libguile/__scm.h

   1 /* classes: h_files */
   2
   3 #ifndef SCM___SCM_H
   4 #define SCM___SCM_H
   5 /* Copyright (C) 1995,1996,1998,1999,2000,2001 Free Software Foundation, Inc.
   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
  19  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  20  * Boston, MA 02111-1307 USA
  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.
  44  * If you do not wish that, delete this exception notice.  */
  45 \f
  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
  58 /* {Compiler hints}
  59  *
  60  * The following macros are used to provide additional information for the
  61  * compiler, which may help to do better error checking and code
  62  * optimization.  A second benefit of these macros is, that they also provide
  63  * additional information to the developers.
  64  */
  65
  66 /* The macro SCM_NORETURN indicates that a function will never return.
  67  * Examples:
  68  *   1) int foo (char arg) SCM_NORETURN;
  69  */
  70 #ifdef __GNUC__
  71 #define SCM_NORETURN __attribute__ ((noreturn))
  72 #else
  73 #define SCM_NORETURN
  74 #endif
  75
  76 /* The macro SCM_UNUSED indicates that a function, function argument or
  77  * variable may potentially be unused.
  78  * Examples:
  79  *   1) static int unused_function (char arg) SCM_UNUSED;
  80  *   2) int foo (char unused_argument SCM_UNUSED);
  81  *   3) int unused_variable SCM_UNUSED;
  82  */
  83 #ifdef __GNUC__
  84 #define SCM_UNUSED __attribute__ ((unused))
  85 #else
  86 #define SCM_UNUSED
  87 #endif
  88
  89
  90 /* {Supported Options}
  91  *
  92  * These may be defined or undefined.
  93  */
  94
  95 /* Old async mechanism */
  96 /* #define GUILE_OLD_ASYNC_CLICK */
  97
  98 /* #define GUILE_DEBUG_FREELIST */
  99
 100 /* If the compile FLAG `SCM_CAUTIOUS' is #defined then the number of
 101  * arguments is always checked for application of closures.  If the
 102  * compile FLAG `SCM_RECKLESS' is #defined then they are not checked.
 103  * Otherwise, number of argument checks for closures are made only when
 104  * the function position (whose value is the closure) of a combination is
 105  * not an ILOC or GLOC.  When the function position of a combination is a
 106  * symbol it will be checked only the first time it is evaluated because
 107  * it will then be replaced with an ILOC or GLOC.
 108  */
 109 #undef SCM_RECKLESS
 110 #define SCM_CAUTIOUS
 111
 112 /* After looking up a local for the first time, rewrite the
 113  * code graph, caching its position.
 114  */
 115 #define MEMOIZE_LOCALS
 116
 117 /* All the number support there is.
 118  */
 119 #define BIGNUMS
 120
 121 /* GC should relinquish empty cons-pair arenas. */
 122 /* cmm:FIXME look at this after done mangling the GC */
 123 /* #define GC_FREE_SEGMENTS */
 124
 125 /* Provide a scheme-accessible count-down timer that
 126  * generates a pseudo-interrupt.
 127  */
 128 #define TICKS
 129
 130
 131 /* Use engineering notation when converting numbers strings?
 132  */
 133 #undef ENGNOT
 134
 135 \f
 136 /* {Unsupported Options}
 137  *
 138  * These must be defined as given here.
 139  */
 140
 141
 142 #define CCLO
 143
 144 /* Guile Scheme supports the #f/() distinction; Guile Lisp won't.  We
 145    have horrible plans for their unification.  */
 146 #undef SICP
 147
 148 \f
 149
 150 /* Random options (not yet supported or in final form). */
 151
 152 #define STACK_CHECKING
 153 #undef NO_CEVAL_STACK_CHECKING
 154
 155 \f
 156
 157 /* What did the configure script discover about the outside world?  */
 158 #include "libguile/scmconfig.h"
 159
 160 \f
 161
 162 /* {Debugging Options}
 163  *
 164  * These compile time options determine whether to include code that is only
 165  * useful for debugging guile itself or C level extensions to guile.  The
 166  * common prefix for all option macros of this kind is "SCM_DEBUG_".  It is
 167  * guaranteed that a macro named SCM_DEBUG_XXX is defined to be either 0 or 1,
 168  * i. e. there is no need to test for the undefined case.  This allows to use
 169  * these definitions comfortably in macro code, as in the following example:
 170  *   #define FOO do { if (SCM_DEBUG_XXX) bar(); else baz(); } while (0)
 171  * Any sane compiler will remove the unused branch without any performance
 172  * penalty for the resulting code.
