Commit | Line | Data |
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7146af97 | 1 | /* Storage allocation and gc for GNU Emacs Lisp interpreter. |
4a2f9c6a RS |
2 | Copyright (C) 1985, 86, 88, 93, 94, 95, 97, 1998 |
3 | Free Software Foundation, Inc. | |
7146af97 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
7c299e7a | 9 | the Free Software Foundation; either version 2, or (at your option) |
7146af97 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
7146af97 | 21 | |
290c8f1e | 22 | /* Note that this declares bzero on OSF/1. How dumb. */ |
cf026b25 | 23 | #include <signal.h> |
7146af97 | 24 | |
18160b98 | 25 | #include <config.h> |
7146af97 | 26 | #include "lisp.h" |
d5e35230 | 27 | #include "intervals.h" |
4c0be5f4 | 28 | #include "puresize.h" |
7146af97 JB |
29 | #ifndef standalone |
30 | #include "buffer.h" | |
31 | #include "window.h" | |
502b9b64 | 32 | #include "frame.h" |
9ac0d9e0 | 33 | #include "blockinput.h" |
077d751f | 34 | #include "keyboard.h" |
e54daa22 | 35 | #include "charset.h" |
7146af97 JB |
36 | #endif |
37 | ||
e065a56e JB |
38 | #include "syssignal.h" |
39 | ||
ee1eea5c KH |
40 | extern char *sbrk (); |
41 | ||
d1658221 RS |
42 | #ifdef DOUG_LEA_MALLOC |
43 | #include <malloc.h> | |
44 | #define __malloc_size_t int | |
45 | #else | |
276cbe5a RS |
46 | /* The following come from gmalloc.c. */ |
47 | ||
48 | #if defined (__STDC__) && __STDC__ | |
49 | #include <stddef.h> | |
50 | #define __malloc_size_t size_t | |
51 | #else | |
52 | #define __malloc_size_t unsigned int | |
53 | #endif | |
54 | extern __malloc_size_t _bytes_used; | |
55 | extern int __malloc_extra_blocks; | |
d1658221 | 56 | #endif /* !defined(DOUG_LEA_MALLOC) */ |
276cbe5a | 57 | |
7146af97 | 58 | #define max(A,B) ((A) > (B) ? (A) : (B)) |
b580578b | 59 | #define min(A,B) ((A) < (B) ? (A) : (B)) |
7146af97 JB |
60 | |
61 | /* Macro to verify that storage intended for Lisp objects is not | |
62 | out of range to fit in the space for a pointer. | |
63 | ADDRESS is the start of the block, and SIZE | |
64 | is the amount of space within which objects can start. */ | |
65 | #define VALIDATE_LISP_STORAGE(address, size) \ | |
66 | do \ | |
67 | { \ | |
68 | Lisp_Object val; \ | |
45d12a89 | 69 | XSETCONS (val, (char *) address + size); \ |
7146af97 JB |
70 | if ((char *) XCONS (val) != (char *) address + size) \ |
71 | { \ | |
9ac0d9e0 | 72 | xfree (address); \ |
7146af97 JB |
73 | memory_full (); \ |
74 | } \ | |
75 | } while (0) | |
76 | ||
276cbe5a RS |
77 | /* Value of _bytes_used, when spare_memory was freed. */ |
78 | static __malloc_size_t bytes_used_when_full; | |
79 | ||
7146af97 JB |
80 | /* Number of bytes of consing done since the last gc */ |
81 | int consing_since_gc; | |
82 | ||
310ea200 RS |
83 | /* Count the amount of consing of various sorts of space. */ |
84 | int cons_cells_consed; | |
85 | int floats_consed; | |
86 | int vector_cells_consed; | |
87 | int symbols_consed; | |
88 | int string_chars_consed; | |
89 | int misc_objects_consed; | |
90 | int intervals_consed; | |
91 | ||
7146af97 | 92 | /* Number of bytes of consing since gc before another gc should be done. */ |
b580578b | 93 | int gc_cons_threshold; |
7146af97 JB |
94 | |
95 | /* Nonzero during gc */ | |
96 | int gc_in_progress; | |
97 | ||
299585ee RS |
98 | /* Nonzero means display messages at beginning and end of GC. */ |
99 | int garbage_collection_messages; | |
100 | ||
7146af97 JB |
101 | #ifndef VIRT_ADDR_VARIES |
102 | extern | |
103 | #endif /* VIRT_ADDR_VARIES */ | |
104 | int malloc_sbrk_used; | |
105 | ||
106 | #ifndef VIRT_ADDR_VARIES | |
107 | extern | |
108 | #endif /* VIRT_ADDR_VARIES */ | |
109 | int malloc_sbrk_unused; | |
110 | ||
502b9b64 JB |
111 | /* Two limits controlling how much undo information to keep. */ |
112 | int undo_limit; | |
113 | int undo_strong_limit; | |
7146af97 | 114 | |
fd27a537 RS |
115 | int total_conses, total_markers, total_symbols, total_string_size, total_vector_size; |
116 | int total_free_conses, total_free_markers, total_free_symbols; | |
117 | #ifdef LISP_FLOAT_TYPE | |
118 | int total_free_floats, total_floats; | |
119 | #endif /* LISP_FLOAT_TYPE */ | |
120 | ||
276cbe5a RS |
121 | /* Points to memory space allocated as "spare", |
122 | to be freed if we run out of memory. */ | |
123 | static char *spare_memory; | |
124 | ||
125 | /* Amount of spare memory to keep in reserve. */ | |
126 | #define SPARE_MEMORY (1 << 14) | |
127 | ||
128 | /* Number of extra blocks malloc should get when it needs more core. */ | |
129 | static int malloc_hysteresis; | |
130 | ||
3c06d205 KH |
131 | /* Nonzero when malloc is called for allocating Lisp object space. */ |
132 | int allocating_for_lisp; | |
133 | ||
7146af97 JB |
134 | /* Non-nil means defun should do purecopy on the function definition */ |
135 | Lisp_Object Vpurify_flag; | |
136 | ||
137 | #ifndef HAVE_SHM | |
42607681 | 138 | EMACS_INT pure[PURESIZE / sizeof (EMACS_INT)] = {0,}; /* Force it into data space! */ |
7146af97 JB |
139 | #define PUREBEG (char *) pure |
140 | #else | |
141 | #define pure PURE_SEG_BITS /* Use shared memory segment */ | |
142 | #define PUREBEG (char *)PURE_SEG_BITS | |
4c0be5f4 JB |
143 | |
144 | /* This variable is used only by the XPNTR macro when HAVE_SHM is | |
145 | defined. If we used the PURESIZE macro directly there, that would | |
146 | make most of emacs dependent on puresize.h, which we don't want - | |
147 | you should be able to change that without too much recompilation. | |
148 | So map_in_data initializes pure_size, and the dependencies work | |
149 | out. */ | |
42607681 | 150 | EMACS_INT pure_size; |
7146af97 JB |
151 | #endif /* not HAVE_SHM */ |
152 | ||
153 | /* Index in pure at which next pure object will be allocated. */ | |
154 | int pureptr; | |
155 | ||
156 | /* If nonzero, this is a warning delivered by malloc and not yet displayed. */ | |
157 | char *pending_malloc_warning; | |
158 | ||
bcb61d60 | 159 | /* Pre-computed signal argument for use when memory is exhausted. */ |
cf3540e4 | 160 | Lisp_Object memory_signal_data; |
bcb61d60 | 161 | |
7146af97 JB |
162 | /* Maximum amount of C stack to save when a GC happens. */ |
163 | ||
164 | #ifndef MAX_SAVE_STACK | |
165 | #define MAX_SAVE_STACK 16000 | |
166 | #endif | |
167 | ||
1fb577f7 KH |
168 | /* Define DONT_COPY_FLAG to be some bit which will always be zero in a |
169 | pointer to a Lisp_Object, when that pointer is viewed as an integer. | |
170 | (On most machines, pointers are even, so we can use the low bit. | |
8e6208c5 | 171 | Word-addressable architectures may need to override this in the m-file.) |
1fb577f7 KH |
172 | When linking references to small strings through the size field, we |
173 | use this slot to hold the bit that would otherwise be interpreted as | |
174 | the GC mark bit. */ | |
155ffe9c | 175 | #ifndef DONT_COPY_FLAG |
1fb577f7 | 176 | #define DONT_COPY_FLAG 1 |
155ffe9c RS |
177 | #endif /* no DONT_COPY_FLAG */ |
178 | ||
7146af97 JB |
179 | /* Buffer in which we save a copy of the C stack at each GC. */ |
180 | ||
181 | char *stack_copy; | |
182 | int stack_copy_size; | |
183 | ||
184 | /* Non-zero means ignore malloc warnings. Set during initialization. */ | |
185 | int ignore_warnings; | |
350273a4 | 186 | |
a59de17b | 187 | Lisp_Object Qgc_cons_threshold, Qchar_table_extra_slots; |
e8197642 | 188 | |
b875d3f7 | 189 | static void mark_object (), mark_buffer (), mark_kboards (); |
350273a4 JA |
190 | static void clear_marks (), gc_sweep (); |
191 | static void compact_strings (); | |
7da0b0d3 RS |
192 | |
193 | extern int message_enable_multibyte; | |
7146af97 | 194 | \f |
1a4f1e2c JB |
195 | /* Versions of malloc and realloc that print warnings as memory gets full. */ |
196 | ||
7146af97 JB |
197 | Lisp_Object |
198 | malloc_warning_1 (str) | |
199 | Lisp_Object str; | |
200 | { | |
201 | Fprinc (str, Vstandard_output); | |
202 | write_string ("\nKilling some buffers may delay running out of memory.\n", -1); | |
203 | write_string ("However, certainly by the time you receive the 95% warning,\n", -1); | |
204 | write_string ("you should clean up, kill this Emacs, and start a new one.", -1); | |
205 | return Qnil; | |
206 | } | |
207 | ||
208 | /* malloc calls this if it finds we are near exhausting storage */ | |
d457598b AS |
209 | |
210 | void | |
7146af97 JB |
211 | malloc_warning (str) |
212 | char *str; | |
213 | { | |
214 | pending_malloc_warning = str; | |
215 | } | |
216 | ||
d457598b | 217 | void |
7146af97 JB |
218 | display_malloc_warning () |
219 | { | |
220 | register Lisp_Object val; | |
221 | ||
222 | val = build_string (pending_malloc_warning); | |
223 | pending_malloc_warning = 0; | |
224 | internal_with_output_to_temp_buffer (" *Danger*", malloc_warning_1, val); | |
225 | } | |
226 | ||
d1658221 | 227 | #ifdef DOUG_LEA_MALLOC |
1177ecf6 | 228 | # define BYTES_USED (mallinfo ().arena) |
d1658221 | 229 | #else |
1177ecf6 | 230 | # define BYTES_USED _bytes_used |
d1658221 RS |
231 | #endif |
232 | ||
7146af97 | 233 | /* Called if malloc returns zero */ |
276cbe5a | 234 | |
d457598b | 235 | void |
7146af97 JB |
236 | memory_full () |
237 | { | |
276cbe5a | 238 | #ifndef SYSTEM_MALLOC |
d1658221 | 239 | bytes_used_when_full = BYTES_USED; |
276cbe5a RS |
240 | #endif |
241 | ||
242 | /* The first time we get here, free the spare memory. */ | |
243 | if (spare_memory) | |
244 | { | |
245 | free (spare_memory); | |
246 | spare_memory = 0; | |
247 | } | |
248 | ||
249 | /* This used to call error, but if we've run out of memory, we could get | |
250 | infinite recursion trying to build the string. */ | |
251 | while (1) | |
74d84334 | 252 | Fsignal (Qnil, memory_signal_data); |
276cbe5a RS |
253 | } |
254 | ||
255 | /* Called if we can't allocate relocatable space for a buffer. */ | |
256 | ||
257 | void | |
258 | buffer_memory_full () | |
259 | { | |
260 | /* If buffers use the relocating allocator, | |
261 | no need to free spare_memory, because we may have plenty of malloc | |
262 | space left that we could get, and if we don't, the malloc that fails | |
263 | will itself cause spare_memory to be freed. | |
264 | If buffers don't use the relocating allocator, | |
265 | treat this like any other failing malloc. */ | |
266 | ||
267 | #ifndef REL_ALLOC | |
268 | memory_full (); | |
269 | #endif | |
270 | ||
bcb61d60 KH |
271 | /* This used to call error, but if we've run out of memory, we could get |
272 | infinite recursion trying to build the string. */ | |
273 | while (1) | |
274 | Fsignal (Qerror, memory_signal_data); | |
7146af97 JB |
275 | } |
276 | ||
9ac0d9e0 | 277 | /* like malloc routines but check for no memory and block interrupt input. */ |
7146af97 JB |
278 | |
279 | long * | |
280 | xmalloc (size) | |
281 | int size; | |
282 | { | |
283 | register long *val; | |
284 | ||
9ac0d9e0 | 285 | BLOCK_INPUT; |
7146af97 | 286 | val = (long *) malloc (size); |
9ac0d9e0 | 287 | UNBLOCK_INPUT; |
7146af97 JB |
288 | |
289 | if (!val && size) memory_full (); | |
290 | return val; | |
291 | } | |
292 | ||
293 | long * | |
294 | xrealloc (block, size) | |
295 | long *block; | |
296 | int size; | |
297 | { | |
298 | register long *val; | |
299 | ||
9ac0d9e0 | 300 | BLOCK_INPUT; |
56d2031b JB |
301 | /* We must call malloc explicitly when BLOCK is 0, since some |
302 | reallocs don't do this. */ | |
303 | if (! block) | |
304 | val = (long *) malloc (size); | |
f048679d | 305 | else |
56d2031b | 306 | val = (long *) realloc (block, size); |
9ac0d9e0 | 307 | UNBLOCK_INPUT; |
7146af97 JB |
308 | |
309 | if (!val && size) memory_full (); | |
310 | return val; | |
311 | } | |
9ac0d9e0 JB |
312 | |
313 | void | |
314 | xfree (block) | |
315 | long *block; | |
316 | { | |
317 | BLOCK_INPUT; | |
318 | free (block); | |
319 | UNBLOCK_INPUT; | |
320 | } | |
321 | ||
322 | \f | |
323 | /* Arranging to disable input signals while we're in malloc. | |
324 | ||
325 | This only works with GNU malloc. To help out systems which can't | |
326 | use GNU malloc, all the calls to malloc, realloc, and free | |
327 | elsewhere in the code should be inside a BLOCK_INPUT/UNBLOCK_INPUT | |
328 | pairs; unfortunately, we have no idea what C library functions | |
329 | might call malloc, so we can't really protect them unless you're | |
330 | using GNU malloc. Fortunately, most of the major operating can use | |
331 | GNU malloc. */ | |
332 | ||
333 | #ifndef SYSTEM_MALLOC | |
b0846f52 JB |
334 | extern void * (*__malloc_hook) (); |
335 | static void * (*old_malloc_hook) (); | |
336 | extern void * (*__realloc_hook) (); | |
337 | static void * (*old_realloc_hook) (); | |
338 | extern void (*__free_hook) (); | |
339 | static void (*old_free_hook) (); | |
9ac0d9e0 | 340 | |
276cbe5a RS |
341 | /* This function is used as the hook for free to call. */ |
342 | ||
9ac0d9e0 JB |
343 | static void |
344 | emacs_blocked_free (ptr) | |
345 | void *ptr; | |
346 | { | |
347 | BLOCK_INPUT; | |
348 | __free_hook = old_free_hook; | |
349 | free (ptr); | |
276cbe5a RS |
350 | /* If we released our reserve (due to running out of memory), |
351 | and we have a fair amount free once again, | |
352 | try to set aside another reserve in case we run out once more. */ | |
353 | if (spare_memory == 0 | |
354 | /* Verify there is enough space that even with the malloc | |
355 | hysteresis this call won't run out again. | |
356 | The code here is correct as long as SPARE_MEMORY | |
357 | is substantially larger than the block size malloc uses. */ | |
358 | && (bytes_used_when_full | |
d1658221 | 359 | > BYTES_USED + max (malloc_hysteresis, 4) * SPARE_MEMORY)) |
276cbe5a RS |
360 | spare_memory = (char *) malloc (SPARE_MEMORY); |
361 | ||
b0846f52 | 362 | __free_hook = emacs_blocked_free; |
9ac0d9e0 JB |
363 | UNBLOCK_INPUT; |
364 | } | |
365 | ||
276cbe5a RS |
366 | /* If we released our reserve (due to running out of memory), |
367 | and we have a fair amount free once again, | |
368 | try to set aside another reserve in case we run out once more. | |
369 | ||
370 | This is called when a relocatable block is freed in ralloc.c. */ | |
371 | ||
372 | void | |
373 | refill_memory_reserve () | |
374 | { | |
375 | if (spare_memory == 0) | |
376 | spare_memory = (char *) malloc (SPARE_MEMORY); | |
377 | } | |
378 | ||
379 | /* This function is the malloc hook that Emacs uses. */ | |
380 | ||
9ac0d9e0 JB |
381 | static void * |
382 | emacs_blocked_malloc (size) | |
383 | unsigned size; | |
384 | { | |
385 | void *value; | |
386 | ||
387 | BLOCK_INPUT; | |
388 | __malloc_hook = old_malloc_hook; | |
1177ecf6 | 389 | #ifdef DOUG_LEA_MALLOC |
d1658221 | 390 | mallopt (M_TOP_PAD, malloc_hysteresis * 4096); |
1177ecf6 | 391 | #else |
d1658221 | 392 | __malloc_extra_blocks = malloc_hysteresis; |
1177ecf6 | 393 | #endif |
2756d8ee | 394 | value = (void *) malloc (size); |
