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 #ifndef HAVE_PTRDIFF_T
 283 typedef long ptrdiff_t;
 284 #endif
 285
 286 #ifdef HAVE_LIMITS_H
 287 # include <limits.h>
 288 #endif
 289
 290 #ifdef CHAR_BIT
 291 # define SCM_CHAR_BIT CHAR_BIT
 292 #else
 293 # define SCM_CHAR_BIT 8
 294 #endif
 295
 296 #ifdef LONG_BIT
 297 # define SCM_LONG_BIT LONG_BIT
 298 #else
 299 # define SCM_LONG_BIT (SCM_CHAR_BIT * sizeof (long) / sizeof (char))
 300 #endif
 301
 302 #ifdef UCHAR_MAX
 303 # define SCM_CHAR_CODE_LIMIT (UCHAR_MAX + 1L)
 304 #else
 305 # define SCM_CHAR_CODE_LIMIT 256L
 306 #endif
 307
 308 \f
 309
 310 #ifdef STDC_HEADERS
 311 # include <stdlib.h>
 312 # if HAVE_SYS_TYPES_H
 313 #  include <sys/types.h>
 314 # endif
 315 # if HAVE_SYS_STDTYPES_H
 316 #  include <sys/stdtypes.h>
 317 # endif
 318 #  include <stddef.h>
 319 #endif /* def STDC_HEADERS */
 320
 321 #if (SCM_DEBUG_DEPRECATED == 0)
 322 # define scm_sizet size_t
 323 #endif
 324
 325 \f
 326
 327 #include "libguile/tags.h"
 328
 329 \f
 330 #ifdef vms
 331 # ifndef CHEAP_CONTINUATIONS
 332    typedef int jmp_buf[17];
 333    extern int setjump(jmp_buf env);
 334    extern int longjump(jmp_buf env, int ret);
 335 #  define setjmp setjump
 336 #  define longjmp longjump
 337 # else
 338 #  include <setjmp.h>
 339 # endif
 340 #else                           /* ndef vms */
 341 # ifdef _CRAY1
 342     typedef int jmp_buf[112];
 343     extern int setjump(jmp_buf env);
 344     extern int longjump(jmp_buf env, int ret);
 345 #  define setjmp setjump
 346 #  define longjmp longjump
 347 # else                          /* ndef _CRAY1 */
 348 #  include <setjmp.h>
 349 # endif                         /* ndef _CRAY1 */
 350 #endif                          /* ndef vms */
 351
 352 /* James Clark came up with this neat one instruction fix for
 353  * continuations on the SPARC.  It flushes the register windows so
 354  * that all the state of the process is contained in the stack.
 355  */
 356
 357 #ifdef sparc
 358 # define SCM_FLUSH_REGISTER_WINDOWS asm("ta 3")
 359 #else
 360 # define SCM_FLUSH_REGISTER_WINDOWS /* empty */
 361 #endif
 362
 363 /* If stack is not longword aligned then
 364  */
 365
 366 /* #define SHORT_ALIGN */
 367 #ifdef THINK_C
 368 # define SHORT_ALIGN
 369 #endif
 370 #ifdef MSDOS
 371 # define SHORT_ALIGN
 372 #endif
 373 #ifdef atarist
 374 # define SHORT_ALIGN
 375 #endif
 376
 377 #ifdef SHORT_ALIGN
 378 typedef short SCM_STACKITEM;
 379 #else
 380 typedef long SCM_STACKITEM;
 381 #endif
 382 \f
 383
 384 #ifndef USE_THREADS
 385 #define SCM_CRITICAL_SECTION_START
 386 #define SCM_CRITICAL_SECTION_END
 387 #define SCM_THREAD_SWITCHING_CODE
 388 #endif
 389
 390 #ifdef GUILE_OLD_ASYNC_CLICK
 391 extern unsigned int scm_async_clock;
 392
 393 #define SCM_ASYNC_TICK \
 394 do { \
 395   if (0 == --scm_async_clock) \
 396     scm_async_click (); \
 397 } while(0)
 398 #else
 399 extern int scm_asyncs_pending_p;
 400
 401 #define SCM_ASYNC_TICK /*fixme* should change names */ \
 402 do { \
 403   if (scm_asyncs_pending_p) \
 404     scm_async_click (); \
 405 } while (0)
 406 #endif
 407
 408 #if (SCM_DEBUG_INTERRUPTS == 1)
 409 #include <stdio.h>
 410 #define SCM_CHECK_NOT_DISABLED \
 411   do { \
 412     if (scm_ints_disabled) \
 413       fprintf(stderr, "ints already disabled (at %s:%d)\n", \
 414               __FILE__, __LINE__); \
 415   } while (0)
 416
 417 #define SCM_CHECK_NOT_ENABLED \
 418   do { \
 419     if (!scm_ints_disabled) \
 420       fprintf(stderr, "ints already enabled (at %s:%d)\n", \
 421               __FILE__, __LINE__); \
 422   } while (0)
 423
 424 #else
 425 #define SCM_CHECK_NOT_DISABLED
 426 #define SCM_CHECK_NOT_ENABLED
 427 #endif
 428
 429
 430 /* Anthony Green writes:
