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
 104  * when the function position (whose value is the closure) of a
 105  * combination is not an ILOC or a variable (true?).  When the
 106  * function position of a combination is a symbol it will be checked
 107  * only the first time it is evaluated because it will then be
 108  * replaced with an ILOC or variable.
 109  */
 110 #undef SCM_RECKLESS
 111 #define SCM_CAUTIOUS
 112
 113 /* After looking up a local for the first time, rewrite the
 114  * code graph, caching its position.
 115  */
 116 #define MEMOIZE_LOCALS
 117
 118 /* All the number support there is.
 119  */
 120 #define BIGNUMS
 121
 122 /* GC should relinquish empty cons-pair arenas. */
 123 /* cmm:FIXME look at this after done mangling the GC */
 124 /* #define GC_FREE_SEGMENTS */
 125
 126 /* Provide a scheme-accessible count-down timer that
 127  * generates a pseudo-interrupt.
 128  */
 129 #define TICKS
 130
 131
 132 /* Use engineering notation when converting numbers strings?
 133  */
 134 #undef ENGNOT
 135
 136 \f
 137 /* {Unsupported Options}
 138  *
 139  * These must be defined as given here.
 140  */
 141
 142
 143 #define CCLO
 144
 145 /* Guile Scheme supports the #f/() distinction; Guile Lisp won't.  We
 146    have horrible plans for their unification.  */
 147 #undef SICP
 148
 149 \f
 150
 151 /* Random options (not yet supported or in final form). */
 152
 153 #define STACK_CHECKING
 154 #undef NO_CEVAL_STACK_CHECKING
 155
 156 \f
 157
 158 /* What did the configure script discover about the outside world?  */
 159 #include "libguile/scmconfig.h"
 160
 161 \f
 162
 163 /* {Debugging Options}
 164  *
 165  * These compile time options determine whether to include code that is only
 166  * useful for debugging guile itself or C level extensions to guile.  The
 167  * common prefix for all option macros of this kind is "SCM_DEBUG_".  It is
 168  * guaranteed that a macro named SCM_DEBUG_XXX is defined to be either 0 or 1,
 169  * i. e. there is no need to test for the undefined case.  This allows to use
 170  * these definitions comfortably in macro code, as in the following example:
 171  *   #define FOO do { if (SCM_DEBUG_XXX) bar(); else baz(); } while (0)
 172  * Any sane compiler will remove the unused branch without any performance
 173  * penalty for the resulting code.
 174  *
 175  * Note:  Some SCM_DEBUG_XXX options are not settable at configure time.
 176  * To change the value of such options you will have to edit this header
 177  * file or give suitable options to make, like:
 178  *   make all CFLAGS="-DSCM_DEBUG_XXX=1 ..."
 179  */
 180
 181
 182 /* The value of SCM_DEBUG determines the default for most of the not yet
 183  * defined debugging options.  This allows, for example, to enable most of the
 184  * debugging options by simply defining SCM_DEBUG as 1.
 185  */
 186 #ifndef SCM_DEBUG
 187 #define SCM_DEBUG 0
 188 #endif
 189
 190 /* If SCM_DEBUG_CELL_ACCESSES is set to 1, cell accesses will perform
 191  * exhaustive parameter checking:  It will be verified that cell parameters
 192  * actually point to a valid heap cell.  Note:  If this option is enabled,
 193  * guile will run about ten times slower than normally.
 194  */
 195 #ifndef SCM_DEBUG_CELL_ACCESSES
 196 #define SCM_DEBUG_CELL_ACCESSES SCM_DEBUG
 197 #endif
 198
 199 /* If SCM_DEBUG_DEPRECATED is set to 1, deprecated code is not compiled.  This
 200  * can be used by developers to get rid of references to deprecated code.
 201  */
 202 #ifndef SCM_DEBUG_DEPRECATED
 203 #define SCM_DEBUG_DEPRECATED SCM_DEBUG
 204 #endif
 205
 206 /* If SCM_DEBUG_INTERRUPTS is set to 1, with every deferring and allowing of
 207  * interrupts a consistency check will be performed.