b0846f52 | 395 | __malloc_hook = emacs_blocked_malloc; |
9ac0d9e0 JB |
396 | UNBLOCK_INPUT; |
397 | ||
398 | return value; | |
399 | } | |
400 | ||
401 | static void * | |
402 | emacs_blocked_realloc (ptr, size) | |
403 | void *ptr; | |
404 | unsigned size; | |
405 | { | |
406 | void *value; | |
407 | ||
408 | BLOCK_INPUT; | |
409 | __realloc_hook = old_realloc_hook; | |
2756d8ee | 410 | value = (void *) realloc (ptr, size); |
b0846f52 | 411 | __realloc_hook = emacs_blocked_realloc; |
9ac0d9e0 JB |
412 | UNBLOCK_INPUT; |
413 | ||
414 | return value; | |
415 | } | |
416 | ||
417 | void | |
418 | uninterrupt_malloc () | |
419 | { | |
420 | old_free_hook = __free_hook; | |
b0846f52 | 421 | __free_hook = emacs_blocked_free; |
9ac0d9e0 JB |
422 | |
423 | old_malloc_hook = __malloc_hook; | |
b0846f52 | 424 | __malloc_hook = emacs_blocked_malloc; |
9ac0d9e0 JB |
425 | |
426 | old_realloc_hook = __realloc_hook; | |
b0846f52 | 427 | __realloc_hook = emacs_blocked_realloc; |
9ac0d9e0 JB |
428 | } |
429 | #endif | |
7146af97 | 430 | \f |
1a4f1e2c JB |
431 | /* Interval allocation. */ |
432 | ||
d5e35230 JA |
433 | #ifdef USE_TEXT_PROPERTIES |
434 | #define INTERVAL_BLOCK_SIZE \ | |
435 | ((1020 - sizeof (struct interval_block *)) / sizeof (struct interval)) | |
436 | ||
437 | struct interval_block | |
438 | { | |
439 | struct interval_block *next; | |
440 | struct interval intervals[INTERVAL_BLOCK_SIZE]; | |
441 | }; | |
442 | ||
443 | struct interval_block *interval_block; | |
444 | static int interval_block_index; | |
445 | ||
446 | INTERVAL interval_free_list; | |
447 | ||
448 | static void | |
449 | init_intervals () | |
450 | { | |
3c06d205 | 451 | allocating_for_lisp = 1; |
d5e35230 JA |
452 | interval_block |
453 | = (struct interval_block *) malloc (sizeof (struct interval_block)); | |
3c06d205 | 454 | allocating_for_lisp = 0; |
d5e35230 | 455 | interval_block->next = 0; |
290c8f1e | 456 | bzero ((char *) interval_block->intervals, sizeof interval_block->intervals); |
d5e35230 JA |
457 | interval_block_index = 0; |
458 | interval_free_list = 0; | |
459 | } | |
460 | ||
461 | #define INIT_INTERVALS init_intervals () | |
462 | ||
463 | INTERVAL | |
464 | make_interval () | |
465 | { | |
466 | INTERVAL val; | |
467 | ||
468 | if (interval_free_list) | |
469 | { | |
470 | val = interval_free_list; | |
471 | interval_free_list = interval_free_list->parent; | |
472 | } | |
473 | else | |
474 | { | |
475 | if (interval_block_index == INTERVAL_BLOCK_SIZE) | |
476 | { | |
3c06d205 KH |
477 | register struct interval_block *newi; |
478 | ||
479 | allocating_for_lisp = 1; | |
480 | newi = (struct interval_block *) xmalloc (sizeof (struct interval_block)); | |
d5e35230 | 481 | |
3c06d205 | 482 | allocating_for_lisp = 0; |
d5e35230 JA |
483 | VALIDATE_LISP_STORAGE (newi, sizeof *newi); |
484 | newi->next = interval_block; | |
485 | interval_block = newi; | |
486 | interval_block_index = 0; | |
487 | } | |
488 | val = &interval_block->intervals[interval_block_index++]; | |
489 | } | |
490 | consing_since_gc += sizeof (struct interval); | |
310ea200 | 491 | intervals_consed++; |
d5e35230 JA |
492 | RESET_INTERVAL (val); |
493 | return val; | |
494 | } | |
495 | ||
496 | static int total_free_intervals, total_intervals; | |
497 | ||
498 | /* Mark the pointers of one interval. */ | |
499 | ||
500 | static void | |
d393c068 | 501 | mark_interval (i, dummy) |
d5e35230 | 502 | register INTERVAL i; |
d393c068 | 503 | Lisp_Object dummy; |
d5e35230 JA |
504 | { |
505 | if (XMARKBIT (i->plist)) | |
506 | abort (); | |
507 | mark_object (&i->plist); | |
508 | XMARK (i->plist); | |
509 | } | |
510 | ||
511 | static void | |
512 | mark_interval_tree (tree) | |
513 | register INTERVAL tree; | |
514 | { | |
e8720644 JB |
515 | /* No need to test if this tree has been marked already; this |
516 | function is always called through the MARK_INTERVAL_TREE macro, | |
517 | which takes care of that. */ | |
518 | ||
519 | /* XMARK expands to an assignment; the LHS of an assignment can't be | |
520 | a cast. */ | |
521 | XMARK (* (Lisp_Object *) &tree->parent); | |
d5e35230 | 522 | |
d393c068 | 523 | traverse_intervals (tree, 1, 0, mark_interval, Qnil); |
d5e35230 JA |
524 | } |
525 | ||
e8720644 JB |
526 | #define MARK_INTERVAL_TREE(i) \ |
527 | do { \ | |
528 | if (!NULL_INTERVAL_P (i) \ | |
74d84334 | 529 | && ! XMARKBIT (*(Lisp_Object *) &i->parent)) \ |
e8720644 JB |
530 | mark_interval_tree (i); \ |
531 | } while (0) | |
d5e35230 | 532 | |
1a4f1e2c | 533 | /* The oddity in the call to XUNMARK is necessary because XUNMARK |
eb8c3be9 | 534 | expands to an assignment to its argument, and most C compilers don't |
1a4f1e2c JB |
535 | support casts on the left operand of `='. */ |
536 | #define UNMARK_BALANCE_INTERVALS(i) \ | |
537 | { \ | |
538 | if (! NULL_INTERVAL_P (i)) \ | |
539 | { \ | |
540 | XUNMARK (* (Lisp_Object *) (&(i)->parent)); \ | |
541 | (i) = balance_intervals (i); \ | |
542 | } \ | |
d5e35230 JA |
543 | } |
544 | ||
545 | #else /* no interval use */ | |
546 | ||
547 | #define INIT_INTERVALS | |
548 | ||
549 | #define UNMARK_BALANCE_INTERVALS(i) | |
550 | #define MARK_INTERVAL_TREE(i) | |
551 | ||
552 | #endif /* no interval use */ | |
553 | \f | |
1a4f1e2c JB |
554 | /* Floating point allocation. */ |
555 | ||
7146af97 JB |
556 | #ifdef LISP_FLOAT_TYPE |
557 | /* Allocation of float cells, just like conses */ | |
558 | /* We store float cells inside of float_blocks, allocating a new | |
559 | float_block with malloc whenever necessary. Float cells reclaimed by | |
560 | GC are put on a free list to be reallocated before allocating | |
561 | any new float cells from the latest float_block. | |
562 | ||
563 | Each float_block is just under 1020 bytes long, | |
564 | since malloc really allocates in units of powers of two | |
565 | and uses 4 bytes for its own overhead. */ | |
566 | ||
567 | #define FLOAT_BLOCK_SIZE \ | |
568 | ((1020 - sizeof (struct float_block *)) / sizeof (struct Lisp_Float)) | |
569 | ||
570 | struct float_block | |
571 | { | |
572 | struct float_block *next; | |
573 | struct Lisp_Float floats[FLOAT_BLOCK_SIZE]; | |
574 | }; | |
575 | ||
576 | struct float_block *float_block; | |
577 | int float_block_index; | |
578 | ||
579 | struct Lisp_Float *float_free_list; | |
580 | ||
581 | void | |
582 | init_float () | |
583 | { | |
3c06d205 | 584 | allocating_for_lisp = 1; |
7146af97 | 585 | float_block = (struct float_block *) malloc (sizeof (struct float_block)); |
3c06d205 | 586 | allocating_for_lisp = 0; |
7146af97 | 587 | float_block->next = 0; |
290c8f1e | 588 | bzero ((char *) float_block->floats, sizeof float_block->floats); |
7146af97 JB |
589 | float_block_index = 0; |
590 | float_free_list = 0; | |
591 | } | |
592 | ||
593 | /* Explicitly free a float cell. */ | |
dfcf069d | 594 | void |
7146af97 JB |
595 | free_float (ptr) |
596 | struct Lisp_Float *ptr; | |
597 | { | |
1cd5fe6a | 598 | *(struct Lisp_Float **)&ptr->data = float_free_list; |
7146af97 JB |
599 | float_free_list = ptr; |
600 | } | |
601 | ||
602 | Lisp_Object | |
603 | make_float (float_value) | |
604 | double float_value; | |
605 | { | |
606 | register Lisp_Object val; | |
607 | ||
608 | if (float_free_list) | |
609 | { | |
1cd5fe6a RS |
610 | /* We use the data field for chaining the free list |
611 | so that we won't use the same field that has the mark bit. */ | |
45d12a89 | 612 | XSETFLOAT (val, float_free_list); |
1cd5fe6a | 613 | float_free_list = *(struct Lisp_Float **)&float_free_list->data; |
7146af97 JB |
614 | } |
615 | else | |
616 | { | |
617 | if (float_block_index == FLOAT_BLOCK_SIZE) | |
618 | { | |
3c06d205 KH |
619 | register struct float_block *new; |
620 | ||
621 | allocating_for_lisp = 1; | |
622 | new = (struct float_block *) xmalloc (sizeof (struct float_block)); | |
623 | allocating_for_lisp = 0; | |
7146af97 JB |
624 | VALIDATE_LISP_STORAGE (new, sizeof *new); |
625 | new->next = float_block; | |
626 | float_block = new; | |
627 | float_block_index = 0; | |
628 | } | |
45d12a89 | 629 | XSETFLOAT (val, &float_block->floats[float_block_index++]); |
7146af97 JB |
630 | } |
631 | XFLOAT (val)->data = float_value; | |
67ba9986 | 632 | XSETFASTINT (XFLOAT (val)->type, 0); /* bug chasing -wsr */ |
7146af97 | 633 | consing_since_gc += sizeof (struct Lisp_Float); |
310ea200 | 634 | floats_consed++; |
7146af97 JB |
635 | return val; |
636 | } | |
637 | ||
638 | #endif /* LISP_FLOAT_TYPE */ | |
639 | \f | |
640 | /* Allocation of cons cells */ | |
641 | /* We store cons cells inside of cons_blocks, allocating a new | |
642 | cons_block with malloc whenever necessary. Cons cells reclaimed by | |
643 | GC are put on a free list to be reallocated before allocating | |
644 | any new cons cells from the latest cons_block. | |
645 | ||
646 | Each cons_block is just under 1020 bytes long, | |
647 | since malloc really allocates in units of powers of two | |
648 | and uses 4 bytes for its own overhead. */ | |
649 | ||
650 | #define CONS_BLOCK_SIZE \ | |
651 | ((1020 - sizeof (struct cons_block *)) / sizeof (struct Lisp_Cons)) | |
652 | ||
653 | struct cons_block | |
654 | { | |
655 | struct cons_block *next; | |
656 | struct Lisp_Cons conses[CONS_BLOCK_SIZE]; | |
657 | }; | |
658 | ||
659 | struct cons_block *cons_block; | |
660 | int cons_block_index; | |
661 | ||
662 | struct Lisp_Cons *cons_free_list; | |
663 | ||
664 | void | |
665 | init_cons () | |
666 | { | |
3c06d205 | 667 | allocating_for_lisp = 1; |
7146af97 | 668 | cons_block = (struct cons_block *) malloc (sizeof (struct cons_block)); |
3c06d205 | 669 | allocating_for_lisp = 0; |
7146af97 | 670 | cons_block->next = 0; |
290c8f1e | 671 | bzero ((char *) cons_block->conses, sizeof cons_block->conses); |
7146af97 JB |
672 | cons_block_index = 0; |
673 | cons_free_list = 0; | |
674 | } | |
675 | ||
676 | /* Explicitly free a cons cell. */ | |
d457598b AS |
677 | |
678 | void | |
7146af97 JB |
679 | free_cons (ptr) |
680 | struct Lisp_Cons *ptr; | |
681 | { | |
1cd5fe6a | 682 | *(struct Lisp_Cons **)&ptr->cdr = cons_free_list; |
7146af97 JB |
683 | cons_free_list = ptr; |
684 | } | |
685 | ||
686 | DEFUN ("cons", Fcons, Scons, 2, 2, 0, | |
687 | "Create a new cons, give it CAR and CDR as components, and return it.") | |
688 | (car, cdr) | |
689 | Lisp_Object car, cdr; | |
690 | { | |
691 | register Lisp_Object val; | |
692 | ||
693 | if (cons_free_list) | |
694 | { | |
1cd5fe6a RS |
695 | /* We use the cdr for chaining the free list |
696 | so that we won't use the same field that has the mark bit. */ | |
45d12a89 | 697 | XSETCONS (val, cons_free_list); |
1cd5fe6a | 698 | cons_free_list = *(struct Lisp_Cons **)&cons_free_list->cdr; |
7146af97 JB |
699 | } |
700 | else | |
701 | { | |
702 | if (cons_block_index == CONS_BLOCK_SIZE) | |
703 | { | |
3c06d205 KH |
704 | register struct cons_block *new; |
705 | allocating_for_lisp = 1; | |
706 | new = (struct cons_block *) xmalloc (sizeof (struct cons_block)); | |
707 | allocating_for_lisp = 0; | |
7146af97 JB |
708 | VALIDATE_LISP_STORAGE (new, sizeof *new); |
709 | new->next = cons_block; | |
710 | cons_block = new; | |
711 | cons_block_index = 0; | |
712 | } | |
45d12a89 | 713 | XSETCONS (val, &cons_block->conses[cons_block_index++]); |
7146af97 JB |
714 | } |
715 | XCONS (val)->car = car; | |
716 | XCONS (val)->cdr = cdr; | |
717 | consing_since_gc += sizeof (struct Lisp_Cons); | |
310ea200 | 718 | cons_cells_consed++; |
7146af97 JB |
719 | return val; |
720 | } | |
c0f51373 RS |
721 | \f |
722 | /* Make a list of 2, 3, 4 or 5 specified objects. */ | |
723 | ||
724 | Lisp_Object | |
725 | list2 (arg1, arg2) | |
726 | Lisp_Object arg1, arg2; | |
727 | { | |
728 | return Fcons (arg1, Fcons (arg2, Qnil)); | |
729 | } | |
730 | ||
731 | Lisp_Object | |
732 | list3 (arg1, arg2, arg3) | |
733 | Lisp_Object arg1, arg2, arg3; | |
734 | { | |
735 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Qnil))); | |
736 | } | |
737 | ||
738 | Lisp_Object | |
739 | list4 (arg1, arg2, arg3, arg4) | |
740 | Lisp_Object arg1, arg2, arg3, arg4; | |
741 | { | |
742 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Fcons (arg4, Qnil)))); | |
743 | } | |
744 | ||
745 | Lisp_Object | |
746 | list5 (arg1, arg2, arg3, arg4, arg5) | |
747 | Lisp_Object arg1, arg2, arg3, arg4, arg5; | |
748 | { | |
749 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Fcons (arg4, | |
750 | Fcons (arg5, Qnil))))); | |
751 | } | |
7146af97 JB |
752 | |
753 | DEFUN ("list", Flist, Slist, 0, MANY, 0, | |
754 | "Return a newly created list with specified arguments as elements.\n\ | |
755 | Any number of arguments, even zero arguments, are allowed.") | |
756 | (nargs, args) | |
757 | int nargs; | |
758 | register Lisp_Object *args; | |
759 | { | |
128a5b55 RS |
760 | register Lisp_Object val; |
761 | val = Qnil; | |
7146af97 | 762 | |
128a5b55 RS |
763 | while (nargs > 0) |
764 | { | |
765 | nargs--; | |
766 | val = Fcons (args[nargs], val); | |
767 | } | |
7146af97 JB |
768 | return val; |
769 | } | |
770 | ||
771 | DEFUN ("make-list", Fmake_list, Smake_list, 2, 2, 0, | |
772 | "Return a newly created list of length LENGTH, with each element being INIT.") | |
773 | (length, init) | |
774 | register Lisp_Object length, init; | |
775 | { | |
776 | register Lisp_Object val; | |
777 | register int size; | |
778 | ||
c9dad5ed KH |
779 | CHECK_NATNUM (length, 0); |
780 | size = XFASTINT (length); | |
7146af97 JB |
781 | |
782 | val = Qnil; | |
783 | while (size-- > 0) | |
784 | val = Fcons (init, val); | |
785 | return val; | |
786 | } | |
787 | \f | |
788 | /* Allocation of vectors */ | |
789 | ||
790 | struct Lisp_Vector *all_vectors; | |
791 | ||
1825c68d KH |
792 | struct Lisp_Vector * |
793 | allocate_vectorlike (len) | |
794 | EMACS_INT len; | |
795 | { | |
796 | struct Lisp_Vector *p; | |
797 | ||
3c06d205 | 798 | allocating_for_lisp = 1; |
d1658221 RS |
799 | #ifdef DOUG_LEA_MALLOC |
800 | /* Prevent mmap'ing the chunk (which is potentially very large). */ | |
801 | mallopt (M_MMAP_MAX, 0); | |
802 | #endif | |
1825c68d KH |
803 | p = (struct Lisp_Vector *)xmalloc (sizeof (struct Lisp_Vector) |
804 | + (len - 1) * sizeof (Lisp_Object)); | |
d1658221 RS |
805 | #ifdef DOUG_LEA_MALLOC |
806 | /* Back to a reasonable maximum of mmap'ed areas. */ | |
807 | mallopt (M_MMAP_MAX, 64); | |
808 | #endif | |
3c06d205 | 809 | allocating_for_lisp = 0; |
1825c68d KH |
810 | VALIDATE_LISP_STORAGE (p, 0); |
811 | consing_since_gc += (sizeof (struct Lisp_Vector) | |
812 | + (len - 1) * sizeof (Lisp_Object)); | |
310ea200 | 813 | vector_cells_consed += len; |
1825c68d KH |
814 | |
815 | p->next = all_vectors; | |
816 | all_vectors = p; | |
817 | return p; | |
818 | } | |
819 | ||
7146af97 JB |
820 | DEFUN ("make-vector", Fmake_vector, Smake_vector, 2, 2, 0, |
821 | "Return a newly created vector of length LENGTH, with each element being INIT.\n\ | |
