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0f2d19dd JB |
1 | /* classes: h_files */ |
2 | ||
3 | #ifndef __SCMH | |
4 | #define __SCMH | |
cd911565 | 5 | /* Copyright (C) 1995, 1996, 1998, 1999, 2000 Free Software Foundation, Inc. |
0f2d19dd JB |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2, or (at your option) | |
10 | * any later version. | |
11 | * | |
12 | * This program 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 this software; see the file COPYING. If not, write to | |
82892bed JB |
19 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
20 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
21 | * |
22 | * As a special exception, the Free Software Foundation gives permission | |
23 | * for additional uses of the text contained in its release of GUILE. | |
24 | * | |
25 | * The exception is that, if you link the GUILE library with other files | |
26 | * to produce an executable, this does not by itself cause the | |
27 | * resulting executable to be covered by the GNU General Public License. | |
28 | * Your use of that executable is in no way restricted on account of | |
29 | * linking the GUILE library code into it. | |
30 | * | |
31 | * This exception does not however invalidate any other reasons why | |
32 | * the executable file might be covered by the GNU General Public License. | |
33 | * | |
34 | * This exception applies only to the code released by the | |
35 | * Free Software Foundation under the name GUILE. If you copy | |
36 | * code from other Free Software Foundation releases into a copy of | |
37 | * GUILE, as the General Public License permits, the exception does | |
38 | * not apply to the code that you add in this way. To avoid misleading | |
39 | * anyone as to the status of such modified files, you must delete | |
40 | * this exception notice from them. | |
41 | * | |
42 | * If you write modifications of your own for GUILE, it is your choice | |
43 | * whether to permit this exception to apply to your modifications. | |
82892bed | 44 | * If you do not wish that, delete this exception notice. */ |
0f2d19dd | 45 | \f |
176067df JB |
46 | |
47 | /* "What's the difference between _scm.h and __scm.h?" | |
48 | ||
49 | _scm.h is not installed; it's only visible to the libguile sources | |
50 | themselves. | |
51 | ||
52 | __scm.h is installed, and is #included by <libguile.h>. If both | |
53 | the client and libguile need some piece of information, and it | |
54 | doesn't fit well into the header file for any particular module, it | |
55 | should go in __scm.h. */ | |
56 | ||
57 | ||
0f2d19dd JB |
58 | /* {Supported Options} |
59 | * | |
60 | * These may be defined or undefined. | |
61 | */ | |
62 | ||
83c4c29d | 63 | /* New scheme for garbage collection */ |
d2f51eaf | 64 | #define GUILE_NEW_GC_SCHEME |
83c4c29d | 65 | |
16d35552 | 66 | /* #define GUILE_DEBUG_FREELIST */ |
70d63753 | 67 | |