 208  */
 209 #ifndef SCM_DEBUG_INTERRUPTS
 210 #define SCM_DEBUG_INTERRUPTS SCM_DEBUG
 211 #endif
 212
 213 /* If SCM_DEBUG_PAIR_ACCESSES is set to 1, accesses to cons cells will be
 214  * exhaustively checked.  Note:  If this option is enabled, guile will run
 215  * slower than normally.
 216  */
 217 #ifndef SCM_DEBUG_PAIR_ACCESSES
 218 #define SCM_DEBUG_PAIR_ACCESSES SCM_DEBUG
 219 #endif
 220
 221 /* If SCM_DEBUG_REST_ARGUMENT is set to 1, functions that take rest arguments
 222  * will check whether the rest arguments are actually passed as a proper list.
 223  * Otherwise, if SCM_DEBUG_REST_ARGUMENT is 0, functions that take rest
 224  * arguments will take it for granted that these are passed as a proper list.
 225  */
 226 #ifndef SCM_DEBUG_REST_ARGUMENT
 227 #define SCM_DEBUG_REST_ARGUMENT SCM_DEBUG
 228 #endif
 229
 230 /* Use this for _compile time_ type checking only, since the compiled result
 231  * will be quite inefficient.  The right way to make use of this option is to
 232  * do a 'make clean; make CFLAGS=-DSCM_DEBUG_TYPING_STRICTNESS=1', fix your
 233  * errors, and then do 'make clean; make'.
 234  */
 235 #ifndef SCM_DEBUG_TYPING_STRICTNESS
 236 #define SCM_DEBUG_TYPING_STRICTNESS 1
 237 #endif
 238
 239 /* If SCM_ENABLE_VCELLS is set to 1, a couple of functions that deal
 240  * with vcells are defined for compatibility reasons.  Supporting
 241  * vcells reduces performance however.
 242  *
 243  * We use a dedicated macro instead of just SCM_DEBUG_DEPRECATED so
 244  * that code the belongs to the `vcell' feature is easier to find.
 245  */
 246 #define SCM_ENABLE_VCELLS !SCM_DEBUG_DEPRECATED
 247
 248 \f
 249
 250 #ifdef HAVE_LONG_LONGS
 251
 252 /* Some auto-generated .h files contain unused prototypes
 253  * that need these typedefs.
 254  */
 255
 256 #if (SCM_DEBUG_DEPRECATED == 0)
 257 typedef long long long_long;
 258 typedef unsigned long long ulong_long;
 259 #endif
 260
 261 #endif /* HAVE_LONG_LONGS */
 262
 263 \f
 264
 265 /* {Architecture and compiler properties}
 266  *
 267  * Guile as of today can only work on systems which fulfill at least the
 268  * following requirements:
 269  * - long ints have at least 32 bits.
 270  *   Guile's type system is based on this assumption.
 271  * - long ints consist of at least four characters.
 272  *   It is assumed that cells, i. e. pairs of long ints, are eight character
 273  *   aligned, because three bits of a cell pointer are used for type data.
 274  * - sizeof (void*) == sizeof (long int)
 275  *   Pointers are stored in SCM objects, and sometimes SCM objects are passed
 276  *   as void*.  Thus, there has to be a one-to-one correspondence.
 277  * - numbers are encoded using two's complement.
 278  *   The implementation of the bitwise scheme level operations is based on
 279  *   this assumption.