822 | See also the function `vector'.") | |
823 | (length, init) | |
824 | register Lisp_Object length, init; | |
825 | { | |
1825c68d KH |
826 | Lisp_Object vector; |
827 | register EMACS_INT sizei; | |
828 | register int index; | |
7146af97 JB |
829 | register struct Lisp_Vector *p; |
830 | ||
c9dad5ed KH |
831 | CHECK_NATNUM (length, 0); |
832 | sizei = XFASTINT (length); | |
7146af97 | 833 | |
1825c68d | 834 | p = allocate_vectorlike (sizei); |
7146af97 | 835 | p->size = sizei; |
7146af97 JB |
836 | for (index = 0; index < sizei; index++) |
837 | p->contents[index] = init; | |
838 | ||
1825c68d | 839 | XSETVECTOR (vector, p); |
7146af97 JB |
840 | return vector; |
841 | } | |
842 | ||
a59de17b | 843 | DEFUN ("make-char-table", Fmake_char_table, Smake_char_table, 1, 2, 0, |
c58b2b4d | 844 | "Return a newly created char-table, with purpose PURPOSE.\n\ |
7b07587b | 845 | Each element is initialized to INIT, which defaults to nil.\n\ |
d7cd5d4f | 846 | PURPOSE should be a symbol which has a `char-table-extra-slots' property.\n\ |
a59de17b RS |
847 | The property's value should be an integer between 0 and 10.") |
848 | (purpose, init) | |
849 | register Lisp_Object purpose, init; | |
7b07587b RS |
850 | { |
851 | Lisp_Object vector; | |
a59de17b RS |
852 | Lisp_Object n; |
853 | CHECK_SYMBOL (purpose, 1); | |
0551bde3 | 854 | n = Fget (purpose, Qchar_table_extra_slots); |
a59de17b | 855 | CHECK_NUMBER (n, 0); |
7b07587b RS |
856 | if (XINT (n) < 0 || XINT (n) > 10) |
857 | args_out_of_range (n, Qnil); | |
858 | /* Add 2 to the size for the defalt and parent slots. */ | |
859 | vector = Fmake_vector (make_number (CHAR_TABLE_STANDARD_SLOTS + XINT (n)), | |
860 | init); | |
0551bde3 | 861 | XCHAR_TABLE (vector)->top = Qt; |
c96a008c | 862 | XCHAR_TABLE (vector)->parent = Qnil; |
a59de17b | 863 | XCHAR_TABLE (vector)->purpose = purpose; |
7b07587b RS |
864 | XSETCHAR_TABLE (vector, XCHAR_TABLE (vector)); |
865 | return vector; | |
866 | } | |
867 | ||
0551bde3 KH |
868 | /* Return a newly created sub char table with default value DEFALT. |
869 | Since a sub char table does not appear as a top level Emacs Lisp | |
870 | object, we don't need a Lisp interface to make it. */ | |
871 | ||
872 | Lisp_Object | |
873 | make_sub_char_table (defalt) | |
874 | Lisp_Object defalt; | |
875 | { | |
876 | Lisp_Object vector | |
877 | = Fmake_vector (make_number (SUB_CHAR_TABLE_STANDARD_SLOTS), Qnil); | |
878 | XCHAR_TABLE (vector)->top = Qnil; | |
879 | XCHAR_TABLE (vector)->defalt = defalt; | |
880 | XSETCHAR_TABLE (vector, XCHAR_TABLE (vector)); | |
881 | return vector; | |
882 | } | |
883 | ||
7146af97 JB |
884 | DEFUN ("vector", Fvector, Svector, 0, MANY, 0, |
885 | "Return a newly created vector with specified arguments as elements.\n\ | |
886 | Any number of arguments, even zero arguments, are allowed.") | |
887 | (nargs, args) | |
888 | register int nargs; | |
889 | Lisp_Object *args; | |
890 | { | |
891 | register Lisp_Object len, val; | |
892 | register int index; | |
893 | register struct Lisp_Vector *p; | |
894 | ||
67ba9986 | 895 | XSETFASTINT (len, nargs); |
7146af97 JB |
896 | val = Fmake_vector (len, Qnil); |
897 | p = XVECTOR (val); | |
898 | for (index = 0; index < nargs; index++) | |
899 | p->contents[index] = args[index]; | |
900 | return val; | |
901 | } | |
902 | ||
903 | DEFUN ("make-byte-code", Fmake_byte_code, Smake_byte_code, 4, MANY, 0, | |
904 | "Create a byte-code object with specified arguments as elements.\n\ | |
905 | The arguments should be the arglist, bytecode-string, constant vector,\n\ | |
906 | stack size, (optional) doc string, and (optional) interactive spec.\n\ | |
907 | The first four arguments are required; at most six have any\n\ | |
908 | significance.") | |
909 | (nargs, args) | |
910 | register int nargs; | |
911 | Lisp_Object *args; | |
912 | { | |
913 | register Lisp_Object len, val; | |
914 | register int index; | |
915 | register struct Lisp_Vector *p; | |
916 | ||
67ba9986 | 917 | XSETFASTINT (len, nargs); |
265a9e55 | 918 | if (!NILP (Vpurify_flag)) |
5a053ea9 | 919 | val = make_pure_vector ((EMACS_INT) nargs); |
7146af97 JB |
920 | else |
921 | val = Fmake_vector (len, Qnil); | |
922 | p = XVECTOR (val); | |
923 | for (index = 0; index < nargs; index++) | |
924 | { | |
265a9e55 | 925 | if (!NILP (Vpurify_flag)) |
7146af97 JB |
926 | args[index] = Fpurecopy (args[index]); |
927 | p->contents[index] = args[index]; | |
928 | } | |
50aee051 | 929 | XSETCOMPILED (val, p); |
7146af97 JB |
930 | return val; |
931 | } | |
932 | \f | |
933 | /* Allocation of symbols. | |
934 | Just like allocation of conses! | |
935 | ||
936 | Each symbol_block is just under 1020 bytes long, | |
937 | since malloc really allocates in units of powers of two | |
938 | and uses 4 bytes for its own overhead. */ | |
939 | ||
940 | #define SYMBOL_BLOCK_SIZE \ | |
941 | ((1020 - sizeof (struct symbol_block *)) / sizeof (struct Lisp_Symbol)) | |
942 | ||
943 | struct symbol_block | |
944 | { | |
945 | struct symbol_block *next; | |
946 | struct Lisp_Symbol symbols[SYMBOL_BLOCK_SIZE]; | |
947 | }; | |
948 | ||
949 | struct symbol_block *symbol_block; | |
950 | int symbol_block_index; | |
951 | ||
952 | struct Lisp_Symbol *symbol_free_list; | |
953 | ||
954 | void | |
955 | init_symbol () | |
956 | { | |
3c06d205 | 957 | allocating_for_lisp = 1; |
7146af97 | 958 | symbol_block = (struct symbol_block *) malloc (sizeof (struct symbol_block)); |
3c06d205 | 959 | allocating_for_lisp = 0; |
7146af97 | 960 | symbol_block->next = 0; |
290c8f1e | 961 | bzero ((char *) symbol_block->symbols, sizeof symbol_block->symbols); |
7146af97 JB |
962 | symbol_block_index = 0; |
963 | symbol_free_list = 0; | |
964 | } | |
965 | ||
966 | DEFUN ("make-symbol", Fmake_symbol, Smake_symbol, 1, 1, 0, | |
967 | "Return a newly allocated uninterned symbol whose name is NAME.\n\ | |
968 | Its value and function definition are void, and its property list is nil.") | |
54ee42dd EN |
969 | (name) |
970 | Lisp_Object name; | |
7146af97 JB |
971 | { |
972 | register Lisp_Object val; | |
973 | register struct Lisp_Symbol *p; | |
974 | ||
54ee42dd | 975 | CHECK_STRING (name, 0); |
7146af97 JB |
976 | |
977 | if (symbol_free_list) | |
978 | { | |
45d12a89 | 979 | XSETSYMBOL (val, symbol_free_list); |
85481507 | 980 | symbol_free_list = *(struct Lisp_Symbol **)&symbol_free_list->value; |
7146af97 JB |
981 | } |
982 | else | |
983 | { | |
984 | if (symbol_block_index == SYMBOL_BLOCK_SIZE) | |
985 | { | |
3c06d205 KH |
986 | struct symbol_block *new; |
987 | allocating_for_lisp = 1; | |
988 | new = (struct symbol_block *) xmalloc (sizeof (struct symbol_block)); | |
989 | allocating_for_lisp = 0; | |
7146af97 JB |
990 | VALIDATE_LISP_STORAGE (new, sizeof *new); |
991 | new->next = symbol_block; | |
992 | symbol_block = new; | |
993 | symbol_block_index = 0; | |
994 | } | |
45d12a89 | 995 | XSETSYMBOL (val, &symbol_block->symbols[symbol_block_index++]); |
7146af97 JB |
996 | } |
997 | p = XSYMBOL (val); | |
636b7260 | 998 | p->name = XSTRING (name); |
47d5b31e | 999 | p->obarray = Qnil; |
7146af97 JB |
1000 | p->plist = Qnil; |
1001 | p->value = Qunbound; | |
1002 | p->function = Qunbound; | |
1003 | p->next = 0; | |
1004 | consing_since_gc += sizeof (struct Lisp_Symbol); | |
310ea200 | 1005 | symbols_consed++; |
7146af97 JB |
1006 | return val; |
1007 | } | |
1008 | \f | |
a0a38eb7 | 1009 | /* Allocation of markers and other objects that share that structure. |
7146af97 JB |
1010 | Works like allocation of conses. */ |
1011 | ||
1012 | #define MARKER_BLOCK_SIZE \ | |
a0a38eb7 | 1013 | ((1020 - sizeof (struct marker_block *)) / sizeof (union Lisp_Misc)) |
7146af97 JB |
1014 | |
1015 | struct marker_block | |
1016 | { | |
1017 | struct marker_block *next; | |
a0a38eb7 | 1018 | union Lisp_Misc markers[MARKER_BLOCK_SIZE]; |
7146af97 JB |
1019 | }; |
1020 | ||
1021 | struct marker_block *marker_block; | |
1022 | int marker_block_index; | |
1023 | ||
a0a38eb7 | 1024 | union Lisp_Misc *marker_free_list; |
7146af97 JB |
1025 | |
1026 | void | |
1027 | init_marker () | |
1028 | { | |
3c06d205 | 1029 | allocating_for_lisp = 1; |
7146af97 | 1030 | marker_block = (struct marker_block *) malloc (sizeof (struct marker_block)); |
3c06d205 | 1031 | allocating_for_lisp = 0; |
7146af97 | 1032 | marker_block->next = 0; |
290c8f1e | 1033 | bzero ((char *) marker_block->markers, sizeof marker_block->markers); |
7146af97 JB |
1034 | marker_block_index = 0; |
1035 | marker_free_list = 0; | |
1036 | } | |
1037 | ||
a0a38eb7 KH |
1038 | /* Return a newly allocated Lisp_Misc object, with no substructure. */ |
1039 | Lisp_Object | |
1040 | allocate_misc () | |
7146af97 | 1041 | { |
a0a38eb7 | 1042 | Lisp_Object val; |
e065a56e | 1043 | |
7146af97 JB |
1044 | if (marker_free_list) |
1045 | { | |
a0a38eb7 KH |
1046 | XSETMISC (val, marker_free_list); |
1047 | marker_free_list = marker_free_list->u_free.chain; | |
7146af97 JB |
1048 | } |
1049 | else | |
1050 | { | |
1051 | if (marker_block_index == MARKER_BLOCK_SIZE) | |
1052 | { | |
3c06d205 KH |
1053 | struct marker_block *new; |
1054 | allocating_for_lisp = 1; | |
1055 | new = (struct marker_block *) xmalloc (sizeof (struct marker_block)); | |
1056 | allocating_for_lisp = 0; | |
7146af97 JB |
1057 | VALIDATE_LISP_STORAGE (new, sizeof *new); |
1058 | new->next = marker_block; | |
1059 | marker_block = new; | |
1060 | marker_block_index = 0; | |
1061 | } | |
a0a38eb7 | 1062 | XSETMISC (val, &marker_block->markers[marker_block_index++]); |
7146af97 | 1063 | } |
a0a38eb7 | 1064 | consing_since_gc += sizeof (union Lisp_Misc); |
310ea200 | 1065 | misc_objects_consed++; |
a0a38eb7 KH |
1066 | return val; |
1067 | } | |
1068 | ||
1069 | DEFUN ("make-marker", Fmake_marker, Smake_marker, 0, 0, 0, | |
1070 | "Return a newly allocated marker which does not point at any place.") | |
1071 | () | |
1072 | { | |
1073 | register Lisp_Object val; | |
1074 | register struct Lisp_Marker *p; | |
1075 | ||
1076 | val = allocate_misc (); | |
a5da44fe | 1077 | XMISCTYPE (val) = Lisp_Misc_Marker; |
7146af97 JB |
1078 | p = XMARKER (val); |
1079 | p->buffer = 0; | |
193b12ca RS |
1080 | p->bytepos = 0; |
1081 | p->charpos = 0; | |
7146af97 | 1082 | p->chain = Qnil; |
6ef5c4bd | 1083 | p->insertion_type = 0; |
7146af97 JB |
1084 | return val; |
1085 | } | |
fd27a537 RS |
1086 | |
1087 | /* Put MARKER back on the free list after using it temporarily. */ | |
1088 | ||
d457598b | 1089 | void |
fd27a537 RS |
1090 | free_marker (marker) |
1091 | Lisp_Object marker; | |
1092 | { | |
5c5631cf RS |
1093 | unchain_marker (marker); |
1094 | ||
fd27a537 RS |
1095 | XMISC (marker)->u_marker.type = Lisp_Misc_Free; |
1096 | XMISC (marker)->u_free.chain = marker_free_list; | |
1097 | marker_free_list = XMISC (marker); | |
1098 | ||
1099 | total_free_markers++; | |
1100 | } | |
7146af97 JB |
1101 | \f |
1102 | /* Allocation of strings */ | |
1103 | ||
1104 | /* Strings reside inside of string_blocks. The entire data of the string, | |
1105 | both the size and the contents, live in part of the `chars' component of a string_block. | |
1106 | The `pos' component is the index within `chars' of the first free byte. | |
1107 | ||
1108 | first_string_block points to the first string_block ever allocated. | |
1109 | Each block points to the next one with its `next' field. | |
1110 | The `prev' fields chain in reverse order. | |
1111 | The last one allocated is the one currently being filled. | |
1112 | current_string_block points to it. | |
1113 | ||
1114 | The string_blocks that hold individual large strings | |
1115 | go in a separate chain, started by large_string_blocks. */ | |
1116 | ||
1117 | ||
1118 | /* String blocks contain this many useful bytes. | |
1119 | 8188 is power of 2, minus 4 for malloc overhead. */ | |
1120 | #define STRING_BLOCK_SIZE (8188 - sizeof (struct string_block_head)) | |
1121 | ||
1122 | /* A string bigger than this gets its own specially-made string block | |
1123 | if it doesn't fit in the current one. */ | |
1124 | #define STRING_BLOCK_OUTSIZE 1024 | |
1125 | ||
1126 | struct string_block_head | |
1127 | { | |
1128 | struct string_block *next, *prev; | |
0e7ff58f | 1129 | EMACS_INT pos; |
7146af97 JB |
1130 | }; |
1131 | ||
1132 | struct string_block | |
1133 | { | |
1134 | struct string_block *next, *prev; | |
42607681 | 1135 | EMACS_INT pos; |
7146af97 JB |
1136 | char chars[STRING_BLOCK_SIZE]; |
1137 | }; | |
1138 | ||
1139 | /* This points to the string block we are now allocating strings. */ | |
1140 | ||
1141 | struct string_block *current_string_block; | |
1142 | ||
1143 | /* This points to the oldest string block, the one that starts the chain. */ | |
1144 | ||
1145 | struct string_block *first_string_block; | |
1146 | ||
1147 | /* Last string block in chain of those made for individual large strings. */ | |
1148 | ||
1149 | struct string_block *large_string_blocks; | |
1150 | ||
1151 | /* If SIZE is the length of a string, this returns how many bytes | |
1152 | the string occupies in a string_block (including padding). */ | |
1153 | ||
b3fd4d8f KH |
1154 | #define STRING_FULLSIZE(size) (((size) + 1 + STRING_BASE_SIZE + STRING_PAD - 1) \ |
1155 | & ~(STRING_PAD - 1)) | |
1156 | /* Add 1 for the null terminator, | |
1157 | and add STRING_PAD - 1 as part of rounding up. */ | |
1158 | ||
1159 | #define STRING_PAD (sizeof (EMACS_INT)) | |
1160 | /* Size of the stuff in the string not including its data. */ | |
1161 | #define STRING_BASE_SIZE (((sizeof (struct Lisp_String) - 1) / STRING_PAD) * STRING_PAD) | |
7146af97 JB |
1162 | |
1163 | #if 0 | |
1164 | #define STRING_FULLSIZE(SIZE) \ | |
42607681 | 1165 | (((SIZE) + 2 * sizeof (EMACS_INT)) & ~(sizeof (EMACS_INT) - 1)) |
7146af97 JB |
1166 | #endif |
1167 | ||
1168 | void | |
1169 | init_strings () | |
1170 | { | |
3c06d205 | 1171 | allocating_for_lisp = 1; |
7146af97 | 1172 | current_string_block = (struct string_block *) malloc (sizeof (struct string_block)); |
3c06d205 | 1173 | allocating_for_lisp = 0; |
7146af97 JB |
1174 | first_string_block = current_string_block; |
1175 | consing_since_gc += sizeof (struct string_block); | |
1176 | current_string_block->next = 0; | |
1177 | current_string_block->prev = 0; | |
1178 | current_string_block->pos = 0; | |
1179 | large_string_blocks = 0; | |
1180 | } | |
c0696668 | 1181 | \f |
7146af97 JB |
1182 | DEFUN ("make-string", Fmake_string, Smake_string, 2, 2, 0, |
1183 | "Return a newly created string of length LENGTH, with each element being INIT.\n\ | |
1184 | Both LENGTH and INIT must be numbers.") | |
1185 | (length, init) | |
1186 | Lisp_Object length, init; | |
1187 | { | |
1188 | register Lisp_Object val; | |
e54daa22 RS |
1189 | register unsigned char *p, *end; |
1190 | int c, nbytes; | |
7146af97 | 1191 | |