cf7c17e9 | 68 | /* If the compile FLAG `SCM_CAUTIOUS' is #defined then the number of |
0f2d19dd | 69 | * arguments is always checked for application of closures. If the |
cf7c17e9 | 70 | * compile FLAG `SCM_RECKLESS' is #defined then they are not checked. |
0f2d19dd JB |
71 | * Otherwise, number of argument checks for closures are made only when |
72 | * the function position (whose value is the closure) of a combination is | |
73 | * not an ILOC or GLOC. When the function position of a combination is a | |
74 | * symbol it will be checked only the first time it is evaluated because | |
75 | * it will then be replaced with an ILOC or GLOC. | |
76 | */ | |
cf7c17e9 JB |
77 | #undef SCM_RECKLESS |
78 | #define SCM_CAUTIOUS | |
0f2d19dd JB |
79 | |
80 | /* After looking up a local for the first time, rewrite the | |
81 | * code graph, caching its position. | |
82 | */ | |
83 | #define MEMOIZE_LOCALS | |
84 | ||
85 | /* All the number support there is. | |
86 | */ | |
0f2d19dd JB |
87 | #define BIGNUMS |
88 | ||
89 | /* GC should relinquish empty cons-pair arenas. | |
90 | */ | |
d2f51eaf | 91 | #ifndef GUILE_NEW_GC_SCHEME |
0f2d19dd | 92 | #define GC_FREE_SEGMENTS |
d2f51eaf | 93 | #endif |
0f2d19dd JB |
94 | |
95 | /* Provide a scheme-accessible count-down timer that | |
96 | * generates a pseudo-interrupt. | |
97 | */ | |
98 | #define TICKS | |
99 | ||
100 | ||
101 | /* Use engineering notation when converting numbers strings? | |
102 | */ | |
103 | #undef ENGNOT | |
104 | ||
0f2d19dd JB |
105 | #undef SCM_CAREFUL_INTS |
106 | \f | |
107 | /* {Unsupported Options} | |
108 | * | |
3c205827 | 109 | * These must be defined as given here. |
0f2d19dd JB |
110 | */ |
111 | ||
112 | ||
113 | #define CCLO | |
3c205827 JB |
114 | |
115 | /* Guile Scheme supports the #f/() distinction; Guile Lisp won't. We | |
116 | have horrible plans for their unification. */ | |
117 | #undef SICP | |
0f2d19dd JB |
118 | |
119 | \f | |
120 | ||
80c78696 | 121 | /* Random options (not yet supported or in final form). */ |
0f2d19dd | 122 | |
80c78696 MD |
123 | #define STACK_CHECKING |
124 | #undef NO_CEVAL_STACK_CHECKING | |
0f2d19dd | 125 | |
43ff3170 GH |
126 | \f |
127 | /* What did the configure script discover about the outside world? */ | |
128 | #include "libguile/scmconfig.h" | |
129 | ||
130 | #ifdef HAVE_LONG_LONGS | |
131 | ||
0f2d19dd JB |
132 | /* Some auto-generated .h files contain unused prototypes |
133 | * that need these typedefs. | |
134 | */ | |
afe5177e GH |
135 | typedef long long long_long; |
136 | typedef unsigned long long ulong_long; | |
0f2d19dd | 137 | |
43ff3170 | 138 | #endif /* HAVE_LONG_LONGS */ |
b971d089 JB |
139 | |
140 | \f | |
0f2d19dd JB |
141 | |
142 | /* Define | |
143 | * | |
e2806c10 | 144 | * SCM_CHAR_CODE_LIMIT == UCHAR_MAX + 1 |
0f2d19dd JB |
145 | * SCM_MOST_POSITIVE_FIXNUM (LONG_MAX>>2) |
146 | * SCM_MOST_NEGATIVE_FIXNUM == SCM_SRS((long)LONG_MIN, 2) | |