 431    When the compiler sees...
 432            DEFER_INTS;
 433            [critical code here]
 434            ALLOW_INTS;
 435    ...it doesn't actually promise to keep the critical code within the
 436    boundries of the DEFER/ALLOW_INTS instructions. It may very well
 437    schedule it outside of the magic defined in those macros.
 438
 439    However, GCC's volatile asm feature forms a barrier over which code is
 440    never moved. So if you add...
 441            asm ("");
 442    ...to each of the DEFER_INTS and ALLOW_INTS macros, the critical
 443    code will always remain in place.  asm's without inputs or outputs
 444    are implicitly volatile. */
 445 #ifdef __GNUC__
 446 #define SCM_FENCE asm /* volatile */ ("")
 447 #else
 448 #define SCM_FENCE
 449 #endif
 450
 451 #define SCM_DEFER_INTS \
 452 do { \
 453   SCM_FENCE; \
 454   SCM_CHECK_NOT_DISABLED; \
 455   SCM_CRITICAL_SECTION_START; \
 456   SCM_FENCE; \
 457   scm_ints_disabled = 1; \
 458   SCM_FENCE; \
 459 } while (0)
 460
 461
 462 #define SCM_ALLOW_INTS_ONLY \
 463 do { \
 464   SCM_CRITICAL_SECTION_END; \
 465   scm_ints_disabled = 0; \
 466 } while (0)
 467
 468
 469 #define SCM_ALLOW_INTS \
 470 do { \
 471   SCM_FENCE; \
 472   SCM_CHECK_NOT_ENABLED; \
 473   SCM_CRITICAL_SECTION_END; \
 474   SCM_FENCE; \
 475   scm_ints_disabled = 0; \
 476   SCM_FENCE; \
 477   SCM_THREAD_SWITCHING_CODE; \
 478   SCM_FENCE; \
 479 } while (0)
 480
 481
 482 #define SCM_REDEFER_INTS  \
 483 do { \
 484   SCM_FENCE; \
 485   SCM_CRITICAL_SECTION_START; \
 486   ++scm_ints_disabled; \
 487   SCM_FENCE; \
 488 } while (0)
 489
 490
 491 #define SCM_REALLOW_INTS \
 492 do { \
 493   SCM_FENCE; \
 494   SCM_CRITICAL_SECTION_END; \
 495   SCM_FENCE; \
 496   --scm_ints_disabled; \
 497   SCM_FENCE; \
 498 } while (0)
 499
 500
 501 #define SCM_TICK \
 502 do { \
 503   SCM_ASYNC_TICK; \
 504   SCM_THREAD_SWITCHING_CODE; \
 505 } while (0)
 506
 507 \f
 508
 509 /* Classification of critical sections
 510  *
 511  * When Guile moves to POSIX threads, it won't be possible to prevent
 512  * context switching.  In fact, the whole idea of context switching is
 513  * bogus if threads are run by different processors.  Therefore, we
 514  * must ultimately eliminate all critical sections or enforce them by
 515  * use of mutecis.