 173  *
 174  * Note:  Some SCM_DEBUG_XXX options are not settable at configure time.
 175  * To change the value of such options you will have to edit this header
 176  * file or give suitable options to make, like:
 177  *   make all CFLAGS="-DSCM_DEBUG_XXX=1 ..."
 178  */
 179
 180
 181 /* The value of SCM_DEBUG determines the default for most of the not yet
 182  * defined debugging options.  This allows, for example, to enable most of the
 183  * debugging options by simply defining SCM_DEBUG as 1.
 184  */
 185 #ifndef SCM_DEBUG
 186 #define SCM_DEBUG 0
 187 #endif
 188
 189 /* If SCM_DEBUG_CELL_ACCESSES is set to 1, cell accesses will perform
 190  * exhaustive parameter checking:  It will be verified that cell parameters
 191  * actually point to a valid heap cell.  Note:  If this option is enabled,
 192  * guile will run about ten times slower than normally.
 193  */
 194 #ifndef SCM_DEBUG_CELL_ACCESSES
 195 #define SCM_DEBUG_CELL_ACCESSES SCM_DEBUG
 196 #endif
 197
 198 /* If SCM_DEBUG_DEPRECATED is set to 1, deprecated code is not compiled.  This
 199  * can be used by developers to get rid of references to deprecated code.
 200  */
 201 #ifndef SCM_DEBUG_DEPRECATED
 202 #define SCM_DEBUG_DEPRECATED SCM_DEBUG
 203 #endif
 204
 205 /* If SCM_DEBUG_INTERRUPTS is set to 1, with every deferring and allowing of
 206  * interrupts a consistency check will be performed.
 207  */
 208 #ifndef SCM_DEBUG_INTERRUPTS
 209 #define SCM_DEBUG_INTERRUPTS SCM_DEBUG
 210 #endif
 211
 212 /* If SCM_DEBUG_PAIR_ACCESSES is set to 1, accesses to cons cells will be
 213  * exhaustively checked.  Note:  If this option is enabled, guile will run
 214  * slower than normally.
 215  */
 216 #ifndef SCM_DEBUG_PAIR_ACCESSES
 217 #define SCM_DEBUG_PAIR_ACCESSES SCM_DEBUG
 218 #endif
 219
 220 /* If SCM_DEBUG_REST_ARGUMENT is set to 1, functions that take rest arguments
 221  * will check whether the rest arguments are actually passed as a proper list.
 222  * Otherwise, if SCM_DEBUG_REST_ARGUMENT is 0, functions that take rest
 223  * arguments will take it for granted that these are passed as a proper list.
 224  */
 225 #ifndef SCM_DEBUG_REST_ARGUMENT
 226 #define SCM_DEBUG_REST_ARGUMENT SCM_DEBUG
 227 #endif
 228
 229 /* Use this for _compile time_ type checking only, since the compiled result
 230  * will be quite inefficient.  The right way to make use of this option is to
 231  * do a 'make clean; make CFLAGS=-DSCM_DEBUG_TYPING_STRICTNESS=1', fix your
 232  * errors, and then do 'make clean; make'.
 233  */
 234 #ifndef SCM_DEBUG_TYPING_STRICTNESS
 235 #define SCM_DEBUG_TYPING_STRICTNESS 1
 236 #endif
 237
 238 /* If SCM_ENABLE_VCELLS is set to 1, a couple of functions that deal
 239  * with vcells are defined for compatability reasons.  Supporting
 240  * vcells reduces performance however.
 241  *
 242  * We use a dedicated macro instead of just SCM_DEBUG_DEPRECATED so
 243  * that code the belongs to the `vcell' feature is easier to find.
 244  */
 245 #define SCM_ENABLE_VCELLS !SCM_DEBUG_DEPRECATED
 246
 247 \f
 248
 249 #ifdef HAVE_LONG_LONGS
 250
 251 /* Some auto-generated .h files contain unused prototypes
 252  * that need these typedefs.