c9dad5ed | 1192 | CHECK_NATNUM (length, 0); |
7146af97 | 1193 | CHECK_NUMBER (init, 1); |
e54daa22 | 1194 | |
7146af97 | 1195 | c = XINT (init); |
e54daa22 RS |
1196 | if (SINGLE_BYTE_CHAR_P (c)) |
1197 | { | |
1198 | nbytes = XINT (length); | |
c0696668 | 1199 | val = make_uninit_string (nbytes); |
e54daa22 RS |
1200 | p = XSTRING (val)->data; |
1201 | end = p + XSTRING (val)->size; | |
1202 | while (p != end) | |
1203 | *p++ = c; | |
1204 | } | |
1205 | else | |
1206 | { | |
1207 | unsigned char work[4], *str; | |
1208 | int len = CHAR_STRING (c, work, str); | |
1209 | ||
1210 | nbytes = len * XINT (length); | |
1211 | val = make_uninit_multibyte_string (XINT (length), nbytes); | |
1212 | p = XSTRING (val)->data; | |
1213 | end = p + nbytes; | |
1214 | while (p != end) | |
1215 | { | |
1216 | bcopy (str, p, len); | |
1217 | p += len; | |
1218 | } | |
1219 | } | |
7146af97 JB |
1220 | *p = 0; |
1221 | return val; | |
1222 | } | |
1223 | ||
7b07587b | 1224 | DEFUN ("make-bool-vector", Fmake_bool_vector, Smake_bool_vector, 2, 2, 0, |
41ab2240 RS |
1225 | "Return a new bool-vector of length LENGTH, using INIT for as each element.\n\ |
1226 | LENGTH must be a number. INIT matters only in whether it is t or nil.") | |
7b07587b RS |
1227 | (length, init) |
1228 | Lisp_Object length, init; | |
1229 | { | |
1230 | register Lisp_Object val; | |
1231 | struct Lisp_Bool_Vector *p; | |
1232 | int real_init, i; | |
1233 | int length_in_chars, length_in_elts, bits_per_value; | |
1234 | ||
1235 | CHECK_NATNUM (length, 0); | |
1236 | ||
68be917d | 1237 | bits_per_value = sizeof (EMACS_INT) * BITS_PER_CHAR; |
7b07587b RS |
1238 | |
1239 | length_in_elts = (XFASTINT (length) + bits_per_value - 1) / bits_per_value; | |
a558a05d | 1240 | length_in_chars = ((XFASTINT (length) + BITS_PER_CHAR - 1) / BITS_PER_CHAR); |
7b07587b | 1241 | |
38a1965a KH |
1242 | /* We must allocate one more elements than LENGTH_IN_ELTS for the |
1243 | slot `size' of the struct Lisp_Bool_Vector. */ | |
1244 | val = Fmake_vector (make_number (length_in_elts + 1), Qnil); | |
7b07587b RS |
1245 | p = XBOOL_VECTOR (val); |
1246 | /* Get rid of any bits that would cause confusion. */ | |
1247 | p->vector_size = 0; | |
1248 | XSETBOOL_VECTOR (val, p); | |
1249 | p->size = XFASTINT (length); | |
1250 | ||
1251 | real_init = (NILP (init) ? 0 : -1); | |
1252 | for (i = 0; i < length_in_chars ; i++) | |
1253 | p->data[i] = real_init; | |
a558a05d RS |
1254 | /* Clear the extraneous bits in the last byte. */ |
1255 | if (XINT (length) != length_in_chars * BITS_PER_CHAR) | |
1256 | XBOOL_VECTOR (val)->data[length_in_chars - 1] | |
1257 | &= (1 << (XINT (length) % BITS_PER_CHAR)) - 1; | |
7b07587b RS |
1258 | |
1259 | return val; | |
1260 | } | |
c0696668 | 1261 | \f |
3f25e183 | 1262 | /* Make a string from NBYTES bytes at CONTENTS, |
c0696668 RS |
1263 | and compute the number of characters from the contents. |
1264 | This string may be unibyte or multibyte, depending on the contents. */ | |
3f25e183 | 1265 | |
7146af97 | 1266 | Lisp_Object |
3f25e183 RS |
1267 | make_string (contents, nbytes) |
1268 | char *contents; | |
1269 | int nbytes; | |
1270 | { | |
1271 | register Lisp_Object val; | |
1272 | int nchars = chars_in_text (contents, nbytes); | |
1273 | val = make_uninit_multibyte_string (nchars, nbytes); | |
1274 | bcopy (contents, XSTRING (val)->data, nbytes); | |
c0696668 RS |
1275 | if (STRING_BYTES (XSTRING (val)) == XSTRING (val)->size) |
1276 | SET_STRING_BYTES (XSTRING (val), -1); | |
3f25e183 RS |
1277 | return val; |
1278 | } | |
1279 | ||
c0696668 | 1280 | /* Make a unibyte string from LENGTH bytes at CONTENTS. */ |
3f25e183 RS |
1281 | |
1282 | Lisp_Object | |
1283 | make_unibyte_string (contents, length) | |
7146af97 JB |
1284 | char *contents; |
1285 | int length; | |
1286 | { | |
1287 | register Lisp_Object val; | |
1288 | val = make_uninit_string (length); | |
1289 | bcopy (contents, XSTRING (val)->data, length); | |
c0696668 | 1290 | SET_STRING_BYTES (XSTRING (val), -1); |
7146af97 JB |
1291 | return val; |
1292 | } | |
1293 | ||
c0696668 RS |
1294 | /* Make a multibyte string from NCHARS characters |
1295 | occupying NBYTES bytes at CONTENTS. */ | |
3f25e183 RS |
1296 | |
1297 | Lisp_Object | |
1298 | make_multibyte_string (contents, nchars, nbytes) | |
1299 | char *contents; | |
1300 | int nchars, nbytes; | |
1301 | { | |
1302 | register Lisp_Object val; | |
1303 | val = make_uninit_multibyte_string (nchars, nbytes); | |
1304 | bcopy (contents, XSTRING (val)->data, nbytes); | |
1305 | return val; | |
1306 | } | |
1307 | ||
c0696668 RS |
1308 | /* Make a string from NCHARS characters |
1309 | occupying NBYTES bytes at CONTENTS. | |
1310 | It is a multibyte string if NBYTES != NCHARS. */ | |
1311 | ||
1312 | Lisp_Object | |
1313 | make_string_from_bytes (contents, nchars, nbytes) | |
1314 | char *contents; | |
1315 | int nchars, nbytes; | |
1316 | { | |
1317 | register Lisp_Object val; | |
1318 | val = make_uninit_multibyte_string (nchars, nbytes); | |
1319 | bcopy (contents, XSTRING (val)->data, nbytes); | |
1320 | if (STRING_BYTES (XSTRING (val)) == XSTRING (val)->size) | |
1321 | SET_STRING_BYTES (XSTRING (val), -1); | |
1322 | return val; | |
1323 | } | |
1324 | ||
1325 | /* Make a multibyte string from NCHARS characters | |
1326 | occupying NBYTES bytes at CONTENTS. */ | |
1327 | ||
1328 | Lisp_Object | |
1329 | make_specified_string (contents, nchars, nbytes, multibyte) | |
1330 | char *contents; | |
1331 | int nchars, nbytes; | |
1332 | int multibyte; | |
1333 | { | |
1334 | register Lisp_Object val; | |
1335 | val = make_uninit_multibyte_string (nchars, nbytes); | |
1336 | bcopy (contents, XSTRING (val)->data, nbytes); | |
1337 | if (!multibyte) | |
1338 | SET_STRING_BYTES (XSTRING (val), -1); | |
1339 | return val; | |
1340 | } | |
1341 | ||
3f25e183 RS |
1342 | /* Make a string from the data at STR, |
1343 | treating it as multibyte if the data warrants. */ | |
1344 | ||
7146af97 JB |
1345 | Lisp_Object |
1346 | build_string (str) | |
1347 | char *str; | |
1348 | { | |
1349 | return make_string (str, strlen (str)); | |
1350 | } | |
c0696668 | 1351 | \f |
7146af97 JB |
1352 | Lisp_Object |
1353 | make_uninit_string (length) | |
1354 | int length; | |
3f25e183 | 1355 | { |
c0696668 RS |
1356 | Lisp_Object val; |
1357 | val = make_uninit_multibyte_string (length, length); | |
1358 | SET_STRING_BYTES (XSTRING (val), -1); | |
1359 | return val; | |
3f25e183 RS |
1360 | } |
1361 | ||
1362 | Lisp_Object | |
1363 | make_uninit_multibyte_string (length, length_byte) | |
1364 | int length, length_byte; | |
7146af97 JB |
1365 | { |
1366 | register Lisp_Object val; | |
3f25e183 | 1367 | register int fullsize = STRING_FULLSIZE (length_byte); |
7146af97 JB |
1368 | |
1369 | if (length < 0) abort (); | |
1370 | ||
1371 | if (fullsize <= STRING_BLOCK_SIZE - current_string_block->pos) | |
1372 | /* This string can fit in the current string block */ | |
1373 | { | |
45d12a89 KH |
1374 | XSETSTRING (val, |
1375 | ((struct Lisp_String *) | |
1376 | (current_string_block->chars + current_string_block->pos))); | |
7146af97 JB |
1377 | current_string_block->pos += fullsize; |
1378 | } | |
1379 | else if (fullsize > STRING_BLOCK_OUTSIZE) | |
1380 | /* This string gets its own string block */ | |
1381 | { | |
3c06d205 KH |
1382 | register struct string_block *new; |
1383 | allocating_for_lisp = 1; | |
d1658221 RS |
1384 | #ifdef DOUG_LEA_MALLOC |
1385 | /* Prevent mmap'ing the chunk (which is potentially very large). */ | |
1386 | mallopt (M_MMAP_MAX, 0); | |
1387 | #endif | |
3c06d205 | 1388 | new = (struct string_block *) xmalloc (sizeof (struct string_block_head) + fullsize); |
d1658221 RS |
1389 | #ifdef DOUG_LEA_MALLOC |
1390 | /* Back to a reasonable maximum of mmap'ed areas. */ | |
1391 | mallopt (M_MMAP_MAX, 64); | |
1392 | #endif | |
3c06d205 | 1393 | allocating_for_lisp = 0; |
7146af97 | 1394 | VALIDATE_LISP_STORAGE (new, 0); |
7146af97 JB |
1395 | consing_since_gc += sizeof (struct string_block_head) + fullsize; |
1396 | new->pos = fullsize; | |
1397 | new->next = large_string_blocks; | |
1398 | large_string_blocks = new; | |
45d12a89 KH |
1399 | XSETSTRING (val, |
1400 | ((struct Lisp_String *) | |
1401 | ((struct string_block_head *)new + 1))); | |
7146af97 JB |
1402 | } |
1403 | else | |
1404 | /* Make a new current string block and start it off with this string */ | |
1405 | { | |
3c06d205 KH |
1406 | register struct string_block *new; |
1407 | allocating_for_lisp = 1; | |
1408 | new = (struct string_block *) xmalloc (sizeof (struct string_block)); | |
1409 | allocating_for_lisp = 0; | |
7146af97 JB |
1410 | VALIDATE_LISP_STORAGE (new, sizeof *new); |
1411 | consing_since_gc += sizeof (struct string_block); | |
1412 | current_string_block->next = new; | |
1413 | new->prev = current_string_block; | |
1414 | new->next = 0; | |
1415 | current_string_block = new; | |
1416 | new->pos = fullsize; | |
45d12a89 KH |
1417 | XSETSTRING (val, |
1418 | (struct Lisp_String *) current_string_block->chars); | |
7146af97 JB |
1419 | } |
1420 | ||
310ea200 | 1421 | string_chars_consed += fullsize; |
7146af97 | 1422 | XSTRING (val)->size = length; |
fc932ac6 | 1423 | SET_STRING_BYTES (XSTRING (val), length_byte); |
3f25e183 | 1424 | XSTRING (val)->data[length_byte] = 0; |
d5e35230 | 1425 | INITIALIZE_INTERVAL (XSTRING (val), NULL_INTERVAL); |
7146af97 JB |
1426 | |
1427 | return val; | |
1428 | } | |
c0696668 | 1429 | \f |
7146af97 | 1430 | /* Return a newly created vector or string with specified arguments as |
736471d1 RS |
1431 | elements. If all the arguments are characters that can fit |
1432 | in a string of events, make a string; otherwise, make a vector. | |
1433 | ||
1434 | Any number of arguments, even zero arguments, are allowed. */ | |
7146af97 JB |
1435 | |
1436 | Lisp_Object | |
736471d1 | 1437 | make_event_array (nargs, args) |
7146af97 JB |
1438 | register int nargs; |
1439 | Lisp_Object *args; | |
1440 | { | |
1441 | int i; | |
1442 | ||
1443 | for (i = 0; i < nargs; i++) | |
736471d1 | 1444 | /* The things that fit in a string |
c9ca4659 RS |
1445 | are characters that are in 0...127, |
1446 | after discarding the meta bit and all the bits above it. */ | |
e687453f | 1447 | if (!INTEGERP (args[i]) |
c9ca4659 | 1448 | || (XUINT (args[i]) & ~(-CHAR_META)) >= 0200) |
7146af97 JB |
1449 | return Fvector (nargs, args); |
1450 | ||
1451 | /* Since the loop exited, we know that all the things in it are | |
1452 | characters, so we can make a string. */ | |
1453 | { | |
c13ccad2 | 1454 | Lisp_Object result; |
7146af97 | 1455 | |
50aee051 | 1456 | result = Fmake_string (make_number (nargs), make_number (0)); |
7146af97 | 1457 | for (i = 0; i < nargs; i++) |
736471d1 RS |
1458 | { |
1459 | XSTRING (result)->data[i] = XINT (args[i]); | |
1460 | /* Move the meta bit to the right place for a string char. */ | |
1461 | if (XINT (args[i]) & CHAR_META) | |
1462 | XSTRING (result)->data[i] |= 0x80; | |
1463 | } | |
7146af97 JB |
1464 | |
1465 | return result; | |
1466 | } | |
1467 | } | |
1468 | \f | |
1a4f1e2c JB |
1469 | /* Pure storage management. */ |
1470 | ||
7146af97 JB |
1471 | /* Must get an error if pure storage is full, |
1472 | since if it cannot hold a large string | |
1473 | it may be able to hold conses that point to that string; | |
1474 | then the string is not protected from gc. */ | |
1475 | ||
1476 | Lisp_Object | |
c0696668 | 1477 | make_pure_string (data, length, length_byte, multibyte) |
7146af97 JB |
1478 | char *data; |
1479 | int length; | |
3f25e183 | 1480 | int length_byte; |
c0696668 | 1481 | int multibyte; |
7146af97 | 1482 | { |
c0696668 | 1483 | |
7146af97 | 1484 | register Lisp_Object new; |
b3fd4d8f | 1485 | register int size = STRING_FULLSIZE (length_byte); |
7146af97 JB |
1486 | |
1487 | if (pureptr + size > PURESIZE) | |
1488 | error ("Pure Lisp storage exhausted"); | |
45d12a89 | 1489 | XSETSTRING (new, PUREBEG + pureptr); |
7146af97 | 1490 | XSTRING (new)->size = length; |
c0696668 | 1491 | SET_STRING_BYTES (XSTRING (new), (multibyte ? length_byte : -1)); |
3f25e183 RS |
1492 | bcopy (data, XSTRING (new)->data, length_byte); |
1493 | XSTRING (new)->data[length_byte] = 0; | |
06c5fe00 RS |
1494 | |
1495 | /* We must give strings in pure storage some kind of interval. So we | |
1496 | give them a null one. */ | |
1497 | #if defined (USE_TEXT_PROPERTIES) | |
1498 | XSTRING (new)->intervals = NULL_INTERVAL; | |
1499 | #endif | |
b3fd4d8f | 1500 | pureptr += size; |
7146af97 JB |
1501 | return new; |
1502 | } | |
1503 | ||
1504 | Lisp_Object | |
1505 | pure_cons (car, cdr) | |
1506 | Lisp_Object car, cdr; | |
1507 | { | |
1508 | register Lisp_Object new; | |
1509 | ||
1510 | if (pureptr + sizeof (struct Lisp_Cons) > PURESIZE) | |
1511 | error ("Pure Lisp storage exhausted"); | |
45d12a89 | 1512 | XSETCONS (new, PUREBEG + pureptr); |
7146af97 JB |
1513 | pureptr += sizeof (struct Lisp_Cons); |
1514 | XCONS (new)->car = Fpurecopy (car); | |
1515 | XCONS (new)->cdr = Fpurecopy (cdr); | |
1516 | return new; | |
1517 | } | |
1518 | ||
1519 | #ifdef LISP_FLOAT_TYPE | |
1520 | ||
1521 | Lisp_Object | |
1522 | make_pure_float (num) | |
1523 | double num; | |
1524 | { | |
1525 | register Lisp_Object new; | |
1526 | ||
6d19f28a JB |
1527 | /* Make sure that PUREBEG + pureptr is aligned on at least a sizeof |
1528 | (double) boundary. Some architectures (like the sparc) require | |
1529 | this, and I suspect that floats are rare enough that it's no | |
1530 | tragedy for those that do. */ | |
1531 | { | |
1532 | int alignment; | |
1533 | char *p = PUREBEG + pureptr; | |
1534 | ||
fe90ad97 JB |
1535 | #ifdef __GNUC__ |
1536 | #if __GNUC__ >= 2 | |
6d19f28a | 1537 | alignment = __alignof (struct Lisp_Float); |
fe90ad97 | 1538 | #else |
6d19f28a | 1539 | alignment = sizeof (struct Lisp_Float); |
fe90ad97 JB |
1540 | #endif |
1541 | #else | |
6d19f28a | 1542 | alignment = sizeof (struct Lisp_Float); |
fe90ad97 | 1543 | #endif |
6d19f28a JB |
1544 | p = (char *) (((unsigned long) p + alignment - 1) & - alignment); |
1545 | pureptr = p - PUREBEG; | |
1546 | } | |
1a4f1e2c | 1547 | |
7146af97 JB |
1548 | if (pureptr + sizeof (struct Lisp_Float) > PURESIZE) |
1549 | error ("Pure Lisp storage exhausted"); | |
45d12a89 | 1550 | XSETFLOAT (new, PUREBEG + pureptr); |
7146af97 JB |
1551 | pureptr += sizeof (struct Lisp_Float); |
1552 | XFLOAT (new)->data = num; | |
67ba9986 | 1553 | XSETFASTINT (XFLOAT (new)->type, 0); /* bug chasing -wsr */ |
7146af97 JB |
1554 | return new; |
1555 | } | |
1556 | ||
1557 | #endif /* LISP_FLOAT_TYPE */ | |
1558 | ||
1559 | Lisp_Object | |
1560 | make_pure_vector (len) | |
42607681 | 1561 | EMACS_INT len; |
7146af97 JB |
1562 | { |
1563 | register Lisp_Object new; | |
42607681 | 1564 | register EMACS_INT size = sizeof (struct Lisp_Vector) + (len - 1) * sizeof (Lisp_Object); |
