET_CELL_OBJECT ((x), 2, (v)) | |
226 | #define SCM_SET_CELL_OBJECT_3(x, v) SCM_SET_CELL_OBJECT ((x), 3, (v)) | |
2549a709 | 227 | |
b17e0ac3 MV |
228 | #define SCM_CELL_OBJECT_LOC(x, n) (SCM_VALIDATE_CELL((x), &SCM_GC_CELL_OBJECT ((x), (n)))) |
229 | #define SCM_CARLOC(x) (SCM_CELL_OBJECT_LOC ((x), 0)) | |
230 | #define SCM_CDRLOC(x) (SCM_CELL_OBJECT_LOC ((x), 1)) | |
231 | ||
2549a709 | 232 | #define SCM_CELL_TYPE(x) SCM_CELL_WORD_0 (x) |
33c527ec | 233 | #define SCM_SET_CELL_TYPE(x, t) SCM_SET_CELL_WORD_0 ((x), (t)) |
2549a709 | 234 | |
1fc8902f DH |
235 | /* Freelists consist of linked cells where the type entry holds the value |
236 | * scm_tc_free_cell and the second entry holds a pointer to the next cell of | |
237 | * the freelist. Due to this structure, freelist cells are not cons cells | |
238 | * and thus may not be accessed using SCM_CAR and SCM_CDR. */ | |
61045190 | 239 | |
1fc8902f DH |
240 | #define SCM_FREE_CELL_CDR(x) \ |
241 | (SCM_GC_CELL_OBJECT ((x), 1)) | |
242 | #define SCM_SET_FREE_CELL_CDR(x, v) \ | |
243 | (SCM_GC_SET_CELL_OBJECT ((x), 1, (v))) | |
61045190 | 244 | |
61045190 | 245 | #if (SCM_DEBUG_CELL_ACCESSES == 1) |
eab1b259 HWN |
246 | /* Set this to != 0 if every cell that is accessed shall be checked: |
247 | */ | |
248 | SCM_API int scm_debug_cell_accesses_p; | |
249 | SCM_API int scm_expensive_debug_cell_accesses_p; | |
250 | SCM_API int scm_debug_cells_gc_interval ; | |
1e71eafb | 251 | void scm_i_expensive_validation_check (SCM cell); |
61045190 DH |
252 | #endif |
253 | ||
102dbb6f | 254 | SCM_INTERNAL scm_i_pthread_mutex_t scm_i_gc_admin_mutex; |
eb01cb64 | 255 | |
b17e0ac3 | 256 | #define scm_gc_running_p (SCM_I_CURRENT_THREAD->gc_running_p) |
102dbb6f | 257 | SCM_INTERNAL scm_i_pthread_mutex_t scm_i_sweep_mutex; |
b17e0ac3 | 258 | |
9a5fa6e9 NJ |
259 | #ifdef __ia64__ |
260 | void *scm_ia64_register_backing_store_base (void); | |
261 | void *scm_ia64_ar_bsp (const void *); | |
262 | #endif | |
263 | ||
0f2d19dd JB |
264 | \f |
265 | ||
c8a1bdc4 | 266 | #if (SCM_ENABLE_DEPRECATED == 1) |
33b001fd MV |
267 | SCM_API size_t scm_default_init_heap_size_1; |
268 | SCM_API int scm_default_min_yield_1; | |
269 | SCM_API size_t scm_default_init_heap_size_2; | |
270 | SCM_API int scm_default_min_yield_2; | |
271 | SCM_API size_t scm_default_max_segment_size; | |
c8a1bdc4 HWN |
272 | #else |
273 | #define scm_default_init_heap_size_1 deprecated | |
274 | #define scm_default_min_yield_1 deprecated | |
275 | #define scm_default_init_heap_size_2 deprecated | |
276 | #define scm_default_min_yield_2 deprecated | |
277 | #define scm_default_max_segment_size deprecated | |
278 | #endif | |
279 | ||
33b001fd MV |
280 | |
281 | SCM_API size_t scm_max_segment_size; | |
c8a1bdc4 | 282 | |
9de87eea MV |
283 | #define SCM_SET_FREELIST_LOC(key,ptr) scm_i_pthread_setspecific ((key), (ptr)) |
284 | #define SCM_FREELIST_LOC(key) ((SCM *) scm_i_pthread_getspecific (key)) | |
285 | SCM_API scm_i_pthread_key_t scm_i_freelist; | |
286 | SCM_API scm_i_pthread_key_t scm_i_freelist2; | |
2e945bcc SJ |
287 | SCM_API struct scm_t_cell_type_statistics scm_i_master_freelist; |
288 | SCM_API struct scm_t_cell_type_statistics scm_i_master_freelist2; | |
eab1b259 | 289 | |