 253  */
 254
 255 #if (SCM_DEBUG_DEPRECATED == 0)
 256 typedef long long long_long;
 257 typedef unsigned long long ulong_long;
 258 #endif
 259
 260 #endif /* HAVE_LONG_LONGS */
 261
 262 \f
 263
 264 /* {Architecture and compiler properties}
 265  *
 266  * Guile as of today can only work on systems which fulfill at least the
 267  * following requirements:
 268  * - long ints have at least 32 bits.
 269  *   Guile's type system is based on this assumption.
 270  * - long ints consist of at least four characters.
 271  *   It is assumed that cells, i. e. pairs of long ints, are eight character
 272  *   aligned, because three bits of a cell pointer are used for type data.
 273  * - sizeof (void*) == sizeof (long int)
 274  *   Pointers are stored in SCM objects, and sometimes SCM objects are passed
 275  *   as void*.  Thus, there has to be a one-to-one correspondence.
 276  * - numbers are encoded using two's complement.
 277  *   The implementation of the bitwise scheme level operations is based on
 278  *   this assumption.
 279  * - ... add more
 280  */
 281
 282 #ifdef HAVE_LIMITS_H
 283 # include <limits.h>
 284 #endif
 285
 286 #ifdef CHAR_BIT
 287 # define SCM_CHAR_BIT CHAR_BIT
 288 #else
 289 # define SCM_CHAR_BIT 8
 290 #endif
 291
 292 #ifdef LONG_BIT
 293 # define SCM_LONG_BIT LONG_BIT
 294 #else
 295 # define SCM_LONG_BIT (SCM_CHAR_BIT * sizeof (long) / sizeof (char))
 296 #endif
 297
 298 #ifdef UCHAR_MAX
 299 # define SCM_CHAR_CODE_LIMIT (UCHAR_MAX + 1L)
 300 #else
 301 # define SCM_CHAR_CODE_LIMIT 256L
 302 #endif
 303
 304 \f
 305
 306 #ifdef STDC_HEADERS
 307 # include <stdlib.h>
 308 # if HAVE_SYS_TYPES_H
 309 #  include <sys/types.h>
 310 # endif
 311 # if HAVE_SYS_STDTYPES_H
 312 #  include <sys/stdtypes.h>
 313 # endif
 314 #  include <stddef.h>
 315 #endif /* def STDC_HEADERS */
 316
 317 #if (SCM_DEBUG_DEPRECATED == 0)
 318 # define scm_sizet size_t
 319 #endif
 320
 321 \f
 322
 323 #include "libguile/tags.h"
 324
 325 \f
 326 #ifdef vms
 327 # ifndef CHEAP_CONTINUATIONS
 328    typedef int jmp_buf[17];
 329    extern int setjump(jmp_buf env);
 330    extern int longjump(jmp_buf env, int ret);
 331 #  define setjmp setjump
 332 #  define longjmp longjump
 333 # else
 334 #  include <setjmp.h>
 335 # endif
 336 #else                           /* ndef vms */
 337 # ifdef _CRAY1
 338     typedef int jmp_buf[112];
 339     extern int setjump(jmp_buf env);
 340     extern int longjump(jmp_buf env, int ret);
 341 #  define setjmp setjump
 342 #  define longjmp longjump
 343 # else                          /* ndef _CRAY1 */
 344 #  include <setjmp.h>
 345 # endif                         /* ndef _CRAY1 */
 346 #endif                          /* ndef vms */
 347
 348 /* James Clark came up with this neat one instruction fix for
 349  * continuations on the SPARC.  It flushes the register windows so
 350  * that all the state of the process is contained in the stack.