 516  *
 517  * All instances of SCM_DEFER_INTS and SCM_ALLOW_INTS should therefore
 518  * be classified and replaced by one of the delimiters below.  If you
 519  * understand what this is all about, I'd like to encourage you to
 520  * help with this task.  The set of classes below must of course be
 521  * incrementally augmented.
 522  *
 523  * MDJ 980419 <djurfeldt@nada.kth.se>
 524  */
 525
 526 /* A sections
 527  *
 528  * Allocation of a cell with type tag in the CAR.
 529  *
 530  * With POSIX threads, each thread will have a private pool of free
 531  * cells.  Therefore, this type of section can be removed.  But!  It
 532  * is important that the CDR is initialized first (with the CAR still
 533  * indicating a free cell) so that we can guarantee a consistent heap
 534  * at all times.
 535  */
 536
 537 #define SCM_ENTER_A_SECTION SCM_CRITICAL_SECTION_START
 538 #define SCM_EXIT_A_SECTION SCM_CRITICAL_SECTION_END
 539
 540 \f
 541
 542 /** SCM_ASSERT
 543  **
 544  **/
 545
 546
 547 #ifdef SCM_RECKLESS
 548 #define SCM_ASSERT(_cond, _arg, _pos, _subr)
 549 #define SCM_ASSERT_TYPE(_cond, _arg, _pos, _subr, _msg)
 550 #define SCM_ASRTGO(_cond, _label)
 551 #else
 552 #define SCM_ASSERT(_cond, _arg, _pos, _subr) \
 553         if (!(_cond)) \
 554           scm_wrong_type_arg (_subr, _pos, _arg)
 555 #define SCM_ASSERT_TYPE(_cond, _arg, _pos, _subr, _msg) \
 556         if (!(_cond)) \
 557           scm_wrong_type_arg_msg(_subr, _pos, _arg, _msg)
 558 #define SCM_ASRTGO(_cond, _label) \
 559         if (!(_cond)) \
 560           goto _label
 561 #endif
 562
 563 /*
 564  * SCM_WTA_DISPATCH
 565  */
 566
 567 /* Dirk:FIXME:: In all of the SCM_WTA_DISPATCH_* macros it is assumed that
 568  * 'gf' is zero if uninitialized.  It would be cleaner if some valid SCM value
 569  * like SCM_BOOL_F or SCM_UNDEFINED was chosen.
 570  */
 571
 572 extern SCM scm_call_generic_0 (SCM gf);
 573
 574 #define SCM_WTA_DISPATCH_0(gf, subr)                            \
 575   return (SCM_UNPACK (gf)                                       \
 576           ? scm_call_generic_0 ((gf))                           \
 577           : (scm_error_num_args_subr ((subr)), SCM_UNSPECIFIED))
 578 #define SCM_GASSERT0(cond, gf, subr) \
 579   if (!(cond)) SCM_WTA_DISPATCH_0((gf), (subr))
 580
 581 extern SCM scm_call_generic_1 (SCM gf, SCM a1);
 582
 583 #define SCM_WTA_DISPATCH_1(gf, a1, pos, subr)                   \
 584   return (SCM_UNPACK (gf)                                       \
 585           ? scm_call_generic_1 ((gf), (a1))                     \
 586           : (scm_wrong_type_arg ((subr), (pos), (a1)), SCM_UNSPECIFIED))
 587 #define SCM_GASSERT1(cond, gf, a1, pos, subr) \
 588   if (!(cond)) SCM_WTA_DISPATCH_1((gf), (a1), (pos), (subr))
 589
 590 extern SCM scm_call_generic_2 (SCM gf, SCM a1, SCM a2);
 591
 592 #define SCM_WTA_DISPATCH_2(gf, a1, a2, pos, subr)                       \
 593   return (SCM_UNPACK (gf)                                               \
 594           ? scm_call_generic_2 ((gf), (a1), (a2))                       \
 595           : (scm_wrong_type_arg ((subr), (pos),                         \
 596                                  (pos) == SCM_ARG1 ? (a1) : (a2)),      \
 597              SCM_UNSPECIFIED))