147 | */ | |
148 | ||
b971d089 | 149 | #ifdef HAVE_LIMITS_H |
0f2d19dd JB |
150 | # include <limits.h> |
151 | # ifdef UCHAR_MAX | |
e2806c10 | 152 | # define SCM_CHAR_CODE_LIMIT (UCHAR_MAX+1L) |
0f2d19dd | 153 | # else |
e2806c10 | 154 | # define SCM_CHAR_CODE_LIMIT 256L |
0f2d19dd JB |
155 | # endif /* def UCHAR_MAX */ |
156 | # define SCM_MOST_POSITIVE_FIXNUM (LONG_MAX>>2) | |
157 | # ifdef _UNICOS /* Stupid cray bug */ | |
158 | # define SCM_MOST_NEGATIVE_FIXNUM ((long)LONG_MIN/4) | |
159 | # else | |
160 | # define SCM_MOST_NEGATIVE_FIXNUM SCM_SRS((long)LONG_MIN, 2) | |
161 | # endif /* UNICOS */ | |
162 | #else | |
e2806c10 | 163 | # define SCM_CHAR_CODE_LIMIT 256L |
0f2d19dd JB |
164 | # define SCM_MOST_POSITIVE_FIXNUM ((long)((unsigned long)~0L>>3)) |
165 | # if (0 != ~0) | |
166 | # define SCM_MOST_NEGATIVE_FIXNUM (-SCM_MOST_POSITIVE_FIXNUM-1) | |
167 | # else | |
168 | # define SCM_MOST_NEGATIVE_FIXNUM (-SCM_MOST_POSITIVE_FIXNUM) | |
169 | # endif /* (0 != ~0) */ | |
b971d089 | 170 | #endif /* def HAVE_LIMITS_H */ |
0f2d19dd JB |
171 | \f |
172 | ||
2a1d8241 JB |
173 | #ifdef STDC_HEADERS |
174 | # include <stdlib.h> | |
175 | # ifdef AMIGA | |
176 | # include <stddef.h> | |
177 | # endif /* def AMIGA */ | |
178 | # define scm_sizet size_t | |
179 | #else | |
180 | # ifdef _SIZE_T | |
181 | # define scm_sizet size_t | |
182 | # else | |
183 | # define scm_sizet unsigned int | |
184 | # endif /* def _SIZE_T */ | |
185 | #endif /* def STDC_HEADERS */ | |
186 | ||
187 | \f | |
188 | ||
189 | #include "libguile/tags.h" | |
0f2d19dd JB |
190 | |
191 | \f | |
192 | #ifdef vms | |
193 | # ifndef CHEAP_CONTINUATIONS | |
194 | typedef int jmp_buf[17]; | |
195 | extern int setjump(jmp_buf env); | |
196 | extern int longjump(jmp_buf env, int ret); | |
197 | # define setjmp setjump | |
198 | # define longjmp longjump | |
199 | # else | |
200 | # include <setjmp.h> | |
201 | # endif | |
202 | #else /* ndef vms */ | |
203 | # ifdef _CRAY1 | |
204 | typedef int jmp_buf[112]; | |
205 | extern int setjump(jmp_buf env); | |
206 | extern int longjump(jmp_buf env, int ret); | |
207 | # define setjmp setjump | |
208 | # define longjmp longjump | |
209 | # else /* ndef _CRAY1 */ | |
210 | # include <setjmp.h> | |
211 | # endif /* ndef _CRAY1 */ | |
212 | #endif /* ndef vms */ | |
213 | ||
0f2d19dd JB |
214 | /* James Clark came up with this neat one instruction fix for |
215 | * continuations on the SPARC. It flushes the register windows so | |
216 | * that all the state of the process is contained in the stack. | |
217 | */ | |
218 | ||
219 | #ifdef sparc | |
220 | # define SCM_FLUSH_REGISTER_WINDOWS asm("ta 3") | |
221 | #else | |
222 | # define SCM_FLUSH_REGISTER_WINDOWS /* empty */ | |
223 | #endif | |
224 | ||
225 | /* If stack is not longword aligned then | |
226 | */ | |
227 | ||
228 | /* #define SHORT_ALIGN */ | |