 351  */
 352
 353 #ifdef sparc
 354 # define SCM_FLUSH_REGISTER_WINDOWS asm("ta 3")
 355 #else
 356 # define SCM_FLUSH_REGISTER_WINDOWS /* empty */
 357 #endif
 358
 359 /* If stack is not longword aligned then
 360  */
 361
 362 /* #define SHORT_ALIGN */
 363 #ifdef THINK_C
 364 # define SHORT_ALIGN
 365 #endif
 366 #ifdef MSDOS
 367 # define SHORT_ALIGN
 368 #endif
 369 #ifdef atarist
 370 # define SHORT_ALIGN
 371 #endif
 372
 373 #ifdef SHORT_ALIGN
 374 typedef short SCM_STACKITEM;
 375 #else
 376 typedef long SCM_STACKITEM;
 377 #endif
 378 \f
 379
 380 #ifndef USE_THREADS
 381 #define SCM_CRITICAL_SECTION_START
 382 #define SCM_CRITICAL_SECTION_END
 383 #define SCM_THREAD_SWITCHING_CODE
 384 #endif
 385
 386 #ifdef GUILE_OLD_ASYNC_CLICK
 387 extern unsigned int scm_async_clock;
 388
 389 #define SCM_ASYNC_TICK \
 390 do { \
 391   if (0 == --scm_async_clock) \
 392     scm_async_click (); \
 393 } while(0)
 394 #else
 395 extern int scm_asyncs_pending_p;
 396
 397 #define SCM_ASYNC_TICK /*fixme* should change names */ \
 398 do { \
 399   if (scm_asyncs_pending_p) \
 400     scm_async_click (); \
 401 } while (0)
 402 #endif
 403
 404 #if (SCM_DEBUG_INTERRUPTS == 1)
 405 #include <stdio.h>
 406 #define SCM_CHECK_NOT_DISABLED \
 407   do { \
 408     if (scm_ints_disabled) \
 409       fprintf(stderr, "ints already disabled (at %s:%d)\n", \
 410               __FILE__, __LINE__); \
 411   } while (0)
 412
 413 #define SCM_CHECK_NOT_ENABLED \
 414   do { \
 415     if (!scm_ints_disabled) \
 416       fprintf(stderr, "ints already enabled (at %s:%d)\n", \
 417               __FILE__, __LINE__); \
 418   } while (0)
 419
 420 #else
 421 #define SCM_CHECK_NOT_DISABLED
 422 #define SCM_CHECK_NOT_ENABLED
 423 #endif
 424
 425
 426 /* Anthony Green writes:
 427    When the compiler sees...
 428            DEFER_INTS;
 429            [critical code here]
 430            ALLOW_INTS;
 431    ...it doesn't actually promise to keep the critical code within the
 432    boundries of the DEFER/ALLOW_INTS instructions. It may very well
 433    schedule it outside of the magic defined in those macros.
 434
 435    However, GCC's volatile asm feature forms a barrier over which code is
 436    never moved. So if you add...
 437            asm ("");
 438    ...to each of the DEFER_INTS and ALLOW_INTS macros, the critical
 439    code will always remain in place.  asm's without inputs or outputs
 440    are implicitly volatile. */
 441 #ifdef __GNUC__
 442 #define SCM_FENCE asm /* volatile */ ("")
 443 #else
 444 #define SCM_FENCE
 445 #endif
 446
 447 #define SCM_DEFER_INTS \
 448 do { \
 449   SCM_FENCE; \
 450   SCM_CHECK_NOT_DISABLED; \
 451   SCM_CRITICAL_SECTION_START; \
 452   SCM_FENCE; \
 453   scm_ints_disabled = 1; \
 454   SCM_FENCE; \
 455 } while (0)
 456
 457
 458 #define SCM_ALLOW_INTS_ONLY \
 459 do { \
 460   SCM_CRITICAL_SECTION_END; \
 461   scm_ints_disabled = 0; \
 462 } while (0)
 463
 464
 465 #define SCM_ALLOW_INTS \
 466 do { \
 467   SCM_FENCE; \
 468   SCM_CHECK_NOT_ENABLED; \
 469   SCM_CRITICAL_SECTION_END; \
 470   SCM_FENCE; \
 471   scm_ints_disabled = 0; \
 472   SCM_FENCE; \
 473   SCM_THREAD_SWITCHING_CODE; \
 474   SCM_FENCE; \
 475 } while (0)
 476
 477
 478 #define SCM_REDEFER_INTS  \
 479 do { \
 480   SCM_FENCE; \
 481   SCM_CRITICAL_SECTION_START; \
 482   ++scm_ints_disabled; \
 483   SCM_FENCE; \
 484 } while (0)
 485
 486
 487 #define SCM_REALLOW_INTS \
 488 do { \
 489   SCM_FENCE; \
 490   SCM_CRITICAL_SECTION_END; \
 491   SCM_FENCE; \
 492   --scm_ints_disabled; \
 493   SCM_FENCE; \
 494 } while (0)
 495
 496
 497 #define SCM_TICK \
 498 do { \
 499   SCM_ASYNC_TICK; \
 500   SCM_THREAD_SWITCHING_CODE; \
 501 } while (0)
 502
 503 \f
 504
 505 /* Classification of critical sections
 506  *
 507  * When Guile moves to POSIX threads, it won't be possible to prevent
 508  * context switching.  In fact, the whole idea of context switching is
 509  * bogus if threads are run by different processors.  Therefore, we
 510  * must ultimately eliminate all critical sections or enforce them by
 511  * use of mutecis.