7146af97 JB |
1565 | |
1566 | if (pureptr + size > PURESIZE) | |
1567 | error ("Pure Lisp storage exhausted"); | |
1568 | ||
45d12a89 | 1569 | XSETVECTOR (new, PUREBEG + pureptr); |
7146af97 JB |
1570 | pureptr += size; |
1571 | XVECTOR (new)->size = len; | |
1572 | return new; | |
1573 | } | |
1574 | ||
1575 | DEFUN ("purecopy", Fpurecopy, Spurecopy, 1, 1, 0, | |
1576 | "Make a copy of OBJECT in pure storage.\n\ | |
1577 | Recursively copies contents of vectors and cons cells.\n\ | |
1578 | Does not copy symbols.") | |
1579 | (obj) | |
1580 | register Lisp_Object obj; | |
1581 | { | |
265a9e55 | 1582 | if (NILP (Vpurify_flag)) |
7146af97 JB |
1583 | return obj; |
1584 | ||
1585 | if ((PNTR_COMPARISON_TYPE) XPNTR (obj) < (PNTR_COMPARISON_TYPE) ((char *) pure + PURESIZE) | |
1586 | && (PNTR_COMPARISON_TYPE) XPNTR (obj) >= (PNTR_COMPARISON_TYPE) pure) | |
1587 | return obj; | |
1588 | ||
d6dd74bb KH |
1589 | if (CONSP (obj)) |
1590 | return pure_cons (XCONS (obj)->car, XCONS (obj)->cdr); | |
7146af97 | 1591 | #ifdef LISP_FLOAT_TYPE |
d6dd74bb KH |
1592 | else if (FLOATP (obj)) |
1593 | return make_pure_float (XFLOAT (obj)->data); | |
7146af97 | 1594 | #endif /* LISP_FLOAT_TYPE */ |
d6dd74bb | 1595 | else if (STRINGP (obj)) |
3f25e183 | 1596 | return make_pure_string (XSTRING (obj)->data, XSTRING (obj)->size, |
c0696668 RS |
1597 | STRING_BYTES (XSTRING (obj)), |
1598 | STRING_MULTIBYTE (obj)); | |
d6dd74bb KH |
1599 | else if (COMPILEDP (obj) || VECTORP (obj)) |
1600 | { | |
1601 | register struct Lisp_Vector *vec; | |
1602 | register int i, size; | |
1603 | ||
1604 | size = XVECTOR (obj)->size; | |
7d535c68 KH |
1605 | if (size & PSEUDOVECTOR_FLAG) |
1606 | size &= PSEUDOVECTOR_SIZE_MASK; | |
01a4d290 | 1607 | vec = XVECTOR (make_pure_vector ((EMACS_INT) size)); |
d6dd74bb KH |
1608 | for (i = 0; i < size; i++) |
1609 | vec->contents[i] = Fpurecopy (XVECTOR (obj)->contents[i]); | |
1610 | if (COMPILEDP (obj)) | |
1611 | XSETCOMPILED (obj, vec); | |
1612 | else | |
1613 | XSETVECTOR (obj, vec); | |
7146af97 JB |
1614 | return obj; |
1615 | } | |
d6dd74bb KH |
1616 | else if (MARKERP (obj)) |
1617 | error ("Attempt to copy a marker to pure storage"); | |
1618 | else | |
1619 | return obj; | |
7146af97 JB |
1620 | } |
1621 | \f | |
1622 | /* Recording what needs to be marked for gc. */ | |
1623 | ||
1624 | struct gcpro *gcprolist; | |
1625 | ||
4cb7d267 | 1626 | #define NSTATICS 768 |
7146af97 JB |
1627 | |
1628 | Lisp_Object *staticvec[NSTATICS] = {0}; | |
1629 | ||
1630 | int staticidx = 0; | |
1631 | ||
1632 | /* Put an entry in staticvec, pointing at the variable whose address is given */ | |
1633 | ||
1634 | void | |
1635 | staticpro (varaddress) | |
1636 | Lisp_Object *varaddress; | |
1637 | { | |
1638 | staticvec[staticidx++] = varaddress; | |
1639 | if (staticidx >= NSTATICS) | |
1640 | abort (); | |
1641 | } | |
1642 | ||
1643 | struct catchtag | |
1644 | { | |
1645 | Lisp_Object tag; | |
1646 | Lisp_Object val; | |
1647 | struct catchtag *next; | |
cd67c797 KH |
1648 | #if 0 /* We don't need this for GC purposes */ |
1649 | jmp_buf jmp; | |
1650 | #endif | |
7146af97 JB |
1651 | }; |
1652 | ||
1653 | struct backtrace | |
1654 | { | |
1655 | struct backtrace *next; | |
1656 | Lisp_Object *function; | |
1657 | Lisp_Object *args; /* Points to vector of args. */ | |
1658 | int nargs; /* length of vector */ | |
1659 | /* if nargs is UNEVALLED, args points to slot holding list of unevalled args */ | |
1660 | char evalargs; | |
1661 | }; | |
7146af97 | 1662 | \f |
1a4f1e2c JB |
1663 | /* Garbage collection! */ |
1664 | ||
e8197642 RS |
1665 | /* Temporarily prevent garbage collection. */ |
1666 | ||
1667 | int | |
1668 | inhibit_garbage_collection () | |
1669 | { | |
1670 | int count = specpdl_ptr - specpdl; | |
26b926e1 | 1671 | Lisp_Object number; |
68be917d | 1672 | int nbits = min (VALBITS, BITS_PER_INT); |
e8197642 | 1673 | |
b580578b | 1674 | XSETINT (number, ((EMACS_INT) 1 << (nbits - 1)) - 1); |
26b926e1 RS |
1675 | |
1676 | specbind (Qgc_cons_threshold, number); | |
e8197642 RS |
1677 | |
1678 | return count; | |
1679 | } | |
1680 | ||
7146af97 JB |
1681 | DEFUN ("garbage-collect", Fgarbage_collect, Sgarbage_collect, 0, 0, "", |
1682 | "Reclaim storage for Lisp objects no longer needed.\n\ | |
1683 | Returns info on amount of space in use:\n\ | |
1684 | ((USED-CONSES . FREE-CONSES) (USED-SYMS . FREE-SYMS)\n\ | |
1685 | (USED-MARKERS . FREE-MARKERS) USED-STRING-CHARS USED-VECTOR-SLOTS\n\ | |
fa9e8864 | 1686 | (USED-FLOATS . FREE-FLOATS) (USED-INTERVALS . FREE-INTERVALS))\n\ |
7146af97 JB |
1687 | Garbage collection happens automatically if you cons more than\n\ |
1688 | `gc-cons-threshold' bytes of Lisp data since previous garbage collection.") | |
1689 | () | |
1690 | { | |
1691 | register struct gcpro *tail; | |
1692 | register struct specbinding *bind; | |
1693 | struct catchtag *catch; | |
1694 | struct handler *handler; | |
1695 | register struct backtrace *backlist; | |
1696 | register Lisp_Object tem; | |
1697 | char *omessage = echo_area_glyphs; | |
51056d11 | 1698 | int omessage_length = echo_area_glyphs_length; |
7da0b0d3 | 1699 | int oldmultibyte = message_enable_multibyte; |
7146af97 JB |
1700 | char stack_top_variable; |
1701 | register int i; | |
1702 | ||
58595309 KH |
1703 | /* In case user calls debug_print during GC, |
1704 | don't let that cause a recursive GC. */ | |
1705 | consing_since_gc = 0; | |
1706 | ||
7146af97 JB |
1707 | /* Save a copy of the contents of the stack, for debugging. */ |
1708 | #if MAX_SAVE_STACK > 0 | |
265a9e55 | 1709 | if (NILP (Vpurify_flag)) |
7146af97 JB |
1710 | { |
1711 | i = &stack_top_variable - stack_bottom; | |
1712 | if (i < 0) i = -i; | |
1713 | if (i < MAX_SAVE_STACK) | |
1714 | { | |
1715 | if (stack_copy == 0) | |
9ac0d9e0 | 1716 | stack_copy = (char *) xmalloc (stack_copy_size = i); |
7146af97 | 1717 | else if (stack_copy_size < i) |
9ac0d9e0 | 1718 | stack_copy = (char *) xrealloc (stack_copy, (stack_copy_size = i)); |
7146af97 JB |
1719 | if (stack_copy) |
1720 | { | |
42607681 | 1721 | if ((EMACS_INT) (&stack_top_variable - stack_bottom) > 0) |
7146af97 JB |
1722 | bcopy (stack_bottom, stack_copy, i); |
1723 | else | |
1724 | bcopy (&stack_top_variable, stack_copy, i); | |
1725 | } | |
1726 | } | |
1727 | } | |
1728 | #endif /* MAX_SAVE_STACK > 0 */ | |
1729 | ||
299585ee | 1730 | if (garbage_collection_messages) |
691c4285 | 1731 | message1_nolog ("Garbage collecting..."); |
7146af97 | 1732 | |
4929a878 | 1733 | /* Don't keep undo information around forever. */ |
7146af97 JB |
1734 | { |
1735 | register struct buffer *nextb = all_buffers; | |
1736 | ||
1737 | while (nextb) | |
1738 | { | |
ffd56f97 JB |
1739 | /* If a buffer's undo list is Qt, that means that undo is |
1740 | turned off in that buffer. Calling truncate_undo_list on | |
1741 | Qt tends to return NULL, which effectively turns undo back on. | |
1742 | So don't call truncate_undo_list if undo_list is Qt. */ | |
1743 | if (! EQ (nextb->undo_list, Qt)) | |
1744 | nextb->undo_list | |
502b9b64 JB |
1745 | = truncate_undo_list (nextb->undo_list, undo_limit, |
1746 | undo_strong_limit); | |
7146af97 JB |
1747 | nextb = nextb->next; |
1748 | } | |
1749 | } | |
1750 | ||
1751 | gc_in_progress = 1; | |
1752 | ||
c23baf9f | 1753 | /* clear_marks (); */ |
7146af97 JB |
1754 | |
1755 | /* In each "large string", set the MARKBIT of the size field. | |
1756 | That enables mark_object to recognize them. */ | |
1757 | { | |
1758 | register struct string_block *b; | |
1759 | for (b = large_string_blocks; b; b = b->next) | |
1760 | ((struct Lisp_String *)(&b->chars[0]))->size |= MARKBIT; | |
1761 | } | |
1762 | ||
1763 | /* Mark all the special slots that serve as the roots of accessibility. | |
1764 | ||
1765 | Usually the special slots to mark are contained in particular structures. | |
1766 | Then we know no slot is marked twice because the structures don't overlap. | |
1767 | In some cases, the structures point to the slots to be marked. | |
1768 | For these, we use MARKBIT to avoid double marking of the slot. */ | |
1769 | ||
1770 | for (i = 0; i < staticidx; i++) | |
1771 | mark_object (staticvec[i]); | |
1772 | for (tail = gcprolist; tail; tail = tail->next) | |
1773 | for (i = 0; i < tail->nvars; i++) | |
1774 | if (!XMARKBIT (tail->var[i])) | |
1775 | { | |
1776 | mark_object (&tail->var[i]); | |
1777 | XMARK (tail->var[i]); | |
1778 | } | |
1779 | for (bind = specpdl; bind != specpdl_ptr; bind++) | |
1780 | { | |
1781 | mark_object (&bind->symbol); | |
1782 | mark_object (&bind->old_value); | |
1783 | } | |
1784 | for (catch = catchlist; catch; catch = catch->next) | |
1785 | { | |
1786 | mark_object (&catch->tag); | |
1787 | mark_object (&catch->val); | |
1788 | } | |
1789 | for (handler = handlerlist; handler; handler = handler->next) | |
1790 | { | |
1791 | mark_object (&handler->handler); | |
1792 | mark_object (&handler->var); | |
1793 | } | |
1794 | for (backlist = backtrace_list; backlist; backlist = backlist->next) | |
1795 | { | |
1796 | if (!XMARKBIT (*backlist->function)) | |
1797 | { | |
1798 | mark_object (backlist->function); | |
1799 | XMARK (*backlist->function); | |
1800 | } | |
1801 | if (backlist->nargs == UNEVALLED || backlist->nargs == MANY) | |
1802 | i = 0; | |
1803 | else | |
1804 | i = backlist->nargs - 1; | |
1805 | for (; i >= 0; i--) | |
1806 | if (!XMARKBIT (backlist->args[i])) | |
1807 | { | |
1808 | mark_object (&backlist->args[i]); | |
1809 | XMARK (backlist->args[i]); | |
1810 | } | |
1811 | } | |
b875d3f7 | 1812 | mark_kboards (); |
7146af97 | 1813 | |
4c315bda RS |
1814 | /* Look thru every buffer's undo list |
1815 | for elements that update markers that were not marked, | |
1816 | and delete them. */ | |
1817 | { | |
1818 | register struct buffer *nextb = all_buffers; | |
1819 | ||
1820 | while (nextb) | |
1821 | { | |
1822 | /* If a buffer's undo list is Qt, that means that undo is | |
1823 | turned off in that buffer. Calling truncate_undo_list on | |
1824 | Qt tends to return NULL, which effectively turns undo back on. | |
1825 | So don't call truncate_undo_list if undo_list is Qt. */ | |
1826 | if (! EQ (nextb->undo_list, Qt)) | |
1827 | { | |
1828 | Lisp_Object tail, prev; | |
1829 | tail = nextb->undo_list; | |
1830 | prev = Qnil; | |
1831 | while (CONSP (tail)) | |
1832 | { | |
1833 | if (GC_CONSP (XCONS (tail)->car) | |
1834 | && GC_MARKERP (XCONS (XCONS (tail)->car)->car) | |
1835 | && ! XMARKBIT (XMARKER (XCONS (XCONS (tail)->car)->car)->chain)) | |
1836 | { | |
1837 | if (NILP (prev)) | |
1838 | nextb->undo_list = tail = XCONS (tail)->cdr; | |
1839 | else | |
1840 | tail = XCONS (prev)->cdr = XCONS (tail)->cdr; | |
1841 | } | |
1842 | else | |
1843 | { | |
1844 | prev = tail; | |
1845 | tail = XCONS (tail)->cdr; | |
1846 | } | |
1847 | } | |
1848 | } | |
1849 | ||
1850 | nextb = nextb->next; | |
1851 | } | |
1852 | } | |
1853 | ||
7146af97 JB |
1854 | gc_sweep (); |
1855 | ||
1856 | /* Clear the mark bits that we set in certain root slots. */ | |
1857 | ||
1858 | for (tail = gcprolist; tail; tail = tail->next) | |
1859 | for (i = 0; i < tail->nvars; i++) | |
1860 | XUNMARK (tail->var[i]); | |
1861 | for (backlist = backtrace_list; backlist; backlist = backlist->next) | |
1862 | { | |
1863 | XUNMARK (*backlist->function); | |
1864 | if (backlist->nargs == UNEVALLED || backlist->nargs == MANY) | |
1865 | i = 0; | |
1866 | else | |
1867 | i = backlist->nargs - 1; | |
1868 | for (; i >= 0; i--) | |
1869 | XUNMARK (backlist->args[i]); | |
1870 | } | |
1871 | XUNMARK (buffer_defaults.name); | |
1872 | XUNMARK (buffer_local_symbols.name); | |
1873 | ||
c23baf9f | 1874 | /* clear_marks (); */ |
7146af97 JB |
1875 | gc_in_progress = 0; |
1876 | ||
1877 | consing_since_gc = 0; | |
1878 | if (gc_cons_threshold < 10000) | |
1879 | gc_cons_threshold = 10000; | |
1880 | ||
299585ee RS |
1881 | if (garbage_collection_messages) |
1882 | { | |
1883 | if (omessage || minibuf_level > 0) | |
7da0b0d3 | 1884 | message2_nolog (omessage, omessage_length, oldmultibyte); |
299585ee RS |
1885 | else |
1886 | message1_nolog ("Garbage collecting...done"); | |
1887 | } | |
7146af97 | 1888 | |
7146af97 JB |
1889 | return Fcons (Fcons (make_number (total_conses), |
1890 | make_number (total_free_conses)), | |
1891 | Fcons (Fcons (make_number (total_symbols), | |
1892 | make_number (total_free_symbols)), | |
1893 | Fcons (Fcons (make_number (total_markers), | |
1894 | make_number (total_free_markers)), | |
1895 | Fcons (make_number (total_string_size), | |
1896 | Fcons (make_number (total_vector_size), | |
fa9e8864 | 1897 | Fcons (Fcons |
7146af97 | 1898 | #ifdef LISP_FLOAT_TYPE |
fa9e8864 RS |
1899 | (make_number (total_floats), |
1900 | make_number (total_free_floats)), | |
7146af97 | 1901 | #else /* not LISP_FLOAT_TYPE */ |
fa9e8864 | 1902 | (make_number (0), make_number (0)), |
7146af97 | 1903 | #endif /* not LISP_FLOAT_TYPE */ |
fa9e8864 RS |
1904 | Fcons (Fcons |
1905 | #ifdef USE_TEXT_PROPERTIES | |
1906 | (make_number (total_intervals), | |
1907 | make_number (total_free_intervals)), | |
1908 | #else /* not USE_TEXT_PROPERTIES */ | |
1909 | (make_number (0), make_number (0)), | |
1910 | #endif /* not USE_TEXT_PROPERTIES */ | |
1911 | Qnil))))))); | |
7146af97 JB |
1912 | } |
1913 | \f | |
1914 | #if 0 | |
1915 | static void | |
1916 | clear_marks () | |
1917 | { | |
1918 | /* Clear marks on all conses */ | |
1919 | { | |
1920 | register struct cons_block *cblk; | |
1921 | register int lim = cons_block_index; | |
1922 | ||
1923 | for (cblk = cons_block; cblk; cblk = cblk->next) | |
1924 | { | |
1925 | register int i; | |
1926 | for (i = 0; i < lim; i++) | |
1927 | XUNMARK (cblk->conses[i].car); | |
1928 | lim = CONS_BLOCK_SIZE; | |
1929 | } | |
1930 | } | |
1931 | /* Clear marks on all symbols */ | |
1932 | { | |
1933 | register struct symbol_block *sblk; | |
1934 | register int lim = symbol_block_index; | |
1935 | ||
1936 | for (sblk = symbol_block; sblk; sblk = sblk->next) | |
1937 | { | |
1938 | register int i; | |
1939 | for (i = 0; i < lim; i++) | |
1940 | { | |
1941 | XUNMARK (sblk->symbols[i].plist); | |
1942 | } | |
1943 | lim = SYMBOL_BLOCK_SIZE; | |
1944 | } | |
1945 | } | |
1946 | /* Clear marks on all markers */ | |
1947 | { | |
1948 | register struct marker_block *sblk; | |
1949 | register int lim = marker_block_index; | |
1950 | ||
1951 | for (sblk = marker_block; sblk; sblk = sblk->next) | |
1952 | { | |
1953 | register int i; | |
1954 | for (i = 0; i < lim; i++) | |
a5da44fe | 1955 | if (sblk->markers[i].u_marker.type == Lisp_Misc_Marker) |
a0a38eb7 | 1956 | XUNMARK (sblk->markers[i].u_marker.chain); |
7146af97 JB |
1957 | lim = MARKER_BLOCK_SIZE; |
1958 | } | |
1959 | } | |
1960 | /* Clear mark bits on all buffers */ | |