229 | #ifdef THINK_C | |
230 | # define SHORT_ALIGN | |
231 | #endif | |
232 | #ifdef MSDOS | |
233 | # define SHORT_ALIGN | |
234 | #endif | |
235 | #ifdef atarist | |
236 | # define SHORT_ALIGN | |
237 | #endif | |
238 | ||
239 | #ifdef SHORT_ALIGN | |
240 | typedef short SCM_STACKITEM; | |
241 | #else | |
242 | typedef long SCM_STACKITEM; | |
243 | #endif | |
244 | \f | |
245 | ||
82339094 | 246 | #ifndef USE_THREADS |
25d3ee9d MD |
247 | #define SCM_THREAD_DEFER |
248 | #define SCM_THREAD_ALLOW | |
249 | #define SCM_THREAD_REDEFER | |
25d3ee9d | 250 | #define SCM_THREAD_SWITCHING_CODE |
82339094 MD |
251 | #endif |
252 | ||
0f2d19dd | 253 | extern unsigned int scm_async_clock; |
82339094 | 254 | |
25d3ee9d | 255 | #define SCM_ASYNC_TICK \ |
bfc69694 | 256 | do { \ |
25d3ee9d MD |
257 | if (0 == --scm_async_clock) \ |
258 | scm_async_click (); \ | |
bfc69694 | 259 | } while(0) |
25d3ee9d | 260 | |
0f2d19dd JB |
261 | #ifdef SCM_CAREFUL_INTS |
262 | #define SCM_CHECK_NOT_DISABLED \ | |
263 | if (scm_ints_disabled) \ | |
264 | fputs("ints already disabled\n", stderr); \ | |
265 | ||
266 | #define SCM_CHECK_NOT_ENABLED \ | |
267 | if (!scm_ints_disabled) \ | |
268 | fputs("ints already enabled\n", stderr); \ | |
269 | ||
270 | #else | |
271 | #define SCM_CHECK_NOT_DISABLED | |
272 | #define SCM_CHECK_NOT_ENABLED | |
273 | #endif | |
274 | ||
275 | ||
8417b665 JB |
276 | /* Anthony Green writes: |
277 | When the compiler sees... | |
278 | DEFER_INTS; | |
279 | [critical code here] | |
280 | ALLOW_INTS; | |
281 | ...it doesn't actually promise to keep the critical code within the | |
282 | boundries of the DEFER/ALLOW_INTS instructions. It may very well | |
283 | schedule it outside of the magic defined in those macros. | |
284 | ||
285 | However, GCC's volatile asm feature forms a barrier over which code is | |
286 | never moved. So if you add... | |
35eec738 JB |
287 | asm (""); |
288 | ...to each of the DEFER_INTS and ALLOW_INTS macros, the critical | |
289 | code will always remain in place. asm's without inputs or outputs | |
290 | are implicitly volatile. */ | |
8417b665 | 291 | #ifdef __GNUC__ |
35eec738 | 292 | #define SCM_FENCE asm /* volatile */ ("") |
8417b665 JB |
293 | #else |
294 | #define SCM_FENCE | |
295 | #endif | |
296 | ||
0f2d19dd | 297 | #define SCM_DEFER_INTS \ |
bfc69694 | 298 | do { \ |
8417b665 | 299 | SCM_FENCE; \ |
0f2d19dd | 300 | SCM_CHECK_NOT_DISABLED; \ |
25d3ee9d | 301 | SCM_THREAD_DEFER; \ |
8417b665 | 302 | SCM_FENCE; \ |
0f2d19dd | 303 | scm_ints_disabled = 1; \ |
8417b665 | 304 | SCM_FENCE; \ |
bfc69694 | 305 | } while (0) |
0f2d19dd JB |
306 | |
307 | ||
308 | #define SCM_ALLOW_INTS_ONLY \ | |
bfc69694 | 309 | do { \ |
25d3ee9d | 310 | SCM_THREAD_ALLOW; \ |
0f2d19dd | 311 | scm_ints_disabled = 0; \ |
bfc69694 | 312 | } while (0) |
0f2d19dd JB |
313 | |
314 | ||
315 | #define SCM_ALLOW_INTS \ | |
bfc69694 | 316 | do { \ |