 512  *
 513  * All instances of SCM_DEFER_INTS and SCM_ALLOW_INTS should therefore
 514  * be classified and replaced by one of the delimiters below.  If you
 515  * understand what this is all about, I'd like to encourage you to
 516  * help with this task.  The set of classes below must of course be
 517  * incrementally augmented.
 518  *
 519  * MDJ 980419 <djurfeldt@nada.kth.se>
 520  */
 521
 522 /* A sections
 523  *
 524  * Allocation of a cell with type tag in the CAR.
 525  *
 526  * With POSIX threads, each thread will have a private pool of free
 527  * cells.  Therefore, this type of section can be removed.  But!  It
 528  * is important that the CDR is initialized first (with the CAR still
 529  * indicating a free cell) so that we can guarantee a consistent heap
 530  * at all times.
 531  */
 532
 533 #define SCM_ENTER_A_SECTION SCM_CRITICAL_SECTION_START
 534 #define SCM_EXIT_A_SECTION SCM_CRITICAL_SECTION_END
 535
 536 \f
 537
 538 /** SCM_ASSERT
 539  **
 540  **/
 541
 542
 543 #ifdef SCM_RECKLESS
 544 #define SCM_ASSERT(_cond, _arg, _pos, _subr)
 545 #define SCM_ASSERT_TYPE(_cond, _arg, _pos, _subr, _msg)
 546 #define SCM_ASRTGO(_cond, _label)
 547 #else
 548 #define SCM_ASSERT(_cond, _arg, _pos, _subr) \
 549         if (!(_cond)) \
 550           scm_wrong_type_arg (_subr, _pos, _arg)
 551 #define SCM_ASSERT_TYPE(_cond, _arg, _pos, _subr, _msg) \
 552         if (!(_cond)) \
 553           scm_wrong_type_arg_msg(_subr, _pos, _arg, _msg)
 554 #define SCM_ASRTGO(_cond, _label) \
 555         if (!(_cond)) \
 556           goto _label
 557 #endif
 558
 559 /*
 560  * SCM_WTA_DISPATCH
 561  */
 562
 563 /* Dirk:FIXME:: In all of the SCM_WTA_DISPATCH_* macros it is assumed that
 564  * 'gf' is zero if uninitialized.  It would be cleaner if some valid SCM value
 565  * like SCM_BOOL_F or SCM_UNDEFINED was chosen.
 566  */
 567
 568 extern SCM scm_call_generic_0 (SCM gf);
 569
 570 #define SCM_WTA_DISPATCH_0(gf, subr)                            \
 571   return (SCM_UNPACK (gf)                                       \
 572           ? scm_call_generic_0 ((gf))                           \
 573           : (scm_error_num_args_subr ((subr)), SCM_UNSPECIFIED))
 574 #define SCM_GASSERT0(cond, gf, subr) \
 575   if (!(cond)) SCM_WTA_DISPATCH_0((gf), (subr))
 576
 577 extern SCM scm_call_generic_1 (SCM gf, SCM a1);
 578
 579 #define SCM_WTA_DISPATCH_1(gf, a1, pos, subr)                   \
 580   return (SCM_UNPACK (gf)                                       \
 581           ? scm_call_generic_1 ((gf), (a1))                     \
 582           : (scm_wrong_type_arg ((subr), (pos), (a1)), SCM_UNSPECIFIED))
 583 #define SCM_GASSERT1(cond, gf, a1, pos, subr) \
 584   if (!(cond)) SCM_WTA_DISPATCH_1((gf), (a1), (pos), (subr))
 585
 586 extern SCM scm_call_generic_2 (SCM gf, SCM a1, SCM a2);
 587
 588 #define SCM_WTA_DISPATCH_2(gf, a1, a2, pos, subr)                       \
 589   return (SCM_UNPACK (gf)                                               \
 590           ? scm_call_generic_2 ((gf), (a1), (a2))                       \
 591           : (scm_wrong_type_arg ((subr), (pos),                         \
 592                                  (pos) == SCM_ARG1 ? (a1) : (a2)),      \
 593              SCM_UNSPECIFIED))