 280  * - ... add more
 281  */
 282
 283 #ifndef HAVE_PTRDIFF_T
 284 typedef long ptrdiff_t;
 285 #endif
 286
 287 #ifdef HAVE_LIMITS_H
 288 # include <limits.h>
 289 #endif
 290
 291 #ifdef CHAR_BIT
 292 # define SCM_CHAR_BIT CHAR_BIT
 293 #else
 294 # define SCM_CHAR_BIT 8
 295 #endif
 296
 297 #ifdef LONG_BIT
 298 # define SCM_LONG_BIT LONG_BIT
 299 #else
 300 # define SCM_LONG_BIT (SCM_CHAR_BIT * sizeof (long) / sizeof (char))
 301 #endif
 302
 303 #ifdef UCHAR_MAX
 304 # define SCM_CHAR_CODE_LIMIT (UCHAR_MAX + 1L)
 305 #else
 306 # define SCM_CHAR_CODE_LIMIT 256L
 307 #endif
 308
 309 \f
 310
 311 #ifdef STDC_HEADERS
 312 # include <stdlib.h>
 313 # if HAVE_SYS_TYPES_H
 314 #  include <sys/types.h>
 315 # endif
 316 # if HAVE_SYS_STDTYPES_H
 317 #  include <sys/stdtypes.h>
 318 # endif
 319 #  include <stddef.h>
 320 #endif /* def STDC_HEADERS */
 321
 322 #if (SCM_DEBUG_DEPRECATED == 0)
 323 # define scm_sizet size_t
 324 #endif
 325
 326 \f
 327
 328 #include "libguile/tags.h"
 329
 330 \f
 331 #ifdef vms
 332 # ifndef CHEAP_CONTINUATIONS
 333    typedef int jmp_buf[17];
 334    extern int setjump(jmp_buf env);
 335    extern int longjump(jmp_buf env, int ret);
 336 #  define setjmp setjump
 337 #  define longjmp longjump
 338 # else
 339 #  include <setjmp.h>
 340 # endif
 341 #else                           /* ndef vms */
 342 # ifdef _CRAY1
 343     typedef int jmp_buf[112];
 344     extern int setjump(jmp_buf env);
 345     extern int longjump(jmp_buf env, int ret);
 346 #  define setjmp setjump
 347 #  define longjmp longjump
 348 # else                          /* ndef _CRAY1 */
 349 #  include <setjmp.h>
 350 # endif                         /* ndef _CRAY1 */
 351 #endif                          /* ndef vms */
 352
 353 /* James Clark came up with this neat one instruction fix for
 354  * continuations on the SPARC.  It flushes the register windows so
 355  * that all the state of the process is contained in the stack.
 356  */
 357
 358 #ifdef sparc
 359 # define SCM_FLUSH_REGISTER_WINDOWS asm("ta 3")
 360 #else
 361 # define SCM_FLUSH_REGISTER_WINDOWS /* empty */
 362 #endif
 363
 364 /* If stack is not longword aligned then
 365  */
 366
 367 /* #define SHORT_ALIGN */
 368 #ifdef THINK_C
 369 # define SHORT_ALIGN
 370 #endif
 371 #ifdef MSDOS
 372 # define SHORT_ALIGN
 373 #endif
 374 #ifdef atarist
 375 # define SHORT_ALIGN
 376 #endif
 377
 378 #ifdef SHORT_ALIGN
 379 typedef short SCM_STACKITEM;
 380 #else
 381 typedef long SCM_STACKITEM;
 382 #endif
 383 \f
 384
 385 #ifndef USE_THREADS
 386 #define SCM_CRITICAL_SECTION_START
 387 #define SCM_CRITICAL_SECTION_END
 388 #define SCM_THREAD_SWITCHING_CODE
 389 #endif
 390
 391 #ifdef GUILE_OLD_ASYNC_CLICK
 392 extern unsigned int scm_async_clock;
 393
 394 #define SCM_ASYNC_TICK \
 395 do { \
 396   if (0 == --scm_async_clock) \
 397     scm_async_click (); \
 398 } while(0)
 399 #else
 400 extern int scm_asyncs_pending_p;
 401
 402 #define SCM_ASYNC_TICK /*fixme* should change names */ \
 403 do { \
 404   if (scm_asyncs_pending_p) \
 405     scm_async_click (); \
 406 } while (0)
 407 #endif
 408
 409 #if (SCM_DEBUG_INTERRUPTS == 1)
 410 #include <stdio.h>
 411 #define SCM_CHECK_NOT_DISABLED \
 412   do { \
 413     if (scm_ints_disabled) \
 414       fprintf(stderr, "ints already disabled (at %s:%d)\n", \
 415               __FILE__, __LINE__); \
 416   } while (0)
 417
 418 #define SCM_CHECK_NOT_ENABLED \
 419   do { \
 420     if (!scm_ints_disabled) \
 421       fprintf(stderr, "ints already enabled (at %s:%d)\n", \
 422               __FILE__, __LINE__); \
 423   } while (0)
 424
 425 #else
 426 #define SCM_CHECK_NOT_DISABLED
 427 #define SCM_CHECK_NOT_ENABLED
 428 #endif
 429
 430
 431 /* Anthony Green writes:
 432    When the compiler sees...
 433            DEFER_INTS;
 434            [critical code here]
 435            ALLOW_INTS;
 436    ...it doesn't actually promise to keep the critical code within the
 437    boundries of the DEFER/ALLOW_INTS instructions. It may very well
 438    schedule it outside of the magic defined in those macros.
 439
 440    However, GCC's volatile asm feature forms a barrier over which code is
 441    never moved. So if you add...
 442            asm ("");
 443    ...to each of the DEFER_INTS and ALLOW_INTS macros, the critical
 444    code will always remain in place.  asm's without inputs or outputs
 445    are implicitly volatile. */
 446 #ifdef __GNUC__
 447 #define SCM_FENCE asm /* volatile */ ("")
 448 #else
 449 #define SCM_FENCE
 450 #endif
 451
 452 #define SCM_DEFER_INTS \
 453 do { \
 454   SCM_FENCE; \
 455   SCM_CHECK_NOT_DISABLED; \
 456   SCM_CRITICAL_SECTION_START; \
 457   SCM_FENCE; \
 458   scm_ints_disabled = 1; \
 459   SCM_FENCE; \
 460 } while (0)
 461
 462
 463 #define SCM_ALLOW_INTS_ONLY \
 464 do { \
 465   SCM_CRITICAL_SECTION_END; \
 466   scm_ints_disabled = 0; \
 467 } while (0)
 468
 469
 470 #define SCM_ALLOW_INTS \
 471 do { \
 472   SCM_FENCE; \
 473   SCM_CHECK_NOT_ENABLED; \
 474   SCM_CRITICAL_SECTION_END; \
 475   SCM_FENCE; \
 476   scm_ints_disabled = 0; \
 477   SCM_FENCE; \
 478   SCM_THREAD_SWITCHING_CODE; \
 479   SCM_FENCE; \
 480 } while (0)
 481
 482
 483 #define SCM_REDEFER_INTS  \
 484 do { \
 485   SCM_FENCE; \
 486   SCM_CRITICAL_SECTION_START; \
 487   ++scm_ints_disabled; \
 488   SCM_FENCE; \
 489 } while (0)
 490
 491
 492 #define SCM_REALLOW_INTS \
 493 do { \
 494   SCM_FENCE; \
 495   SCM_CRITICAL_SECTION_END; \
 496   SCM_FENCE; \
 497   --scm_ints_disabled; \
 498   SCM_FENCE; \
 499 } while (0)
 500
 501
 502 #define SCM_TICK \
 503 do { \
 504   SCM_ASYNC_TICK; \
 505   SCM_THREAD_SWITCHING_CODE; \
 506 } while (0)
 507
 508 \f
 509
 510 /* Classification of critical sections
 511  *
 512  * When Guile moves to POSIX threads, it won't be possible to prevent
 513  * context switching.  In fact, the whole idea of context switching is
 514  * bogus if threads are run by different processors.  Therefore, we
 515  * must ultimately eliminate all critical sections or enforce them by
 516  * use of mutecis.
 517  *
 518  * All instances of SCM_DEFER_INTS and SCM_ALLOW_INTS should therefore
 519  * be classified and replaced by one of the delimiters below.  If you
 520  * understand what this is all about, I'd like to encourage you to
 521  * help with this task.  The set of classes below must of course be
 522  * incrementally augmented.