8417b665 | 317 | SCM_FENCE; \ |
0f2d19dd | 318 | SCM_CHECK_NOT_ENABLED; \ |
c72cc5fb MD |
319 | SCM_THREAD_SWITCHING_CODE; \ |
320 | SCM_FENCE; \ | |
0f2d19dd | 321 | scm_ints_disabled = 0; \ |
8417b665 JB |
322 | SCM_FENCE; \ |
323 | SCM_THREAD_ALLOW; \ | |
8417b665 | 324 | SCM_FENCE; \ |
bfc69694 | 325 | } while (0) |
0f2d19dd JB |
326 | |
327 | ||
328 | #define SCM_REDEFER_INTS \ | |
bfc69694 | 329 | do { \ |
c72cc5fb | 330 | SCM_FENCE; \ |
25d3ee9d | 331 | SCM_THREAD_REDEFER; \ |
0f2d19dd | 332 | ++scm_ints_disabled; \ |
c72cc5fb | 333 | SCM_FENCE; \ |
bfc69694 | 334 | } while (0) |
0f2d19dd JB |
335 | |
336 | ||
337 | #define SCM_REALLOW_INTS \ | |
bfc69694 | 338 | do { \ |
c72cc5fb | 339 | SCM_FENCE; \ |
c72cc5fb MD |
340 | SCM_THREAD_SWITCHING_CODE; \ |
341 | SCM_FENCE; \ | |
0f2d19dd | 342 | --scm_ints_disabled; \ |
c72cc5fb | 343 | SCM_FENCE; \ |
bfc69694 | 344 | } while (0) |
0f2d19dd JB |
345 | |
346 | ||
c72cc5fb | 347 | #define SCM_TICK \ |
bfc69694 | 348 | do { \ |
c72cc5fb MD |
349 | SCM_DEFER_INTS; \ |
350 | SCM_ALLOW_INTS; \ | |
cd911565 | 351 | SCM_ASYNC_TICK; \ |
bfc69694 | 352 | } while (0) |
0f2d19dd JB |
353 | |
354 | \f | |
355 | ||
f83e2737 MD |
356 | /* Classification of critical sections |
357 | * | |
358 | * When Guile moves to POSIX threads, it won't be possible to prevent | |
359 | * context switching. In fact, the whole idea of context switching is | |
360 | * bogus if threads are run by different processors. Therefore, we | |
361 | * must ultimately eliminate all critical sections or enforce them by | |
362 | * use of mutecis. | |
363 | * | |
364 | * All instances of SCM_DEFER_INTS and SCM_ALLOW_INTS should therefore | |
365 | * be classified and replaced by one of the delimiters below. If you | |
366 | * understand what this is all about, I'd like to encourage you to | |
367 | * help with this task. The set of classes below must of course be | |
368 | * incrementally augmented. | |
369 | * | |
370 | * MDJ 980419 <djurfeldt@nada.kth.se> | |
371 | */ | |
372 | ||
373 | /* A sections | |
374 | * | |
375 | * Allocation of a cell with type tag in the CAR. | |
376 | * | |
377 | * With POSIX threads, each thread will have a private pool of free | |
378 | * cells. Therefore, this type of section can be removed. But! It | |
379 | * is important that the CDR is initialized first (with the CAR still | |
380 | * indicating a free cell) so that we can guarantee a consistent heap | |
381 | * at all times. | |
382 | */ | |
383 | ||
384 | #ifdef SCM_POSIX_THREADS | |
385 | #define SCM_ENTER_A_SECTION | |
386 | #define SCM_EXIT_A_SECTION | |
387 | #else | |
388 | #define SCM_ENTER_A_SECTION SCM_DEFER_INTS | |
389 | #define SCM_EXIT_A_SECTION SCM_ALLOW_INTS | |
390 | #endif | |
391 | ||
392 | \f | |
393 | ||
0f2d19dd JB |
394 | /** SCM_ASSERT |
395 | ** | |
396 | **/ | |
397 | ||
398 | ||
399 | #ifdef SCM_RECKLESS | |