 594 #define SCM_GASSERT2(cond, gf, a1, a2, pos, subr) \
 595   if (!(cond)) SCM_WTA_DISPATCH_2((gf), (a1), (a2), (pos), (subr))
 596
 597 extern SCM scm_apply_generic (SCM gf, SCM args);
 598
 599 #define SCM_WTA_DISPATCH_n(gf, args, pos, subr)                           \
 600   return (SCM_UNPACK (gf)                                                 \
 601           ? scm_apply_generic ((gf), (args))                              \
 602           : (scm_wrong_type_arg ((subr), (pos),                           \
 603                                  scm_list_ref ((args),                    \
 604                                                SCM_MAKINUM ((pos) - 1))), \
 605              SCM_UNSPECIFIED))
 606 #define SCM_GASSERTn(cond, gf, args, pos, subr) \
 607   if (!(cond)) SCM_WTA_DISPATCH_n((gf), (args), (pos), (subr))
 608
 609 #ifndef SCM_MAGIC_SNARFER
 610 /* Let these macros pass through if
 611    we are snarfing;  thus we can tell the
 612    difference between the use of an actual
 613    number vs. the use of one of these macros --
 614    actual numbers in SCM_VALIDATE_* and SCM_ASSERT
 615    constructs must match the formal argument name,
 616    but using SCM_ARG* avoids the test */
 617
 618 #define SCM_ARGn                0
 619 #define SCM_ARG1                1
 620 #define SCM_ARG2                2
 621 #define SCM_ARG3                3
 622 #define SCM_ARG4                4
 623 #define SCM_ARG5                5
 624 #define SCM_ARG6                6
 625 #define SCM_ARG7                7
 626
 627 #if (SCM_DEBUG_DEPRECATED == 0)
 628
 629 /* Use SCM_WRONG_NUM_ARGS instead of: */
 630 #define SCM_WNA                 8
 631
 632 /* Use SCM_ASSERT_RANGE or SCM_VALIDATE_XXX_RANGE instead of: */
 633 #define SCM_OUTOFRANGE         10
 634
 635 /* Use scm_memory_error instead of: */
 636 #define SCM_NALLOC             11
 637
 638 #define SCM_HUP_SIGNAL         14
 639 #define SCM_INT_SIGNAL         15
 640 #define SCM_FPE_SIGNAL         16
 641 #define SCM_BUS_SIGNAL         17
 642 #define SCM_SEGV_SIGNAL        18
 643 #define SCM_ALRM_SIGNAL        19
 644 #define SCM_GC_SIGNAL          20
 645 #define SCM_TICK_SIGNAL        21
 646 #define SCM_SIG_ORD(X)         ((X) - SCM_HUP_SIGNAL)
 647 #define SCM_ORD_SIG(X)         ((X) + SCM_HUP_SIGNAL)
 648 #define SCM_NUM_SIGS           (SCM_SIG_ORD (SCM_TICK_SIGNAL) + 1)
 649
 650 #endif  /* SCM_DEBUG_DEPRECATED == 0 */
 651
 652 #endif /* SCM_MAGIC_SNARFER */
 653
 654 \f
 655
 656 /* SCM_EXIT_SUCCESS is the default code to return from SCM if no errors
 657  * were encountered.  SCM_EXIT_FAILURE is the default code to return from
 658  * SCM if errors were encountered.  The return code can be explicitly
 659  * specified in a SCM program with (scm_quit <n>).
 660  */
 661
 662 #ifndef SCM_EXIT_SUCCESS
 663 #ifdef vms
 664 #define SCM_EXIT_SUCCESS 1
 665 #else
 666 #define SCM_EXIT_SUCCESS 0
 667 #endif /* def vms */
 668 #endif /* ndef SCM_EXIT_SUCCESS */
 669 #ifndef SCM_EXIT_FAILURE
 670 #ifdef vms
 671 #define SCM_EXIT_FAILURE 2
 672 #else
 673 #define SCM_EXIT_FAILURE 1
 674 #endif /* def vms */
 675 #endif /* ndef SCM_EXIT_FAILURE */
 676
 677 \f
 678
 679 #endif  /* SCM___SCM_H */
 680
 681 /*
 682   Local Variables:
 683   c-file-style: "gnu"
 684   End:
 685 */