 523  *
 524  * MDJ 980419 <djurfeldt@nada.kth.se>
 525  */
 526
 527 /* A sections
 528  *
 529  * Allocation of a cell with type tag in the CAR.
 530  *
 531  * With POSIX threads, each thread will have a private pool of free
 532  * cells.  Therefore, this type of section can be removed.  But!  It
 533  * is important that the CDR is initialized first (with the CAR still
 534  * indicating a free cell) so that we can guarantee a consistent heap
 535  * at all times.
 536  */
 537
 538 #define SCM_ENTER_A_SECTION SCM_CRITICAL_SECTION_START
 539 #define SCM_EXIT_A_SECTION SCM_CRITICAL_SECTION_END
 540
 541 \f
 542
 543 /** SCM_ASSERT
 544  **
 545  **/
 546
 547
 548 #ifdef SCM_RECKLESS
 549 #define SCM_ASSERT(_cond, _arg, _pos, _subr)
 550 #define SCM_ASSERT_TYPE(_cond, _arg, _pos, _subr, _msg)
 551 #define SCM_ASRTGO(_cond, _label)
 552 #else
 553 #define SCM_ASSERT(_cond, _arg, _pos, _subr) \
 554         if (!(_cond)) \
 555           scm_wrong_type_arg (_subr, _pos, _arg)
 556 #define SCM_ASSERT_TYPE(_cond, _arg, _pos, _subr, _msg) \
 557         if (!(_cond)) \
 558           scm_wrong_type_arg_msg(_subr, _pos, _arg, _msg)
 559 #define SCM_ASRTGO(_cond, _label) \
 560         if (!(_cond)) \
 561           goto _label
 562 #endif
 563
 564 /*
 565  * SCM_WTA_DISPATCH
 566  */
 567
 568 /* Dirk:FIXME:: In all of the SCM_WTA_DISPATCH_* macros it is assumed that
 569  * 'gf' is zero if uninitialized.  It would be cleaner if some valid SCM value
 570  * like SCM_BOOL_F or SCM_UNDEFINED was chosen.
 571  */
 572
 573 extern SCM scm_call_generic_0 (SCM gf);
 574
 575 #define SCM_WTA_DISPATCH_0(gf, subr)                            \
 576   return (SCM_UNPACK (gf)                                       \
 577           ? scm_call_generic_0 ((gf))                           \
 578           : (scm_error_num_args_subr ((subr)), SCM_UNSPECIFIED))
 579 #define SCM_GASSERT0(cond, gf, subr) \
 580   if (!(cond)) SCM_WTA_DISPATCH_0((gf), (subr))
 581
 582 extern SCM scm_call_generic_1 (SCM gf, SCM a1);
 583
 584 #define SCM_WTA_DISPATCH_1(gf, a1, pos, subr)                   \
 585   return (SCM_UNPACK (gf)                                       \
 586           ? scm_call_generic_1 ((gf), (a1))                     \
 587           : (scm_wrong_type_arg ((subr), (pos), (a1)), SCM_UNSPECIFIED))
 588 #define SCM_GASSERT1(cond, gf, a1, pos, subr) \
 589   if (!(cond)) SCM_WTA_DISPATCH_1((gf), (a1), (pos), (subr))
 590
 591 extern SCM scm_call_generic_2 (SCM gf, SCM a1, SCM a2);
 592
 593 #define SCM_WTA_DISPATCH_2(gf, a1, a2, pos, subr)                       \
 594   return (SCM_UNPACK (gf)                                               \
 595           ? scm_call_generic_2 ((gf), (a1), (a2))                       \
 596           : (scm_wrong_type_arg ((subr), (pos),                         \
 597                                  (pos) == SCM_ARG1 ? (a1) : (a2)),      \
 598              SCM_UNSPECIFIED))
 599 #define SCM_GASSERT2(cond, gf, a1, a2, pos, subr) \
 600   if (!(cond)) SCM_WTA_DISPATCH_2((gf), (a1), (a2), (pos), (subr))
 601
 602 extern SCM scm_apply_generic (SCM gf, SCM args);