 598 #define SCM_GASSERT2(cond, gf, a1, a2, pos, subr) \
 599   if (!(cond)) SCM_WTA_DISPATCH_2((gf), (a1), (a2), (pos), (subr))
 600
 601 extern SCM scm_apply_generic (SCM gf, SCM args);
 602
 603 #define SCM_WTA_DISPATCH_n(gf, args, pos, subr)                           \
 604   return (SCM_UNPACK (gf)                                                 \
 605           ? scm_apply_generic ((gf), (args))                              \
 606           : (scm_wrong_type_arg ((subr), (pos),                           \
 607                                  scm_list_ref ((args),                    \
 608                                                SCM_MAKINUM ((pos) - 1))), \
 609              SCM_UNSPECIFIED))
 610 #define SCM_GASSERTn(cond, gf, args, pos, subr) \
 611   if (!(cond)) SCM_WTA_DISPATCH_n((gf), (args), (pos), (subr))
 612
 613 #ifndef SCM_MAGIC_SNARFER
 614 /* Let these macros pass through if
 615    we are snarfing;  thus we can tell the
 616    difference between the use of an actual
 617    number vs. the use of one of these macros --
 618    actual numbers in SCM_VALIDATE_* and SCM_ASSERT
 619    constructs must match the formal argument name,
 620    but using SCM_ARG* avoids the test */
 621
 622 #define SCM_ARGn                0
 623 #define SCM_ARG1                1
 624 #define SCM_ARG2                2
 625 #define SCM_ARG3                3
 626 #define SCM_ARG4                4
 627 #define SCM_ARG5                5
 628 #define SCM_ARG6                6
 629 #define SCM_ARG7                7
 630
 631 #if (SCM_DEBUG_DEPRECATED == 0)
 632
 633 /* Use SCM_WRONG_NUM_ARGS instead of: */
 634 #define SCM_WNA                 8
 635
 636 /* Use SCM_ASSERT_RANGE or SCM_VALIDATE_XXX_RANGE instead of: */
 637 #define SCM_OUTOFRANGE         10
 638
 639 /* Use scm_memory_error instead of: */
 640 #define SCM_NALLOC             11
 641
 642 #define SCM_HUP_SIGNAL         14
 643 #define SCM_INT_SIGNAL         15
 644 #define SCM_FPE_SIGNAL         16
 645 #define SCM_BUS_SIGNAL         17
 646 #define SCM_SEGV_SIGNAL        18
 647 #define SCM_ALRM_SIGNAL        19
 648 #define SCM_GC_SIGNAL          20
 649 #define SCM_TICK_SIGNAL        21
 650 #define SCM_SIG_ORD(X)         ((X) - SCM_HUP_SIGNAL)
 651 #define SCM_ORD_SIG(X)         ((X) + SCM_HUP_SIGNAL)
 652 #define SCM_NUM_SIGS           (SCM_SIG_ORD (SCM_TICK_SIGNAL) + 1)
 653
 654 #endif  /* SCM_DEBUG_DEPRECATED == 0 */
 655
 656 #endif /* SCM_MAGIC_SNARFER */
 657
 658 \f
 659
 660 /* SCM_EXIT_SUCCESS is the default code to return from SCM if no errors
 661  * were encountered.  SCM_EXIT_FAILURE is the default code to return from
 662  * SCM if errors were encountered.  The return code can be explicitly
 663  * specified in a SCM program with (scm_quit <n>).
 664  */
 665
 666 #ifndef SCM_EXIT_SUCCESS
 667 #ifdef vms
 668 #define SCM_EXIT_SUCCESS 1
 669 #else
 670 #define SCM_EXIT_SUCCESS 0
 671 #endif /* def vms */
 672 #endif /* ndef SCM_EXIT_SUCCESS */
 673 #ifndef SCM_EXIT_FAILURE
 674 #ifdef vms
 675 #define SCM_EXIT_FAILURE 2
 676 #else
 677 #define SCM_EXIT_FAILURE 1
 678 #endif /* def vms */
 679 #endif /* ndef SCM_EXIT_FAILURE */
 680
 681 \f
 682
 683 #endif  /* SCM___SCM_H */
 684
 685 /*
 686   Local Variables:
 687   c-file-style: "gnu"
 688   End:
 689 */