1961 | { | |
1962 | register struct buffer *nextb = all_buffers; | |
1963 | ||
1964 | while (nextb) | |
1965 | { | |
1966 | XUNMARK (nextb->name); | |
1967 | nextb = nextb->next; | |
1968 | } | |
1969 | } | |
1970 | } | |
1971 | #endif | |
1972 | \f | |
1a4f1e2c JB |
1973 | /* Mark reference to a Lisp_Object. |
1974 | If the object referred to has not been seen yet, recursively mark | |
1975 | all the references contained in it. | |
7146af97 | 1976 | |
eb8c3be9 | 1977 | If the object referenced is a short string, the referencing slot |
7146af97 JB |
1978 | is threaded into a chain of such slots, pointed to from |
1979 | the `size' field of the string. The actual string size | |
1980 | lives in the last slot in the chain. We recognize the end | |
1981 | because it is < (unsigned) STRING_BLOCK_SIZE. */ | |
1982 | ||
785cd37f RS |
1983 | #define LAST_MARKED_SIZE 500 |
1984 | Lisp_Object *last_marked[LAST_MARKED_SIZE]; | |
1985 | int last_marked_index; | |
1986 | ||
7146af97 | 1987 | static void |
436c5811 RS |
1988 | mark_object (argptr) |
1989 | Lisp_Object *argptr; | |
7146af97 | 1990 | { |
436c5811 | 1991 | Lisp_Object *objptr = argptr; |
7146af97 JB |
1992 | register Lisp_Object obj; |
1993 | ||
9149e743 | 1994 | loop: |
7146af97 | 1995 | obj = *objptr; |
9149e743 | 1996 | loop2: |
7146af97 JB |
1997 | XUNMARK (obj); |
1998 | ||
7146af97 JB |
1999 | if ((PNTR_COMPARISON_TYPE) XPNTR (obj) < (PNTR_COMPARISON_TYPE) ((char *) pure + PURESIZE) |
2000 | && (PNTR_COMPARISON_TYPE) XPNTR (obj) >= (PNTR_COMPARISON_TYPE) pure) | |
2001 | return; | |
2002 | ||
785cd37f RS |
2003 | last_marked[last_marked_index++] = objptr; |
2004 | if (last_marked_index == LAST_MARKED_SIZE) | |
2005 | last_marked_index = 0; | |
2006 | ||
0220c518 | 2007 | switch (SWITCH_ENUM_CAST (XGCTYPE (obj))) |
7146af97 JB |
2008 | { |
2009 | case Lisp_String: | |
2010 | { | |
2011 | register struct Lisp_String *ptr = XSTRING (obj); | |
2012 | ||
d5e35230 | 2013 | MARK_INTERVAL_TREE (ptr->intervals); |
7146af97 JB |
2014 | if (ptr->size & MARKBIT) |
2015 | /* A large string. Just set ARRAY_MARK_FLAG. */ | |
2016 | ptr->size |= ARRAY_MARK_FLAG; | |
2017 | else | |
2018 | { | |
2019 | /* A small string. Put this reference | |
2020 | into the chain of references to it. | |
1fb577f7 | 2021 | If the address includes MARKBIT, put that bit elsewhere |
7146af97 JB |
2022 | when we store OBJPTR into the size field. */ |
2023 | ||
2024 | if (XMARKBIT (*objptr)) | |
2025 | { | |
67ba9986 | 2026 | XSETFASTINT (*objptr, ptr->size); |
7146af97 JB |
2027 | XMARK (*objptr); |
2028 | } | |
2029 | else | |
67ba9986 | 2030 | XSETFASTINT (*objptr, ptr->size); |
155ffe9c RS |
2031 | |
2032 | if ((EMACS_INT) objptr & DONT_COPY_FLAG) | |
2033 | abort (); | |
1fb577f7 KH |
2034 | ptr->size = (EMACS_INT) objptr; |
2035 | if (ptr->size & MARKBIT) | |
2036 | ptr->size ^= MARKBIT | DONT_COPY_FLAG; | |
7146af97 JB |
2037 | } |
2038 | } | |
2039 | break; | |
2040 | ||
76437631 | 2041 | case Lisp_Vectorlike: |
30e3190a | 2042 | if (GC_BUFFERP (obj)) |
6b552283 KH |
2043 | { |
2044 | if (!XMARKBIT (XBUFFER (obj)->name)) | |
2045 | mark_buffer (obj); | |
2046 | } | |
30e3190a | 2047 | else if (GC_SUBRP (obj)) |
169ee243 RS |
2048 | break; |
2049 | else if (GC_COMPILEDP (obj)) | |
2050 | /* We could treat this just like a vector, but it is better | |
2051 | to save the COMPILED_CONSTANTS element for last and avoid recursion | |
2052 | there. */ | |
2053 | { | |
2054 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
2055 | register EMACS_INT size = ptr->size; | |
2056 | /* See comment above under Lisp_Vector. */ | |
2057 | struct Lisp_Vector *volatile ptr1 = ptr; | |
2058 | register int i; | |
2059 | ||
2060 | if (size & ARRAY_MARK_FLAG) | |
2061 | break; /* Already marked */ | |
2062 | ptr->size |= ARRAY_MARK_FLAG; /* Else mark it */ | |
76437631 | 2063 | size &= PSEUDOVECTOR_SIZE_MASK; |
169ee243 RS |
2064 | for (i = 0; i < size; i++) /* and then mark its elements */ |
2065 | { | |
2066 | if (i != COMPILED_CONSTANTS) | |
2067 | mark_object (&ptr1->contents[i]); | |
2068 | } | |
2069 | /* This cast should be unnecessary, but some Mips compiler complains | |
2070 | (MIPS-ABI + SysVR4, DC/OSx, etc). */ | |
2071 | objptr = (Lisp_Object *) &ptr1->contents[COMPILED_CONSTANTS]; | |
2072 | goto loop; | |
2073 | } | |
169ee243 RS |
2074 | else if (GC_FRAMEP (obj)) |
2075 | { | |
2076 | /* See comment above under Lisp_Vector for why this is volatile. */ | |
2077 | register struct frame *volatile ptr = XFRAME (obj); | |
2078 | register EMACS_INT size = ptr->size; | |
2079 | ||
2080 | if (size & ARRAY_MARK_FLAG) break; /* Already marked */ | |
2081 | ptr->size |= ARRAY_MARK_FLAG; /* Else mark it */ | |
2082 | ||
2083 | mark_object (&ptr->name); | |
894a9d16 | 2084 | mark_object (&ptr->icon_name); |
aba6deb8 | 2085 | mark_object (&ptr->title); |
169ee243 RS |
2086 | mark_object (&ptr->focus_frame); |
2087 | mark_object (&ptr->selected_window); | |
2088 | mark_object (&ptr->minibuffer_window); | |
2089 | mark_object (&ptr->param_alist); | |
2090 | mark_object (&ptr->scroll_bars); | |
2091 | mark_object (&ptr->condemned_scroll_bars); | |
2092 | mark_object (&ptr->menu_bar_items); | |
2093 | mark_object (&ptr->face_alist); | |
2094 | mark_object (&ptr->menu_bar_vector); | |
2095 | mark_object (&ptr->buffer_predicate); | |
a0e1f185 | 2096 | mark_object (&ptr->buffer_list); |
169ee243 | 2097 | } |
7b07587b | 2098 | else if (GC_BOOL_VECTOR_P (obj)) |
707788bd RS |
2099 | { |
2100 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
2101 | ||
2102 | if (ptr->size & ARRAY_MARK_FLAG) | |
2103 | break; /* Already marked */ | |
2104 | ptr->size |= ARRAY_MARK_FLAG; /* Else mark it */ | |
2105 | } | |
04ff9756 | 2106 | else |
169ee243 RS |
2107 | { |
2108 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
2109 | register EMACS_INT size = ptr->size; | |
2110 | /* The reason we use ptr1 is to avoid an apparent hardware bug | |
2111 | that happens occasionally on the FSF's HP 300s. | |
2112 | The bug is that a2 gets clobbered by recursive calls to mark_object. | |
2113 | The clobberage seems to happen during function entry, | |
2114 | perhaps in the moveml instruction. | |
2115 | Yes, this is a crock, but we have to do it. */ | |
2116 | struct Lisp_Vector *volatile ptr1 = ptr; | |
2117 | register int i; | |
2118 | ||
2119 | if (size & ARRAY_MARK_FLAG) break; /* Already marked */ | |
2120 | ptr->size |= ARRAY_MARK_FLAG; /* Else mark it */ | |
2121 | if (size & PSEUDOVECTOR_FLAG) | |
2122 | size &= PSEUDOVECTOR_SIZE_MASK; | |
2123 | for (i = 0; i < size; i++) /* and then mark its elements */ | |
2124 | mark_object (&ptr1->contents[i]); | |
2125 | } | |
2126 | break; | |
7146af97 | 2127 | |
7146af97 JB |
2128 | case Lisp_Symbol: |
2129 | { | |
41f54422 RS |
2130 | /* See comment above under Lisp_Vector for why this is volatile. */ |
2131 | register struct Lisp_Symbol *volatile ptr = XSYMBOL (obj); | |
7146af97 JB |
2132 | struct Lisp_Symbol *ptrx; |
2133 | ||
2134 | if (XMARKBIT (ptr->plist)) break; | |
2135 | XMARK (ptr->plist); | |
7146af97 JB |
2136 | mark_object ((Lisp_Object *) &ptr->value); |
2137 | mark_object (&ptr->function); | |
2138 | mark_object (&ptr->plist); | |
8aaa7c8a JB |
2139 | XSETTYPE (*(Lisp_Object *) &ptr->name, Lisp_String); |
2140 | mark_object (&ptr->name); | |
1c6bb482 RS |
2141 | /* Note that we do not mark the obarray of the symbol. |
2142 | It is safe not to do so because nothing accesses that | |
2143 | slot except to check whether it is nil. */ | |
7146af97 JB |
2144 | ptr = ptr->next; |
2145 | if (ptr) | |
2146 | { | |
9149e743 KH |
2147 | /* For the benefit of the last_marked log. */ |
2148 | objptr = (Lisp_Object *)&XSYMBOL (obj)->next; | |
b0846f52 | 2149 | ptrx = ptr; /* Use of ptrx avoids compiler bug on Sun */ |
7146af97 | 2150 | XSETSYMBOL (obj, ptrx); |
9149e743 KH |
2151 | /* We can't goto loop here because *objptr doesn't contain an |
2152 | actual Lisp_Object with valid datatype field. */ | |
2153 | goto loop2; | |
7146af97 JB |
2154 | } |
2155 | } | |
2156 | break; | |
2157 | ||
a0a38eb7 | 2158 | case Lisp_Misc: |
a5da44fe | 2159 | switch (XMISCTYPE (obj)) |
a0a38eb7 KH |
2160 | { |
2161 | case Lisp_Misc_Marker: | |
2162 | XMARK (XMARKER (obj)->chain); | |
2163 | /* DO NOT mark thru the marker's chain. | |
2164 | The buffer's markers chain does not preserve markers from gc; | |
2165 | instead, markers are removed from the chain when freed by gc. */ | |
2166 | break; | |
2167 | ||
465edf35 KH |
2168 | case Lisp_Misc_Buffer_Local_Value: |
2169 | case Lisp_Misc_Some_Buffer_Local_Value: | |
2170 | { | |
2171 | register struct Lisp_Buffer_Local_Value *ptr | |
2172 | = XBUFFER_LOCAL_VALUE (obj); | |
a9faeabe RS |
2173 | if (XMARKBIT (ptr->realvalue)) break; |
2174 | XMARK (ptr->realvalue); | |
465edf35 KH |
2175 | /* If the cdr is nil, avoid recursion for the car. */ |
2176 | if (EQ (ptr->cdr, Qnil)) | |
2177 | { | |
a9faeabe | 2178 | objptr = &ptr->realvalue; |
465edf35 KH |
2179 | goto loop; |
2180 | } | |
a9faeabe RS |
2181 | mark_object (&ptr->realvalue); |
2182 | mark_object (&ptr->buffer); | |
2183 | mark_object (&ptr->frame); | |
465edf35 KH |
2184 | /* See comment above under Lisp_Vector for why not use ptr here. */ |
2185 | objptr = &XBUFFER_LOCAL_VALUE (obj)->cdr; | |
2186 | goto loop; | |
2187 | } | |
2188 | ||
c8616056 KH |
2189 | case Lisp_Misc_Intfwd: |
2190 | case Lisp_Misc_Boolfwd: | |
2191 | case Lisp_Misc_Objfwd: | |
2192 | case Lisp_Misc_Buffer_Objfwd: | |
b875d3f7 | 2193 | case Lisp_Misc_Kboard_Objfwd: |
c8616056 KH |
2194 | /* Don't bother with Lisp_Buffer_Objfwd, |
2195 | since all markable slots in current buffer marked anyway. */ | |
2196 | /* Don't need to do Lisp_Objfwd, since the places they point | |
2197 | are protected with staticpro. */ | |
2198 | break; | |
2199 | ||
e202fa34 KH |
2200 | case Lisp_Misc_Overlay: |
2201 | { | |
2202 | struct Lisp_Overlay *ptr = XOVERLAY (obj); | |
2203 | if (!XMARKBIT (ptr->plist)) | |
2204 | { | |
2205 | XMARK (ptr->plist); | |
2206 | mark_object (&ptr->start); | |
2207 | mark_object (&ptr->end); | |
2208 | objptr = &ptr->plist; | |
2209 | goto loop; | |
2210 | } | |
2211 | } | |
2212 | break; | |
2213 | ||
a0a38eb7 KH |
2214 | default: |
2215 | abort (); | |
2216 | } | |
7146af97 JB |
2217 | break; |
2218 | ||
2219 | case Lisp_Cons: | |
7146af97 JB |
2220 | { |
2221 | register struct Lisp_Cons *ptr = XCONS (obj); | |
2222 | if (XMARKBIT (ptr->car)) break; | |
2223 | XMARK (ptr->car); | |
c54ca951 RS |
2224 | /* If the cdr is nil, avoid recursion for the car. */ |
2225 | if (EQ (ptr->cdr, Qnil)) | |
2226 | { | |
2227 | objptr = &ptr->car; | |
c54ca951 RS |
2228 | goto loop; |
2229 | } | |
7146af97 | 2230 | mark_object (&ptr->car); |
41f54422 RS |
2231 | /* See comment above under Lisp_Vector for why not use ptr here. */ |
2232 | objptr = &XCONS (obj)->cdr; | |
7146af97 JB |
2233 | goto loop; |
2234 | } | |
2235 | ||
2236 | #ifdef LISP_FLOAT_TYPE | |
2237 | case Lisp_Float: | |
2238 | XMARK (XFLOAT (obj)->type); | |
2239 | break; | |
2240 | #endif /* LISP_FLOAT_TYPE */ | |
2241 | ||
7146af97 | 2242 | case Lisp_Int: |
7146af97 JB |
2243 | break; |
2244 | ||
2245 | default: | |
2246 | abort (); | |
2247 | } | |
2248 | } | |
2249 | ||
2250 | /* Mark the pointers in a buffer structure. */ | |
2251 | ||
2252 | static void | |
2253 | mark_buffer (buf) | |
2254 | Lisp_Object buf; | |
2255 | { | |
7146af97 JB |
2256 | register struct buffer *buffer = XBUFFER (buf); |
2257 | register Lisp_Object *ptr; | |
30e3190a | 2258 | Lisp_Object base_buffer; |
7146af97 JB |
2259 | |
2260 | /* This is the buffer's markbit */ | |
2261 | mark_object (&buffer->name); | |
2262 | XMARK (buffer->name); | |
2263 | ||
30e3190a | 2264 | MARK_INTERVAL_TREE (BUF_INTERVALS (buffer)); |
d5e35230 | 2265 | |
4c315bda RS |
2266 | if (CONSP (buffer->undo_list)) |
2267 | { | |
2268 | Lisp_Object tail; | |
2269 | tail = buffer->undo_list; | |
2270 | ||
2271 | while (CONSP (tail)) | |
2272 | { | |
2273 | register struct Lisp_Cons *ptr = XCONS (tail); | |
2274 | ||
2275 | if (XMARKBIT (ptr->car)) | |
2276 | break; | |
2277 | XMARK (ptr->car); | |
2278 | if (GC_CONSP (ptr->car) | |
2279 | && ! XMARKBIT (XCONS (ptr->car)->car) | |
2280 | && GC_MARKERP (XCONS (ptr->car)->car)) | |
2281 | { | |
2282 | XMARK (XCONS (ptr->car)->car); | |
2283 | mark_object (&XCONS (ptr->car)->cdr); | |
2284 | } | |
2285 | else | |
2286 | mark_object (&ptr->car); | |
2287 | ||
2288 | if (CONSP (ptr->cdr)) | |
2289 | tail = ptr->cdr; | |
2290 | else | |
2291 | break; | |
2292 | } | |
2293 | ||
2294 | mark_object (&XCONS (tail)->cdr); | |
2295 | } | |
2296 | else | |
2297 | mark_object (&buffer->undo_list); | |
2298 | ||
7146af97 JB |
2299 | #if 0 |
2300 | mark_object (buffer->syntax_table); | |
2301 | ||
2302 | /* Mark the various string-pointers in the buffer object. | |
2303 | Since the strings may be relocated, we must mark them | |
2304 | in their actual slots. So gc_sweep must convert each slot | |
2305 | back to an ordinary C pointer. */ | |
45d12a89 | 2306 | XSETSTRING (*(Lisp_Object *)&buffer->upcase_table, buffer->upcase_table); |
7146af97 | 2307 | mark_object ((Lisp_Object *)&buffer->upcase_table); |
45d12a89 | 2308 | XSETSTRING (*(Lisp_Object *)&buffer->downcase_table, buffer->downcase_table); |
7146af97 JB |
2309 | mark_object ((Lisp_Object *)&buffer->downcase_table); |
2310 | ||
45d12a89 | 2311 | XSETSTRING (*(Lisp_Object *)&buffer->sort_table, buffer->sort_table); |
7146af97 | 2312 | mark_object ((Lisp_Object *)&buffer->sort_table); |
45d12a89 | 2313 | XSETSTRING (*(Lisp_Object *)&buffer->folding_sort_table, buffer->folding_sort_table); |
7146af97 JB |
2314 | mark_object ((Lisp_Object *)&buffer->folding_sort_table); |
2315 | #endif | |
2316 | ||
2317 | for (ptr = &buffer->name + 1; | |
2318 | (char *)ptr < (char *)buffer + sizeof (struct buffer); | |
2319 | ptr++) | |
2320 | mark_object (ptr); | |
30e3190a RS |
2321 | |
2322 | /* If this is an indirect buffer, mark its base buffer. */ | |
6b552283 | 2323 | if (buffer->base_buffer && !XMARKBIT (buffer->base_buffer->name)) |
30e3190a RS |
2324 | { |
2325 | XSETBUFFER (base_buffer, buffer->base_buffer); | |
2326 | mark_buffer (base_buffer); | |
2327 | } | |
7146af97 | 2328 | } |
084b1a0c KH |
2329 | |
2330 | ||
b875d3f7 | 2331 | /* Mark the pointers in the kboard objects. */ |
084b1a0c KH |
2332 | |
2333 | static void | |
b875d3f7 | 2334 | mark_kboards () |
084b1a0c | 2335 | { |
b875d3f7 | 2336 | KBOARD *kb; |
b94daf1e | 2337 | Lisp_Object *p; |
b875d3f7 | 2338 | for (kb = all_kboards; kb; kb = kb->next_kboard) |
084b1a0c | 2339 | { |
b94daf1e KH |
2340 | if (kb->kbd_macro_buffer) |
2341 | for (p = kb->kbd_macro_buffer; p < kb->kbd_macro_ptr; p++) | |
2342 | mark_object (p); | |
9671abc2 | 2343 | mark_object (&kb->Vprefix_arg); |