 603
 604 #define SCM_WTA_DISPATCH_n(gf, args, pos, subr)                           \
 605   return (SCM_UNPACK (gf)                                                 \
 606           ? scm_apply_generic ((gf), (args))                              \
 607           : (scm_wrong_type_arg ((subr), (pos),                           \
 608                                  scm_list_ref ((args),                    \
 609                                                SCM_MAKINUM ((pos) - 1))), \
 610              SCM_UNSPECIFIED))
 611 #define SCM_GASSERTn(cond, gf, args, pos, subr) \
 612   if (!(cond)) SCM_WTA_DISPATCH_n((gf), (args), (pos), (subr))
 613
 614 #ifndef SCM_MAGIC_SNARFER
 615 /* Let these macros pass through if
 616    we are snarfing;  thus we can tell the
 617    difference between the use of an actual
 618    number vs. the use of one of these macros --
 619    actual numbers in SCM_VALIDATE_* and SCM_ASSERT
 620    constructs must match the formal argument name,
 621    but using SCM_ARG* avoids the test */
 622
 623 #define SCM_ARGn                0
 624 #define SCM_ARG1                1
 625 #define SCM_ARG2                2
 626 #define SCM_ARG3                3
 627 #define SCM_ARG4                4
 628 #define SCM_ARG5                5
 629 #define SCM_ARG6                6
 630 #define SCM_ARG7                7
 631
 632 #if (SCM_DEBUG_DEPRECATED == 0)
 633
 634 /* Use SCM_WRONG_NUM_ARGS instead of: */
 635 #define SCM_WNA                 8
 636
 637 /* Use SCM_ASSERT_RANGE or SCM_VALIDATE_XXX_RANGE instead of: */
 638 #define SCM_OUTOFRANGE         10
 639
 640 /* Use scm_memory_error instead of: */
 641 #define SCM_NALLOC             11
 642
 643 #define SCM_HUP_SIGNAL         14
 644 #define SCM_INT_SIGNAL         15
 645 #define SCM_FPE_SIGNAL         16
 646 #define SCM_BUS_SIGNAL         17
 647 #define SCM_SEGV_SIGNAL        18
 648 #define SCM_ALRM_SIGNAL        19
 649 #define SCM_GC_SIGNAL          20
 650 #define SCM_TICK_SIGNAL        21
 651 #define SCM_SIG_ORD(X)         ((X) - SCM_HUP_SIGNAL)
 652 #define SCM_ORD_SIG(X)         ((X) + SCM_HUP_SIGNAL)
 653 #define SCM_NUM_SIGS           (SCM_SIG_ORD (SCM_TICK_SIGNAL) + 1)
 654
 655 #endif  /* SCM_DEBUG_DEPRECATED == 0 */
 656
 657 #endif /* SCM_MAGIC_SNARFER */
 658
 659 \f
 660
 661 /* SCM_EXIT_SUCCESS is the default code to return from SCM if no errors
 662  * were encountered.  SCM_EXIT_FAILURE is the default code to return from
 663  * SCM if errors were encountered.  The return code can be explicitly
 664  * specified in a SCM program with (scm_quit <n>).
 665  */
 666
 667 #ifndef SCM_EXIT_SUCCESS
 668 #ifdef vms
 669 #define SCM_EXIT_SUCCESS 1
 670 #else
 671 #define SCM_EXIT_SUCCESS 0
 672 #endif /* def vms */
 673 #endif /* ndef SCM_EXIT_SUCCESS */
 674 #ifndef SCM_EXIT_FAILURE
 675 #ifdef vms
 676 #define SCM_EXIT_FAILURE 2
 677 #else
 678 #define SCM_EXIT_FAILURE 1
 679 #endif /* def vms */
 680 #endif /* ndef SCM_EXIT_FAILURE */
 681
 682 \f
 683
 684 #endif  /* SCM___SCM_H */
 685
 686 /*
 687   Local Variables:
 688   c-file-style: "gnu"
 689   End:
 690 */