libguile/_scm.h

   1 /* classes: h_files */
   2
   3 #ifndef _SCMH
   4 #define _SCMH
   5 /*      Copyright (C) 1995,1996, 2000 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 #include "__scm.h"
  48
  49 /* "What's the difference between _scm.h and __scm.h?"
  50
  51    _scm.h is not installed; it's only visible to the libguile sources
  52    themselves.
  53
  54    __scm.h is installed, and is #included by <libguile.h>.  If both
  55    the client and libguile need some piece of information, and it
  56    doesn't fit well into the header file for any particular module, it
  57    should go in __scm.h.  */
  58
  59
  60
  61 /* Include headers for those files central to the implementation.  The
  62    rest should be explicitly #included in the C files themselves.  */
  63 #include "error.h"              /* Everyone signals errors.  */
  64 #include "print.h"              /* Everyone needs to print.  */
  65 #include "pairs.h"              /* Everyone conses.  */
  66 #include "list.h"               /* Everyone makes lists.  */
  67 #include "gc.h"                 /* Everyone allocates.  */
  68 #include "gsubr.h"              /* Everyone defines global functions.  */
  69 #include "procs.h"              /* Same.  */
  70 #include "numbers.h"            /* Everyone deals with fixnums.  */
  71 #include "symbols.h"            /* For length, chars, values, miscellany.  */
  72 #include "boolean.h"            /* Everyone wonders about the truth.  */
  73 #include "root.h"               /* Everyone uses these objects.  */
  74 #include "async.h"              /* Everyone allows/disallows ints.  */
  75 #ifdef USE_THREADS
  76 #include "threads.h"            /* The cooperative thread package does
  77                                    switching at async ticks.  */
  78 #endif
  79 #include "snarf.h"              /* Everyone snarfs. */
  80
  81 /* On VMS, GNU C's errno.h contains a special hack to get link attributes
  82  * for errno correct for linking to the C RTL.
  83  */
  84 #include <errno.h>
  85
  86 /* SCM_SYSCALL retries system calls that have been interrupted (EINTR).
  87    However this can be avoided if the operating system can restart
  88    system calls automatically.  We assume this is the case if
  89    sigaction is available and SA_RESTART is defined; they will be used
  90    when installing signal handlers.
  91    */
  92
  93 #ifdef HAVE_RESTARTABLE_SYSCALLS
  94 #define SCM_SYSCALL(line) line
  95 #endif
  96
  97 #ifndef SCM_SYSCALL
  98 #ifdef vms
  99 # ifndef __GNUC__
 100 #  include <ssdef.h>
 101 #  define SCM_SYSCALL(line) do{errno = 0;line;} \
 102         while(EVMSERR==errno && (vaxc$errno>>3)==(SS$_CONTROLC>>3))
 103 # endif /* ndef __GNUC__ */
 104 #endif /* def vms */
 105 #endif /* ndef SCM_SYSCALL  */
 106
 107 #ifndef SCM_SYSCALL
 108 # ifdef EINTR
 109 #  if (EINTR > 0)
 110 #   define SCM_SYSCALL(line) do{errno = 0;line;}while(EINTR==errno)
 111 #  endif /*  (EINTR > 0) */
 112 # endif /* def EINTR */
 113 #endif /* ndef SCM_SYSCALL */
 114
 115 #ifndef SCM_SYSCALL
 116 # define SCM_SYSCALL(line) line;
 117 #endif /* ndef SCM_SYSCALL */
 118
 119 #ifndef MSDOS
 120 # ifdef ARM_ULIB
 121     extern volatile int errno;
 122 # else
 123     extern int errno;
 124 # endif /* def ARM_ULIB */
 125 #endif /* ndef MSDOS */
 126 #ifdef __TURBOC__
 127 # if (__TURBOC__==1)
 128  /* Needed for TURBOC V1.0 */
 129  extern int errno;
 130 # endif /*  (__TURBOC__==1) */
 131 #endif /* def __TURBOC__ */
 132
 133 \f
 134
 135 #ifndef min
 136 #define min(A,B) ((A) <= (B) ? (A) : (B))
 137 #endif
 138 #ifndef max
 139 #define max(A,B) ((A) >= (B) ? (A) : (B))
 140 #endif
 141
 142 #endif  /* _SCMH */
 143