33b001fd | 290 | SCM_API unsigned long scm_gc_malloc_collected; |
c2cbcc57 | 291 | SCM_API int scm_gc_malloc_yield_percentage; |
33b001fd MV |
292 | SCM_API unsigned long scm_mallocated; |
293 | SCM_API unsigned long scm_mtrigger; | |
294 | ||
295 | SCM_API SCM scm_after_gc_hook; | |
296 | ||
297 | SCM_API scm_t_c_hook scm_before_gc_c_hook; | |
298 | SCM_API scm_t_c_hook scm_before_mark_c_hook; | |
299 | SCM_API scm_t_c_hook scm_before_sweep_c_hook; | |
300 | SCM_API scm_t_c_hook scm_after_sweep_c_hook; | |
301 | SCM_API scm_t_c_hook scm_after_gc_c_hook; | |
9b3e180c | 302 | |
bb2c57fa | 303 | #if defined (GUILE_DEBUG) || defined (GUILE_DEBUG_FREELIST) |
2e945bcc SJ |
304 | #if (SCM_ENABLE_DEPRECATED == 1) |
305 | SCM scm_map_free_list (void); | |
306 | #else | |
c8a1bdc4 HWN |
307 | #define scm_map_free_list deprecated |
308 | #define scm_free_list_length deprecated | |
bb2c57fa | 309 | #endif |
2e945bcc | 310 | #endif |
c8a1bdc4 HWN |
311 | |
312 | #if (SCM_ENABLE_DEPRECATED == 1) && defined (GUILE_DEBUG_FREELIST) | |
33b001fd | 313 | SCM_API SCM scm_gc_set_debug_check_freelist_x (SCM flag); |
88256b2e | 314 | #endif |
0f2d19dd | 315 | \f |
0f2d19dd | 316 | |
61045190 | 317 | #if (SCM_DEBUG_CELL_ACCESSES == 1) |
33b001fd | 318 | SCM_API void scm_assert_cell_valid (SCM); |
61045190 | 319 | #endif |
c8a1bdc4 HWN |
320 | |
321 | SCM_API SCM scm_set_debug_cell_accesses_x (SCM flag); | |
322 | ||
323 | ||
33b001fd | 324 | SCM_API SCM scm_object_address (SCM obj); |
33b001fd | 325 | SCM_API SCM scm_gc_stats (void); |
1367aa5e | 326 | SCM_API SCM scm_gc_live_object_stats (void); |
33b001fd | 327 | SCM_API SCM scm_gc (void); |
c8a1bdc4 HWN |
328 | SCM_API void scm_gc_for_alloc (struct scm_t_cell_type_statistics *freelist); |
329 | SCM_API SCM scm_gc_for_newcell (struct scm_t_cell_type_statistics *master, SCM *freelist); | |
102dbb6f | 330 | SCM_INTERNAL void scm_i_gc (const char *what); |
33b001fd MV |
331 | SCM_API void scm_gc_mark (SCM p); |
332 | SCM_API void scm_gc_mark_dependencies (SCM p); | |
333 | SCM_API void scm_mark_locations (SCM_STACKITEM x[], unsigned long n); | |
c8a1bdc4 | 334 | SCM_API int scm_in_heap_p (SCM value); |
33b001fd | 335 | SCM_API void scm_gc_sweep (void); |
4c9419ac MV |
336 | |
337 | SCM_API void *scm_malloc (size_t size); | |
ba1b2226 | 338 | SCM_API void *scm_calloc (size_t size); |
4c9419ac MV |
339 | SCM_API void *scm_realloc (void *mem, size_t size); |
340 | SCM_API char *scm_strdup (const char *str); | |
341 | SCM_API char *scm_strndup (const char *str, size_t n); | |
342 | SCM_API void scm_gc_register_collectable_memory (void *mem, size_t size, | |
343 | const char *what); | |
344 | SCM_API void scm_gc_unregister_collectable_memory (void *mem, size_t size, | |
345 | const char *what); | |
39e8f371 | 346 | SCM_API void *scm_gc_calloc (size_t size, const char *what); |
4c9419ac MV |
347 | SCM_API void *scm_gc_malloc (size_t size, const char *what); |
348 | SCM_API void *scm_gc_realloc (void *mem, size_t old_size, | |
349 | size_t new_size, const char *what); | |
350 | SCM_API void scm_gc_free (void *mem, size_t size, const char *what); | |
351 | SCM_API char *scm_gc_strdup (const char *str, const char *what); | |
352 | SCM_API char *scm_gc_strndup (const char *str, size_t n, const char *what); | |