400 | #define SCM_ASSERT(_cond, _arg, _pos, _subr) | |
b6791b2e | 401 | #define SCM_ASSERT_TYPE(_cond, _arg, _pos, _subr) |
0f2d19dd JB |
402 | #define SCM_ASRTGO(_cond, _label) |
403 | #else | |
404 | #define SCM_ASSERT(_cond, _arg, _pos, _subr) \ | |
405 | if (!(_cond)) \ | |
406 | scm_wta(_arg, (char *)(_pos), _subr) | |
b6791b2e GB |
407 | #define SCM_ASSERT_TYPE(_cond, _arg, _pos, _subr, _msg) \ |
408 | if (!(_cond)) \ | |
409 | scm_wrong_type_arg_msg(_subr, _pos, _arg, _msg) | |
0f2d19dd JB |
410 | #define SCM_ASRTGO(_cond, _label) \ |
411 | if (!(_cond)) \ | |
412 | goto _label | |
413 | #endif | |
95b88819 | 414 | |
9de33deb MD |
415 | /* |
416 | * SCM_WTA_DISPATCH | |
417 | */ | |
418 | ||
b3c8a0f5 MD |
419 | extern SCM scm_call_generic_0 (SCM gf); |
420 | ||
421 | #define SCM_WTA_DISPATCH_0(gf, arg, pos, subr) \ | |
422 | return ((gf) \ | |
423 | ? scm_call_generic_0 ((gf)) \ | |
424 | : scm_wta ((arg), (char *) (pos), (subr))) | |
425 | #define SCM_GASSERT0(cond, gf, arg, pos, subr) \ | |
ff725a17 | 426 | if (!(cond)) SCM_WTA_DISPATCH_0((gf), (arg), (pos), (subr)) |
b3c8a0f5 | 427 | |
9de33deb MD |
428 | extern SCM scm_call_generic_1 (SCM gf, SCM a1); |
429 | ||
430 | #define SCM_WTA_DISPATCH_1(gf, a1, pos, subr) \ | |
431 | return ((gf) \ | |
432 | ? scm_call_generic_1 ((gf), (a1)) \ | |
433 | : scm_wta ((a1), (char *) (pos), (subr))) | |
434 | #define SCM_GASSERT1(cond, gf, a1, pos, subr) \ | |
435 | if (!(cond)) SCM_WTA_DISPATCH_1((gf), (a1), (pos), (subr)) | |
436 | ||
437 | extern SCM scm_call_generic_2 (SCM gf, SCM a1, SCM a2); | |
438 | ||
439 | #define SCM_WTA_DISPATCH_2(gf, a1, a2, pos, subr) \ | |
440 | return ((gf) \ | |
441 | ? scm_call_generic_2 ((gf), (a1), (a2)) \ | |
442 | : scm_wta ((pos) == SCM_ARG1 ? (a1) : (a2), (char *) (pos), (subr))) | |
443 | #define SCM_GASSERT2(cond, gf, a1, a2, pos, subr) \ | |
444 | if (!(cond)) SCM_WTA_DISPATCH_2((gf), (a1), (a2), (pos), (subr)) | |
445 | ||
89c358b1 MD |
446 | extern SCM scm_apply_generic (SCM gf, SCM args); |
447 | ||
448 | #define SCM_WTA_DISPATCH_n(gf, args, pos, subr) \ | |
449 | return ((gf) \ | |
450 | ? scm_apply_generic ((gf), (args)) \ | |
451 | : scm_wta (scm_list_ref ((args), SCM_MAKINUM ((pos) - 1)), \ | |
452 | (char *) (pos), \ | |
453 | (subr))) | |
454 | #define SCM_GASSERTn(cond, gf, args, pos, subr) \ | |
455 | if (!(cond)) SCM_WTA_DISPATCH_n((gf), (args), (pos), (subr)) | |
456 | ||
c751e5e3 GB |
457 | #ifndef SCM_MAGIC_SNARFER |
458 | /* Let these macros pass through if | |
459 | we are snarfing; thus we can tell the | |
460 | difference between the use of an actual | |
461 | number vs. the use of one of these macros -- | |
f5421cfc | 462 | actual numbers in SCM_VALIDATE_* and SCM_ASSERT |
c751e5e3 GB |
463 | constructs must match the formal argument name, |
464 | but using SCM_ARG* avoids the test */ | |
465 | ||
0f2d19dd JB |
466 | #define SCM_ARGn 0 |