b875d3f7 KH |
2344 | mark_object (&kb->kbd_queue); |
2345 | mark_object (&kb->Vlast_kbd_macro); | |
b94daf1e | 2346 | mark_object (&kb->Vsystem_key_alist); |
6d03a6fd | 2347 | mark_object (&kb->system_key_syms); |
084b1a0c KH |
2348 | } |
2349 | } | |
7146af97 | 2350 | \f |
1a4f1e2c | 2351 | /* Sweep: find all structures not marked, and free them. */ |
7146af97 JB |
2352 | |
2353 | static void | |
2354 | gc_sweep () | |
2355 | { | |
2356 | total_string_size = 0; | |
2357 | compact_strings (); | |
2358 | ||
2359 | /* Put all unmarked conses on free list */ | |
2360 | { | |
2361 | register struct cons_block *cblk; | |
6ca94ac9 | 2362 | struct cons_block **cprev = &cons_block; |
7146af97 JB |
2363 | register int lim = cons_block_index; |
2364 | register int num_free = 0, num_used = 0; | |
2365 | ||
2366 | cons_free_list = 0; | |
2367 | ||
6ca94ac9 | 2368 | for (cblk = cons_block; cblk; cblk = *cprev) |
7146af97 JB |
2369 | { |
2370 | register int i; | |
6ca94ac9 | 2371 | int this_free = 0; |
7146af97 JB |
2372 | for (i = 0; i < lim; i++) |
2373 | if (!XMARKBIT (cblk->conses[i].car)) | |
2374 | { | |
6ca94ac9 | 2375 | this_free++; |
1cd5fe6a | 2376 | *(struct Lisp_Cons **)&cblk->conses[i].cdr = cons_free_list; |
7146af97 JB |
2377 | cons_free_list = &cblk->conses[i]; |
2378 | } | |
2379 | else | |
2380 | { | |
2381 | num_used++; | |
2382 | XUNMARK (cblk->conses[i].car); | |
2383 | } | |
2384 | lim = CONS_BLOCK_SIZE; | |
6ca94ac9 KH |
2385 | /* If this block contains only free conses and we have already |
2386 | seen more than two blocks worth of free conses then deallocate | |
2387 | this block. */ | |
6feef451 | 2388 | if (this_free == CONS_BLOCK_SIZE && num_free > CONS_BLOCK_SIZE) |
6ca94ac9 | 2389 | { |
6ca94ac9 KH |
2390 | *cprev = cblk->next; |
2391 | /* Unhook from the free list. */ | |
2392 | cons_free_list = *(struct Lisp_Cons **) &cblk->conses[0].cdr; | |
2393 | xfree (cblk); | |
2394 | } | |
2395 | else | |
6feef451 AS |
2396 | { |
2397 | num_free += this_free; | |
2398 | cprev = &cblk->next; | |
2399 | } | |
7146af97 JB |
2400 | } |
2401 | total_conses = num_used; | |
2402 | total_free_conses = num_free; | |
2403 | } | |
2404 | ||
2405 | #ifdef LISP_FLOAT_TYPE | |
2406 | /* Put all unmarked floats on free list */ | |
2407 | { | |
2408 | register struct float_block *fblk; | |
6ca94ac9 | 2409 | struct float_block **fprev = &float_block; |
7146af97 JB |
2410 | register int lim = float_block_index; |
2411 | register int num_free = 0, num_used = 0; | |
2412 | ||
2413 | float_free_list = 0; | |
2414 | ||
6ca94ac9 | 2415 | for (fblk = float_block; fblk; fblk = *fprev) |
7146af97 JB |
2416 | { |
2417 | register int i; | |
6ca94ac9 | 2418 | int this_free = 0; |
7146af97 JB |
2419 | for (i = 0; i < lim; i++) |
2420 | if (!XMARKBIT (fblk->floats[i].type)) | |
2421 | { | |
6ca94ac9 | 2422 | this_free++; |
1cd5fe6a | 2423 | *(struct Lisp_Float **)&fblk->floats[i].data = float_free_list; |
7146af97 JB |
2424 | float_free_list = &fblk->floats[i]; |
2425 | } | |
2426 | else | |
2427 | { | |
2428 | num_used++; | |
2429 | XUNMARK (fblk->floats[i].type); | |
2430 | } | |
2431 | lim = FLOAT_BLOCK_SIZE; | |
6ca94ac9 KH |
2432 | /* If this block contains only free floats and we have already |
2433 | seen more than two blocks worth of free floats then deallocate | |
2434 | this block. */ | |
6feef451 | 2435 | if (this_free == FLOAT_BLOCK_SIZE && num_free > FLOAT_BLOCK_SIZE) |
6ca94ac9 | 2436 | { |
6ca94ac9 KH |
2437 | *fprev = fblk->next; |
2438 | /* Unhook from the free list. */ | |
2439 | float_free_list = *(struct Lisp_Float **) &fblk->floats[0].data; | |
2440 | xfree (fblk); | |
2441 | } | |
2442 | else | |
6feef451 AS |
2443 | { |
2444 | num_free += this_free; | |
2445 | fprev = &fblk->next; | |
2446 | } | |
7146af97 JB |
2447 | } |
2448 | total_floats = num_used; | |
2449 | total_free_floats = num_free; | |
2450 | } | |
2451 | #endif /* LISP_FLOAT_TYPE */ | |
2452 | ||
d5e35230 JA |
2453 | #ifdef USE_TEXT_PROPERTIES |
2454 | /* Put all unmarked intervals on free list */ | |
2455 | { | |
2456 | register struct interval_block *iblk; | |
6ca94ac9 | 2457 | struct interval_block **iprev = &interval_block; |
d5e35230 JA |
2458 | register int lim = interval_block_index; |
2459 | register int num_free = 0, num_used = 0; | |
2460 | ||
2461 | interval_free_list = 0; | |
2462 | ||
6ca94ac9 | 2463 | for (iblk = interval_block; iblk; iblk = *iprev) |
d5e35230 JA |
2464 | { |
2465 | register int i; | |
6ca94ac9 | 2466 | int this_free = 0; |
d5e35230 JA |
2467 | |
2468 | for (i = 0; i < lim; i++) | |
2469 | { | |
2470 | if (! XMARKBIT (iblk->intervals[i].plist)) | |
2471 | { | |
2472 | iblk->intervals[i].parent = interval_free_list; | |
2473 | interval_free_list = &iblk->intervals[i]; | |
6ca94ac9 | 2474 | this_free++; |
d5e35230 JA |
2475 | } |
2476 | else | |
2477 | { | |
2478 | num_used++; | |
2479 | XUNMARK (iblk->intervals[i].plist); | |
2480 | } | |
2481 | } | |
2482 | lim = INTERVAL_BLOCK_SIZE; | |
6ca94ac9 KH |
2483 | /* If this block contains only free intervals and we have already |
2484 | seen more than two blocks worth of free intervals then | |
2485 | deallocate this block. */ | |
6feef451 | 2486 | if (this_free == INTERVAL_BLOCK_SIZE && num_free > INTERVAL_BLOCK_SIZE) |
6ca94ac9 | 2487 | { |
6ca94ac9 KH |
2488 | *iprev = iblk->next; |
2489 | /* Unhook from the free list. */ | |
2490 | interval_free_list = iblk->intervals[0].parent; | |
2491 | xfree (iblk); | |
2492 | } | |
2493 | else | |
6feef451 AS |
2494 | { |
2495 | num_free += this_free; | |
2496 | iprev = &iblk->next; | |
2497 | } | |
d5e35230 JA |
2498 | } |
2499 | total_intervals = num_used; | |
2500 | total_free_intervals = num_free; | |
2501 | } | |
2502 | #endif /* USE_TEXT_PROPERTIES */ | |
2503 | ||
7146af97 JB |
2504 | /* Put all unmarked symbols on free list */ |
2505 | { | |
2506 | register struct symbol_block *sblk; | |
6ca94ac9 | 2507 | struct symbol_block **sprev = &symbol_block; |
7146af97 JB |
2508 | register int lim = symbol_block_index; |
2509 | register int num_free = 0, num_used = 0; | |
2510 | ||
2511 | symbol_free_list = 0; | |
2512 | ||
6ca94ac9 | 2513 | for (sblk = symbol_block; sblk; sblk = *sprev) |
7146af97 JB |
2514 | { |
2515 | register int i; | |
6ca94ac9 | 2516 | int this_free = 0; |
7146af97 JB |
2517 | for (i = 0; i < lim; i++) |
2518 | if (!XMARKBIT (sblk->symbols[i].plist)) | |
2519 | { | |
85481507 | 2520 | *(struct Lisp_Symbol **)&sblk->symbols[i].value = symbol_free_list; |
7146af97 | 2521 | symbol_free_list = &sblk->symbols[i]; |
6ca94ac9 | 2522 | this_free++; |
7146af97 JB |
2523 | } |
2524 | else | |
2525 | { | |
2526 | num_used++; | |
2527 | sblk->symbols[i].name | |
2528 | = XSTRING (*(Lisp_Object *) &sblk->symbols[i].name); | |
2529 | XUNMARK (sblk->symbols[i].plist); | |
2530 | } | |
2531 | lim = SYMBOL_BLOCK_SIZE; | |
6ca94ac9 KH |
2532 | /* If this block contains only free symbols and we have already |
2533 | seen more than two blocks worth of free symbols then deallocate | |
2534 | this block. */ | |
6feef451 | 2535 | if (this_free == SYMBOL_BLOCK_SIZE && num_free > SYMBOL_BLOCK_SIZE) |
6ca94ac9 | 2536 | { |
6ca94ac9 KH |
2537 | *sprev = sblk->next; |
2538 | /* Unhook from the free list. */ | |
2539 | symbol_free_list = *(struct Lisp_Symbol **)&sblk->symbols[0].value; | |
2540 | xfree (sblk); | |
2541 | } | |
2542 | else | |
6feef451 AS |
2543 | { |
2544 | num_free += this_free; | |
2545 | sprev = &sblk->next; | |
2546 | } | |
7146af97 JB |
2547 | } |
2548 | total_symbols = num_used; | |
2549 | total_free_symbols = num_free; | |
2550 | } | |
2551 | ||
2552 | #ifndef standalone | |
a9faeabe RS |
2553 | /* Put all unmarked misc's on free list. |
2554 | For a marker, first unchain it from the buffer it points into. */ | |
7146af97 JB |
2555 | { |
2556 | register struct marker_block *mblk; | |
6ca94ac9 | 2557 | struct marker_block **mprev = &marker_block; |
7146af97 JB |
2558 | register int lim = marker_block_index; |
2559 | register int num_free = 0, num_used = 0; | |
2560 | ||
2561 | marker_free_list = 0; | |
2562 | ||
6ca94ac9 | 2563 | for (mblk = marker_block; mblk; mblk = *mprev) |
7146af97 JB |
2564 | { |
2565 | register int i; | |
6ca94ac9 | 2566 | int this_free = 0; |
26b926e1 | 2567 | EMACS_INT already_free = -1; |
fa05e253 | 2568 | |
7146af97 | 2569 | for (i = 0; i < lim; i++) |
465edf35 KH |
2570 | { |
2571 | Lisp_Object *markword; | |
a5da44fe | 2572 | switch (mblk->markers[i].u_marker.type) |
465edf35 KH |
2573 | { |
2574 | case Lisp_Misc_Marker: | |
2575 | markword = &mblk->markers[i].u_marker.chain; | |
2576 | break; | |
2577 | case Lisp_Misc_Buffer_Local_Value: | |
2578 | case Lisp_Misc_Some_Buffer_Local_Value: | |
a9faeabe | 2579 | markword = &mblk->markers[i].u_buffer_local_value.realvalue; |
465edf35 | 2580 | break; |
e202fa34 KH |
2581 | case Lisp_Misc_Overlay: |
2582 | markword = &mblk->markers[i].u_overlay.plist; | |
2583 | break; | |
fa05e253 RS |
2584 | case Lisp_Misc_Free: |
2585 | /* If the object was already free, keep it | |
2586 | on the free list. */ | |
74d84334 | 2587 | markword = (Lisp_Object *) &already_free; |
fa05e253 | 2588 | break; |
465edf35 KH |
2589 | default: |
2590 | markword = 0; | |
e202fa34 | 2591 | break; |
465edf35 KH |
2592 | } |
2593 | if (markword && !XMARKBIT (*markword)) | |
2594 | { | |
2595 | Lisp_Object tem; | |
a5da44fe | 2596 | if (mblk->markers[i].u_marker.type == Lisp_Misc_Marker) |
465edf35 KH |
2597 | { |
2598 | /* tem1 avoids Sun compiler bug */ | |
2599 | struct Lisp_Marker *tem1 = &mblk->markers[i].u_marker; | |
2600 | XSETMARKER (tem, tem1); | |
2601 | unchain_marker (tem); | |
2602 | } | |
fa05e253 RS |
2603 | /* Set the type of the freed object to Lisp_Misc_Free. |
2604 | We could leave the type alone, since nobody checks it, | |
465edf35 | 2605 | but this might catch bugs faster. */ |
a5da44fe | 2606 | mblk->markers[i].u_marker.type = Lisp_Misc_Free; |
465edf35 KH |
2607 | mblk->markers[i].u_free.chain = marker_free_list; |
2608 | marker_free_list = &mblk->markers[i]; | |
6ca94ac9 | 2609 | this_free++; |
465edf35 KH |
2610 | } |
2611 | else | |
2612 | { | |
2613 | num_used++; | |
2614 | if (markword) | |
2615 | XUNMARK (*markword); | |
2616 | } | |
2617 | } | |
7146af97 | 2618 | lim = MARKER_BLOCK_SIZE; |
6ca94ac9 KH |
2619 | /* If this block contains only free markers and we have already |
2620 | seen more than two blocks worth of free markers then deallocate | |
2621 | this block. */ | |
6feef451 | 2622 | if (this_free == MARKER_BLOCK_SIZE && num_free > MARKER_BLOCK_SIZE) |
6ca94ac9 | 2623 | { |
6ca94ac9 KH |
2624 | *mprev = mblk->next; |
2625 | /* Unhook from the free list. */ | |
2626 | marker_free_list = mblk->markers[0].u_free.chain; | |
2627 | xfree (mblk); | |
2628 | } | |
2629 | else | |
6feef451 AS |
2630 | { |
2631 | num_free += this_free; | |
2632 | mprev = &mblk->next; | |
2633 | } | |
7146af97 JB |
2634 | } |
2635 | ||
2636 | total_markers = num_used; | |
2637 | total_free_markers = num_free; | |
2638 | } | |
2639 | ||
2640 | /* Free all unmarked buffers */ | |
2641 | { | |
2642 | register struct buffer *buffer = all_buffers, *prev = 0, *next; | |
2643 | ||
2644 | while (buffer) | |
2645 | if (!XMARKBIT (buffer->name)) | |
2646 | { | |
2647 | if (prev) | |
2648 | prev->next = buffer->next; | |
2649 | else | |
2650 | all_buffers = buffer->next; | |
2651 | next = buffer->next; | |
9ac0d9e0 | 2652 | xfree (buffer); |
7146af97 JB |
2653 | buffer = next; |
2654 | } | |
2655 | else | |
2656 | { | |
2657 | XUNMARK (buffer->name); | |
30e3190a | 2658 | UNMARK_BALANCE_INTERVALS (BUF_INTERVALS (buffer)); |
7146af97 JB |
2659 | |
2660 | #if 0 | |
2661 | /* Each `struct Lisp_String *' was turned into a Lisp_Object | |
2662 | for purposes of marking and relocation. | |
2663 | Turn them back into C pointers now. */ | |
2664 | buffer->upcase_table | |
2665 | = XSTRING (*(Lisp_Object *)&buffer->upcase_table); | |
2666 | buffer->downcase_table | |
2667 | = XSTRING (*(Lisp_Object *)&buffer->downcase_table); | |
2668 | buffer->sort_table | |
2669 | = XSTRING (*(Lisp_Object *)&buffer->sort_table); | |
2670 | buffer->folding_sort_table | |
2671 | = XSTRING (*(Lisp_Object *)&buffer->folding_sort_table); | |
2672 | #endif | |
2673 | ||
2674 | prev = buffer, buffer = buffer->next; | |
2675 | } | |
2676 | } | |
2677 | ||
2678 | #endif /* standalone */ | |
2679 | ||
2680 | /* Free all unmarked vectors */ | |
2681 | { | |
2682 | register struct Lisp_Vector *vector = all_vectors, *prev = 0, *next; | |
2683 | total_vector_size = 0; | |
2684 | ||
2685 | while (vector) | |
2686 | if (!(vector->size & ARRAY_MARK_FLAG)) | |
2687 | { | |
2688 | if (prev) | |
2689 | prev->next = vector->next; | |
2690 | else | |
2691 | all_vectors = vector->next; | |
2692 | next = vector->next; | |
9ac0d9e0 | 2693 | xfree (vector); |
7146af97 JB |
2694 | vector = next; |
2695 | } | |
2696 | else | |
2697 | { | |
2698 | vector->size &= ~ARRAY_MARK_FLAG; | |
fa05e253 RS |
2699 | if (vector->size & PSEUDOVECTOR_FLAG) |
2700 | total_vector_size += (PSEUDOVECTOR_SIZE_MASK & vector->size); | |
2701 | else | |
2702 | total_vector_size += vector->size; | |
7146af97 JB |
2703 | prev = vector, vector = vector->next; |
2704 | } | |
2705 | } | |
2706 | ||
2707 | /* Free all "large strings" not marked with ARRAY_MARK_FLAG. */ | |
2708 | { | |
2709 | register struct string_block *sb = large_string_blocks, *prev = 0, *next; | |
e8720644 | 2710 | struct Lisp_String *s; |
7146af97 JB |
2711 | |
2712 | while (sb) | |
e8720644 JB |
2713 | { |
2714 | s = (struct Lisp_String *) &sb->chars[0]; | |
2715 | if (s->size & ARRAY_MARK_FLAG) | |
2716 | { | |
2717 | ((struct Lisp_String *)(&sb->chars[0]))->size | |
1fb577f7 | 2718 | &= ~ARRAY_MARK_FLAG & ~MARKBIT; |
e8720644 JB |
2719 | UNMARK_BALANCE_INTERVALS (s->intervals); |
2720 | total_string_size += ((struct Lisp_String *)(&sb->chars[0]))->size; | |
2721 | prev = sb, sb = sb->next; | |
2722 | } | |
2723 | else | |
2724 | { | |
2725 | if (prev) | |
2726 | prev->next = sb->next; | |
2727 | else | |
2728 | large_string_blocks = sb->next; | |
2729 | next = sb->next; | |
2730 | xfree (sb); | |
2731 | sb = next; | |
2732 | } | |
2733 | } | |
7146af97 JB |
2734 | } |
2735 | } | |
2736 | \f | |
1a4f1e2c | 2737 | /* Compactify strings, relocate references, and free empty string blocks. */ |
7146af97 JB |
2738 | |
2739 | static void | |
2740 | compact_strings () | |
2741 | { | |
2742 | /* String block of old strings we are scanning. */ | |
2743 | register struct string_block *from_sb; | |
2744 | /* A preceding string block (or maybe the same one) | |
2745 | where we are copying the still-live strings to. */ | |
2746 | register struct string_block *to_sb; | |
2747 | int pos; | |
2748 | int to_pos; | |
2749 | ||
2750 | to_sb = first_string_block; | |
2751 | to_pos = 0; | |
2752 | ||