353 | ||
33b001fd MV |
354 | SCM_API void scm_remember_upto_here_1 (SCM obj); |
355 | SCM_API void scm_remember_upto_here_2 (SCM obj1, SCM obj2); | |
356 | SCM_API void scm_remember_upto_here (SCM obj1, ...); | |
aca3618f | 357 | |
c1ffdc6a KR |
358 | /* In GCC we can force a reference to an SCM by making it an input to an |
359 | empty asm. This avoids the code size and slowdown of an actual function | |
360 | call. Unfortunately there doesn't seem to be any way to do the varargs | |
361 | scm_remember_upto_here like this. | |
362 | ||
363 | __volatile__ ensures nothing will be moved across the asm, and it won't | |
364 | be optimized away (or only if proved unreachable). Constraint "g" can be | |
365 | used on all processors and allows any memory or general register (or | |
366 | immediate) operand. The actual asm syntax doesn't matter, we don't want | |
367 | to use it, just ensure the operand is still alive. See "Extended Asm" in | |
368 | the GCC manual for more. */ | |
aca3618f KR |
369 | |
370 | #ifdef __GNUC__ | |
371 | #define scm_remember_upto_here_1(x) \ | |
372 | do { \ | |
373 | __asm__ __volatile__ ("" : : "g" (x)); \ | |
374 | } while (0) | |
375 | #define scm_remember_upto_here_2(x, y) \ | |
376 | do { \ | |
377 | scm_remember_upto_here_1 (x); \ | |
378 | scm_remember_upto_here_1 (y); \ | |
379 | } while (0) | |
380 | #endif | |
381 | ||
33b001fd MV |
382 | SCM_API SCM scm_return_first (SCM elt, ...); |
383 | SCM_API int scm_return_first_int (int x, ...); | |
384 | SCM_API SCM scm_permanent_object (SCM obj); | |
385 | SCM_API SCM scm_gc_protect_object (SCM obj); | |
386 | SCM_API SCM scm_gc_unprotect_object (SCM obj); | |
387 | SCM_API void scm_gc_register_root (SCM *p); | |
388 | SCM_API void scm_gc_unregister_root (SCM *p); | |
389 | SCM_API void scm_gc_register_roots (SCM *b, unsigned long n); | |
390 | SCM_API void scm_gc_unregister_roots (SCM *b, unsigned long n); | |
c35738c1 | 391 | SCM_API void scm_storage_prehistory (void); |
33b001fd MV |
392 | SCM_API int scm_init_storage (void); |
393 | SCM_API void *scm_get_stack_base (void); | |
102dbb6f | 394 | SCM_INTERNAL void scm_init_gc (void); |
d1ca2c64 | 395 | |
d678e25c MV |
396 | #if SCM_ENABLE_DEPRECATED == 1 |
397 | ||
398 | SCM_API SCM scm_deprecated_newcell (void); | |
399 | SCM_API SCM scm_deprecated_newcell2 (void); | |
400 | ||
401 | #define SCM_NEWCELL(_into) \ | |
402 | do { _into = scm_deprecated_newcell (); } while (0) | |
403 | #define SCM_NEWCELL2(_into) \ | |
404 | do { _into = scm_deprecated_newcell2 (); } while (0) | |
405 | ||
539b08a4 MV |
406 | SCM_API void * scm_must_malloc (size_t len, const char *what); |
407 | SCM_API void * scm_must_realloc (void *where, | |
408 | size_t olen, size_t len, | |
409 | const char *what); | |
410 | SCM_API char *scm_must_strdup (const char *str); | |
411 | SCM_API char *scm_must_strndup (const char *str, size_t n); | |
412 | SCM_API void scm_done_malloc (long size); | |
413 | SCM_API void scm_done_free (long size); | |
414 | SCM_API void scm_must_free (void *obj); | |
415 | ||
d678e25c MV |
416 | #endif |
417 | ||
61045190 | 418 | #endif /* SCM_GC_H */ |
89e00824 ML |
419 | |
420 | /* | |
421 | Local Variables: | |
422 | c-file-style: "gnu" | |
423 | End: | |
424 | */ |