467 | #define SCM_ARG1 1 | |
468 | #define SCM_ARG2 2 | |
469 | #define SCM_ARG3 3 | |
470 | #define SCM_ARG4 4 | |
471 | #define SCM_ARG5 5 | |
1146b6cd GH |
472 | #define SCM_ARG6 6 |
473 | #define SCM_ARG7 7 | |
f5bf2977 | 474 | /* #define SCM_ARGERR(X) ((X) < SCM_WNA \ |
0f2d19dd JB |
475 | ? (char *)(X) \ |
476 | : "wrong type argument") | |
f5bf2977 | 477 | */ |
0f2d19dd JB |
478 | |
479 | /* Following must match entry indexes in scm_errmsgs[]. | |
480 | * Also, SCM_WNA must follow the last SCM_ARGn in sequence. | |
481 | */ | |
482 | #define SCM_WNA 8 | |
e1724d20 | 483 | /* #define SCM_OVSCM_FLOW 9 */ |
0f2d19dd JB |
484 | #define SCM_OUTOFRANGE 10 |
485 | #define SCM_NALLOC 11 | |
f5bf2977 GH |
486 | /* #define SCM_STACK_OVFLOW 12 */ |
487 | /* #define SCM_EXIT 13 */ | |
0f2d19dd | 488 | |
c751e5e3 | 489 | #endif /* SCM_MAGIC_SNARFER */ |
0f2d19dd JB |
490 | |
491 | /* (...still matching scm_errmsgs) These | |
492 | * are signals. Signals may become errors | |
493 | * but are distinguished because they first | |
494 | * try to invoke a handler that can resume | |
495 | * the interrupted routine. | |
496 | */ | |
497 | #define SCM_HUP_SIGNAL 14 | |
498 | #define SCM_INT_SIGNAL 15 | |
499 | #define SCM_FPE_SIGNAL 16 | |
500 | #define SCM_BUS_SIGNAL 17 | |
501 | #define SCM_SEGV_SIGNAL 18 | |
502 | #define SCM_ALRM_SIGNAL 19 | |
503 | #define SCM_GC_SIGNAL 20 | |
504 | #define SCM_TICK_SIGNAL 21 | |
505 | ||
506 | #define SCM_SIG_ORD(X) ((X) - SCM_HUP_SIGNAL) | |
507 | #define SCM_ORD_SIG(X) ((X) + SCM_HUP_SIGNAL) | |
508 | #define SCM_NUM_SIGS (SCM_SIG_ORD (SCM_TICK_SIGNAL) + 1) | |
509 | ||
82339094 | 510 | #if 0 |
0f2d19dd JB |
511 | struct errdesc |
512 | { | |
513 | char *msg; | |
514 | char *s_response; | |
515 | short parent_err; | |
516 | }; | |
517 | ||
518 | ||
519 | extern struct errdesc scm_errmsgs[]; | |
82339094 | 520 | #endif |
0f2d19dd JB |
521 | |
522 | \f | |
523 | ||
524 | /* SCM_EXIT_SUCCESS is the default code to return from SCM if no errors | |
525 | * were encountered. SCM_EXIT_FAILURE is the default code to return from | |
526 | * SCM if errors were encountered. The return code can be explicitly | |
527 | * specified in a SCM program with (scm_quit <n>). | |
528 | */ | |
529 | ||
530 | #ifndef SCM_EXIT_SUCCESS | |
531 | #ifdef vms | |
532 | #define SCM_EXIT_SUCCESS 1 | |
533 | #else | |
534 | #define SCM_EXIT_SUCCESS 0 | |
535 | #endif /* def vms */ | |
536 | #endif /* ndef SCM_EXIT_SUCCESS */ | |
537 | #ifndef SCM_EXIT_FAILURE | |
538 | #ifdef vms | |
539 | #define SCM_EXIT_FAILURE 2 | |
540 | #else | |
541 | #define SCM_EXIT_FAILURE 1 | |
542 | #endif /* def vms */ | |
543 | #endif /* ndef SCM_EXIT_FAILURE */ | |
544 | ||
545 | ||
546 | ||
547 | \f | |
0f2d19dd JB |
548 | |
549 | #endif /* __SCMH */ | |
89e00824 ML |
550 | |
551 | /* | |
552 | Local Variables: | |
553 | c-file-style: "gnu" | |
554 | End: | |
555 | */ |