2753 | /* Scan each existing string block sequentially, string by string. */ | |
2754 | for (from_sb = first_string_block; from_sb; from_sb = from_sb->next) | |
2755 | { | |
2756 | pos = 0; | |
2757 | /* POS is the index of the next string in the block. */ | |
2758 | while (pos < from_sb->pos) | |
2759 | { | |
2760 | register struct Lisp_String *nextstr | |
2761 | = (struct Lisp_String *) &from_sb->chars[pos]; | |
2762 | ||
2763 | register struct Lisp_String *newaddr; | |
42607681 | 2764 | register EMACS_INT size = nextstr->size; |
c0696668 | 2765 | EMACS_INT size_byte = nextstr->size_byte; |
7146af97 JB |
2766 | |
2767 | /* NEXTSTR is the old address of the next string. | |
2768 | Just skip it if it isn't marked. */ | |
155ffe9c | 2769 | if (((EMACS_UINT) size & ~DONT_COPY_FLAG) > STRING_BLOCK_SIZE) |
7146af97 JB |
2770 | { |
2771 | /* It is marked, so its size field is really a chain of refs. | |
2772 | Find the end of the chain, where the actual size lives. */ | |
155ffe9c | 2773 | while (((EMACS_UINT) size & ~DONT_COPY_FLAG) > STRING_BLOCK_SIZE) |
7146af97 | 2774 | { |
155ffe9c RS |
2775 | if (size & DONT_COPY_FLAG) |
2776 | size ^= MARKBIT | DONT_COPY_FLAG; | |
42607681 | 2777 | size = *(EMACS_INT *)size & ~MARKBIT; |
7146af97 JB |
2778 | } |
2779 | ||
c0696668 RS |
2780 | if (size_byte < 0) |
2781 | size_byte = size; | |
2782 | ||
3f25e183 | 2783 | total_string_size += size_byte; |
7146af97 JB |
2784 | |
2785 | /* If it won't fit in TO_SB, close it out, | |
2786 | and move to the next sb. Keep doing so until | |
2787 | TO_SB reaches a large enough, empty enough string block. | |
2788 | We know that TO_SB cannot advance past FROM_SB here | |
2789 | since FROM_SB is large enough to contain this string. | |
2790 | Any string blocks skipped here | |
2791 | will be patched out and freed later. */ | |
3f25e183 | 2792 | while (to_pos + STRING_FULLSIZE (size_byte) |
7146af97 JB |
2793 | > max (to_sb->pos, STRING_BLOCK_SIZE)) |
2794 | { | |
2795 | to_sb->pos = to_pos; | |
2796 | to_sb = to_sb->next; | |
2797 | to_pos = 0; | |
2798 | } | |
2799 | /* Compute new address of this string | |
2800 | and update TO_POS for the space being used. */ | |
2801 | newaddr = (struct Lisp_String *) &to_sb->chars[to_pos]; | |
3f25e183 | 2802 | to_pos += STRING_FULLSIZE (size_byte); |
7146af97 JB |
2803 | |
2804 | /* Copy the string itself to the new place. */ | |
2805 | if (nextstr != newaddr) | |
3f25e183 | 2806 | bcopy (nextstr, newaddr, STRING_FULLSIZE (size_byte)); |
7146af97 JB |
2807 | |
2808 | /* Go through NEXTSTR's chain of references | |
2809 | and make each slot in the chain point to | |
2810 | the new address of this string. */ | |
2811 | size = newaddr->size; | |
155ffe9c | 2812 | while (((EMACS_UINT) size & ~DONT_COPY_FLAG) > STRING_BLOCK_SIZE) |
7146af97 JB |
2813 | { |
2814 | register Lisp_Object *objptr; | |
155ffe9c RS |
2815 | if (size & DONT_COPY_FLAG) |
2816 | size ^= MARKBIT | DONT_COPY_FLAG; | |
7146af97 JB |
2817 | objptr = (Lisp_Object *)size; |
2818 | ||
2819 | size = XFASTINT (*objptr) & ~MARKBIT; | |
2820 | if (XMARKBIT (*objptr)) | |
2821 | { | |
45d12a89 | 2822 | XSETSTRING (*objptr, newaddr); |
7146af97 JB |
2823 | XMARK (*objptr); |
2824 | } | |
2825 | else | |
45d12a89 | 2826 | XSETSTRING (*objptr, newaddr); |
7146af97 JB |
2827 | } |
2828 | /* Store the actual size in the size field. */ | |
2829 | newaddr->size = size; | |
e8720644 | 2830 | |
5f60ed47 | 2831 | #ifdef USE_TEXT_PROPERTIES |
e8720644 JB |
2832 | /* Now that the string has been relocated, rebalance its |
2833 | interval tree, and update the tree's parent pointer. */ | |
2834 | if (! NULL_INTERVAL_P (newaddr->intervals)) | |
2835 | { | |
2836 | UNMARK_BALANCE_INTERVALS (newaddr->intervals); | |
45d12a89 KH |
2837 | XSETSTRING (* (Lisp_Object *) &newaddr->intervals->parent, |
2838 | newaddr); | |
e8720644 | 2839 | } |
5f60ed47 | 2840 | #endif /* USE_TEXT_PROPERTIES */ |
7146af97 | 2841 | } |
c0696668 RS |
2842 | else if (size_byte < 0) |
2843 | size_byte = size; | |
2844 | ||
3f25e183 | 2845 | pos += STRING_FULLSIZE (size_byte); |
7146af97 JB |
2846 | } |
2847 | } | |
2848 | ||
2849 | /* Close out the last string block still used and free any that follow. */ | |
2850 | to_sb->pos = to_pos; | |
2851 | current_string_block = to_sb; | |
2852 | ||
2853 | from_sb = to_sb->next; | |
2854 | to_sb->next = 0; | |
2855 | while (from_sb) | |
2856 | { | |
2857 | to_sb = from_sb->next; | |
9ac0d9e0 | 2858 | xfree (from_sb); |
7146af97 JB |
2859 | from_sb = to_sb; |
2860 | } | |
2861 | ||
2862 | /* Free any empty string blocks further back in the chain. | |
2863 | This loop will never free first_string_block, but it is very | |
2864 | unlikely that that one will become empty, so why bother checking? */ | |
2865 | ||
2866 | from_sb = first_string_block; | |
2867 | while (to_sb = from_sb->next) | |
2868 | { | |
2869 | if (to_sb->pos == 0) | |
2870 | { | |
2871 | if (from_sb->next = to_sb->next) | |
2872 | from_sb->next->prev = from_sb; | |
9ac0d9e0 | 2873 | xfree (to_sb); |
7146af97 JB |
2874 | } |
2875 | else | |
2876 | from_sb = to_sb; | |
2877 | } | |
2878 | } | |
2879 | \f | |
20d24714 JB |
2880 | /* Debugging aids. */ |
2881 | ||
31ce1c91 | 2882 | DEFUN ("memory-limit", Fmemory_limit, Smemory_limit, 0, 0, 0, |
20d24714 JB |
2883 | "Return the address of the last byte Emacs has allocated, divided by 1024.\n\ |
2884 | This may be helpful in debugging Emacs's memory usage.\n\ | |
e41ae81f | 2885 | We divide the value by 1024 to make sure it fits in a Lisp integer.") |
20d24714 JB |
2886 | () |
2887 | { | |
2888 | Lisp_Object end; | |
2889 | ||
45d12a89 | 2890 | XSETINT (end, (EMACS_INT) sbrk (0) / 1024); |
20d24714 JB |
2891 | |
2892 | return end; | |
2893 | } | |
2894 | ||
310ea200 RS |
2895 | DEFUN ("memory-use-counts", Fmemory_use_counts, Smemory_use_counts, 0, 0, 0, |
2896 | "Return a list of counters that measure how much consing there has been.\n\ | |
2897 | Each of these counters increments for a certain kind of object.\n\ | |
2898 | The counters wrap around from the largest positive integer to zero.\n\ | |
2899 | Garbage collection does not decrease them.\n\ | |
2900 | The elements of the value are as follows:\n\ | |
2901 | (CONSES FLOATS VECTOR-CELLS SYMBOLS STRING-CHARS MISCS INTERVALS)\n\ | |
2902 | All are in units of 1 = one object consed\n\ | |
2903 | except for VECTOR-CELLS and STRING-CHARS, which count the total length of\n\ | |
2904 | objects consed.\n\ | |
2905 | MISCS include overlays, markers, and some internal types.\n\ | |
2906 | Frames, windows, buffers, and subprocesses count as vectors\n\ | |
2907 | (but the contents of a buffer's text do not count here).") | |
2908 | () | |
2909 | { | |
2910 | Lisp_Object lisp_cons_cells_consed; | |
2911 | Lisp_Object lisp_floats_consed; | |
2912 | Lisp_Object lisp_vector_cells_consed; | |
2913 | Lisp_Object lisp_symbols_consed; | |
2914 | Lisp_Object lisp_string_chars_consed; | |
2915 | Lisp_Object lisp_misc_objects_consed; | |
2916 | Lisp_Object lisp_intervals_consed; | |
2917 | ||
2918 | XSETINT (lisp_cons_cells_consed, | |
290c8f1e | 2919 | cons_cells_consed & ~(((EMACS_INT) 1) << (VALBITS - 1))); |
310ea200 | 2920 | XSETINT (lisp_floats_consed, |
290c8f1e | 2921 | floats_consed & ~(((EMACS_INT) 1) << (VALBITS - 1))); |
310ea200 | 2922 | XSETINT (lisp_vector_cells_consed, |
290c8f1e | 2923 | vector_cells_consed & ~(((EMACS_INT) 1) << (VALBITS - 1))); |
310ea200 | 2924 | XSETINT (lisp_symbols_consed, |
290c8f1e | 2925 | symbols_consed & ~(((EMACS_INT) 1) << (VALBITS - 1))); |
310ea200 | 2926 | XSETINT (lisp_string_chars_consed, |
290c8f1e | 2927 | string_chars_consed & ~(((EMACS_INT) 1) << (VALBITS - 1))); |
310ea200 | 2928 | XSETINT (lisp_misc_objects_consed, |
290c8f1e | 2929 | misc_objects_consed & ~(((EMACS_INT) 1) << (VALBITS - 1))); |
310ea200 | 2930 | XSETINT (lisp_intervals_consed, |
290c8f1e | 2931 | intervals_consed & ~(((EMACS_INT) 1) << (VALBITS - 1))); |
310ea200 RS |
2932 | |
2933 | return Fcons (lisp_cons_cells_consed, | |
2934 | Fcons (lisp_floats_consed, | |
2935 | Fcons (lisp_vector_cells_consed, | |
2936 | Fcons (lisp_symbols_consed, | |
2937 | Fcons (lisp_string_chars_consed, | |
2938 | Fcons (lisp_misc_objects_consed, | |
2939 | Fcons (lisp_intervals_consed, | |
2940 | Qnil))))))); | |
2941 | } | |
20d24714 | 2942 | \f |
7146af97 JB |
2943 | /* Initialization */ |
2944 | ||
dfcf069d | 2945 | void |
7146af97 JB |
2946 | init_alloc_once () |
2947 | { | |
2948 | /* Used to do Vpurify_flag = Qt here, but Qt isn't set up yet! */ | |
2949 | pureptr = 0; | |
4c0be5f4 JB |
2950 | #ifdef HAVE_SHM |
2951 | pure_size = PURESIZE; | |
2952 | #endif | |
7146af97 JB |
2953 | all_vectors = 0; |
2954 | ignore_warnings = 1; | |
d1658221 RS |
2955 | #ifdef DOUG_LEA_MALLOC |
2956 | mallopt (M_TRIM_THRESHOLD, 128*1024); /* trim threshold */ | |
2957 | mallopt (M_MMAP_THRESHOLD, 64*1024); /* mmap threshold */ | |
2958 | mallopt (M_MMAP_MAX, 64); /* max. number of mmap'ed areas */ | |
2959 | #endif | |
7146af97 JB |
2960 | init_strings (); |
2961 | init_cons (); | |
2962 | init_symbol (); | |
2963 | init_marker (); | |
2964 | #ifdef LISP_FLOAT_TYPE | |
2965 | init_float (); | |
2966 | #endif /* LISP_FLOAT_TYPE */ | |
d5e35230 JA |
2967 | INIT_INTERVALS; |
2968 | ||
276cbe5a RS |
2969 | #ifdef REL_ALLOC |
2970 | malloc_hysteresis = 32; | |
2971 | #else | |
2972 | malloc_hysteresis = 0; | |
2973 | #endif | |
2974 | ||
2975 | spare_memory = (char *) malloc (SPARE_MEMORY); | |
2976 | ||
7146af97 JB |
2977 | ignore_warnings = 0; |
2978 | gcprolist = 0; | |
2979 | staticidx = 0; | |
2980 | consing_since_gc = 0; | |
7d179cea | 2981 | gc_cons_threshold = 100000 * sizeof (Lisp_Object); |
7146af97 JB |
2982 | #ifdef VIRT_ADDR_VARIES |
2983 | malloc_sbrk_unused = 1<<22; /* A large number */ | |
2984 | malloc_sbrk_used = 100000; /* as reasonable as any number */ | |
2985 | #endif /* VIRT_ADDR_VARIES */ | |
2986 | } | |
2987 | ||
dfcf069d | 2988 | void |
7146af97 JB |
2989 | init_alloc () |
2990 | { | |
2991 | gcprolist = 0; | |
2992 | } | |
2993 | ||
2994 | void | |
2995 | syms_of_alloc () | |
2996 | { | |
2997 | DEFVAR_INT ("gc-cons-threshold", &gc_cons_threshold, | |
2998 | "*Number of bytes of consing between garbage collections.\n\ | |
2999 | Garbage collection can happen automatically once this many bytes have been\n\ | |
3000 | allocated since the last garbage collection. All data types count.\n\n\ | |
3001 | Garbage collection happens automatically only when `eval' is called.\n\n\ | |
3002 | By binding this temporarily to a large number, you can effectively\n\ | |
3003 | prevent garbage collection during a part of the program."); | |
3004 | ||
3005 | DEFVAR_INT ("pure-bytes-used", &pureptr, | |
3006 | "Number of bytes of sharable Lisp data allocated so far."); | |
3007 | ||
0819585c RS |
3008 | DEFVAR_INT ("cons-cells-consed", &cons_cells_consed, |
3009 | "Number of cons cells that have been consed so far."); | |
3010 | ||
3011 | DEFVAR_INT ("floats-consed", &floats_consed, | |
3012 | "Number of floats that have been consed so far."); | |
3013 | ||
3014 | DEFVAR_INT ("vector-cells-consed", &vector_cells_consed, | |
3015 | "Number of vector cells that have been consed so far."); | |
3016 | ||
3017 | DEFVAR_INT ("symbols-consed", &symbols_consed, | |
3018 | "Number of symbols that have been consed so far."); | |
3019 | ||
3020 | DEFVAR_INT ("string-chars-consed", &string_chars_consed, | |
3021 | "Number of string characters that have been consed so far."); | |
3022 | ||
3023 | DEFVAR_INT ("misc-objects-consed", &misc_objects_consed, | |
3024 | "Number of miscellaneous objects that have been consed so far."); | |
3025 | ||
3026 | DEFVAR_INT ("intervals-consed", &intervals_consed, | |
3027 | "Number of intervals that have been consed so far."); | |
3028 | ||
7146af97 JB |
3029 | #if 0 |
3030 | DEFVAR_INT ("data-bytes-used", &malloc_sbrk_used, | |
3031 | "Number of bytes of unshared memory allocated in this session."); | |
3032 | ||
3033 | DEFVAR_INT ("data-bytes-free", &malloc_sbrk_unused, | |
3034 | "Number of bytes of unshared memory remaining available in this session."); | |
3035 | #endif | |
3036 | ||
3037 | DEFVAR_LISP ("purify-flag", &Vpurify_flag, | |
3038 | "Non-nil means loading Lisp code in order to dump an executable.\n\ | |
3039 | This means that certain objects should be allocated in shared (pure) space."); | |
3040 | ||
502b9b64 | 3041 | DEFVAR_INT ("undo-limit", &undo_limit, |
7146af97 | 3042 | "Keep no more undo information once it exceeds this size.\n\ |
502b9b64 | 3043 | This limit is applied when garbage collection happens.\n\ |
7146af97 JB |
3044 | The size is counted as the number of bytes occupied,\n\ |
3045 | which includes both saved text and other data."); | |
502b9b64 | 3046 | undo_limit = 20000; |
7146af97 | 3047 | |
502b9b64 | 3048 | DEFVAR_INT ("undo-strong-limit", &undo_strong_limit, |
7146af97 JB |
3049 | "Don't keep more than this much size of undo information.\n\ |
3050 | A command which pushes past this size is itself forgotten.\n\ | |
502b9b64 | 3051 | This limit is applied when garbage collection happens.\n\ |
7146af97 JB |
3052 | The size is counted as the number of bytes occupied,\n\ |
3053 | which includes both saved text and other data."); | |
502b9b64 | 3054 | undo_strong_limit = 30000; |
7146af97 | 3055 | |
299585ee RS |
3056 | DEFVAR_BOOL ("garbage-collection-messages", &garbage_collection_messages, |
3057 | "Non-nil means display messages at start and end of garbage collection."); | |
3058 | garbage_collection_messages = 0; | |
3059 | ||
bcb61d60 KH |
3060 | /* We build this in advance because if we wait until we need it, we might |
3061 | not be able to allocate the memory to hold it. */ | |
cf3540e4 | 3062 | memory_signal_data |
276cbe5a | 3063 | = Fcons (Qerror, Fcons (build_string ("Memory exhausted--use M-x save-some-buffers RET"), Qnil)); |
bcb61d60 KH |
3064 | staticpro (&memory_signal_data); |
3065 | ||
e8197642 RS |
3066 | staticpro (&Qgc_cons_threshold); |
3067 | Qgc_cons_threshold = intern ("gc-cons-threshold"); | |
3068 | ||
a59de17b RS |
3069 | staticpro (&Qchar_table_extra_slots); |
3070 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
3071 | ||
7146af97 JB |
3072 | defsubr (&Scons); |
3073 | defsubr (&Slist); | |
3074 | defsubr (&Svector); | |
3075 | defsubr (&Smake_byte_code); | |
3076 | defsubr (&Smake_list); | |
3077 | defsubr (&Smake_vector); | |
7b07587b | 3078 | defsubr (&Smake_char_table); |
7146af97 | 3079 | defsubr (&Smake_string); |
7b07587b | 3080 | defsubr (&Smake_bool_vector); |
7146af97 JB |
3081 | defsubr (&Smake_symbol); |
3082 | defsubr (&Smake_marker); | |
3083 | defsubr (&Spurecopy); | |
3084 | defsubr (&Sgarbage_collect); | |
20d24714 | 3085 | defsubr (&Smemory_limit); |
310ea200 | 3086 | defsubr (&Smemory_use_counts); |
7146af97 | 3087 | } |