1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273
|
/* Copyright (C) 1995, 1996, 1998, 1999, 2000 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA
*
* As a special exception, the Free Software Foundation gives permission
* for additional uses of the text contained in its release of GUILE.
*
* The exception is that, if you link the GUILE library with other files
* to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the GUILE library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the
* Free Software Foundation under the name GUILE. If you copy
* code from other Free Software Foundation releases into a copy of
* GUILE, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for GUILE, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice. */
/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
#include <stdio.h>
#include "libguile/_scm.h"
#include "libguile/objects.h"
#include "libguile/ports.h"
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
#include "libguile/smob.h"
/* scm_smobs scm_numsmob
* implement a dynamicly resized array of smob records.
* Indexes into this table are used when generating type
* tags for smobjects (if you know a tag you can get an index and conversely).
*/
int scm_numsmob;
scm_smob_descriptor *scm_smobs;
/* {Mark}
*/
/* This function is vestigial. It used to be the mark function's
responsibility to set the mark bit on the smob or port, but now the
generic marking routine in gc.c takes care of that, and a zero
pointer for a mark function means "don't bother". So you never
need scm_mark0.
However, we leave it here because it's harmless to call it, and
people out there have smob code that uses it, and there's no reason
to make their links fail. */
SCM
scm_mark0 (SCM ptr)
{
return SCM_BOOL_F;
}
SCM
scm_markcdr (SCM ptr)
{
return SCM_CDR (ptr);
}
/* {Free}
*/
scm_sizet
scm_free0 (SCM ptr)
{
return 0;
}
scm_sizet
scm_smob_free (SCM obj)
{
scm_must_free ((char *) SCM_CELL_WORD_1 (obj));
return scm_smobs[SCM_SMOBNUM (obj)].size;
}
/* {Print}
*/
int
scm_smob_print (SCM exp, SCM port, scm_print_state *pstate)
{
int n = SCM_SMOBNUM (exp);
scm_puts ("#<", port);
scm_puts (SCM_SMOBNAME (n) ? SCM_SMOBNAME (n) : "smob", port);
scm_putc (' ', port);
scm_intprint (SCM_UNPACK (scm_smobs[n].size ? SCM_CDR (exp) : exp), 16, port);
scm_putc ('>', port);
return 1;
}
long
scm_make_smob_type (char *name, scm_sizet size)
{
char *tmp;
if (255 <= scm_numsmob)
goto smoberr;
SCM_DEFER_INTS;
SCM_SYSCALL (tmp = (char *) realloc ((char *) scm_smobs,
(1 + scm_numsmob)
* sizeof (scm_smob_descriptor)));
if (tmp)
{
scm_smobs = (scm_smob_descriptor *) tmp;
scm_smobs[scm_numsmob].name = name;
scm_smobs[scm_numsmob].size = size;
scm_smobs[scm_numsmob].mark = 0;
scm_smobs[scm_numsmob].free = (size == 0 ? scm_free0 : scm_smob_free);
scm_smobs[scm_numsmob].print = scm_smob_print;
scm_smobs[scm_numsmob].equalp = 0;
scm_numsmob++;
}
SCM_ALLOW_INTS;
if (!tmp)
smoberr:scm_wta (SCM_MAKINUM ((long) scm_numsmob),
(char *) SCM_NALLOC, "scm_make_smob_type");
/* Make a class object if Goops is present. */
if (scm_smob_class)
scm_smob_class[scm_numsmob - 1]
= scm_make_extended_class (SCM_SMOBNAME (scm_numsmob - 1));
return scm_tc7_smob + (scm_numsmob - 1) * 256;
}
long
scm_make_smob_type_mfpe (char *name, scm_sizet size,
SCM (*mark) (SCM),
scm_sizet (*free) (SCM),
int (*print) (SCM, SCM, scm_print_state *),
SCM (*equalp) (SCM, SCM))
{
long answer = scm_make_smob_type (name, size);
scm_set_smob_mfpe (answer, mark, free, print, equalp);
return answer;
}
void
scm_set_smob_mark (long tc, SCM (*mark) (SCM))
{
scm_smobs[SCM_TC2SMOBNUM (tc)].mark = mark;
}
void
scm_set_smob_free (long tc, scm_sizet (*free) (SCM))
{
scm_smobs[SCM_TC2SMOBNUM (tc)].free = free;
}
void
scm_set_smob_print (long tc, int (*print) (SCM, SCM, scm_print_state*))
{
scm_smobs[SCM_TC2SMOBNUM (tc)].print = print;
}
void
scm_set_smob_equalp (long tc, SCM (*equalp) (SCM, SCM))
{
scm_smobs[SCM_TC2SMOBNUM (tc)].equalp = equalp;
}
void
scm_set_smob_mfpe (long tc,
SCM (*mark) (SCM),
scm_sizet (*free) (SCM),
int (*print) (SCM, SCM, scm_print_state *),
SCM (*equalp) (SCM, SCM))
{
if (mark) scm_set_smob_mark (tc, mark);
if (free) scm_set_smob_free (tc, free);
if (print) scm_set_smob_print (tc, print);
if (equalp) scm_set_smob_equalp (tc, equalp);
}
SCM
scm_make_smob (long tc)
{
int n = SCM_TC2SMOBNUM (tc);
scm_sizet size = scm_smobs[n].size;
SCM z;
SCM_NEWCELL (z);
if (size != 0)
{
#if 0
SCM_ASSERT (scm_smobs[n].mark == 0,
0,
"forbidden operation for smobs with GC data, use SCM_NEWSMOB",
SCM_SMOBNAME (n));
#endif
SCM_SET_SMOB_DATA (z, scm_must_malloc (size, SCM_SMOBNAME (n)));
}
SCM_SET_CELL_TYPE (z, tc);
return z;
}
/* {Initialization for i/o types, float, bignum, the type of free cells}
*/
static int
freeprint (SCM exp,
SCM port,
scm_print_state *pstate)
{
char buf[100];
sprintf (buf, "#<freed cell %p; GC missed a reference>", (void *) SCM_UNPACK (exp));
scm_puts (buf, port);
return 1;
}
void
scm_smob_prehistory ()
{
scm_numsmob = 0;
scm_smobs = ((scm_smob_descriptor *)
malloc (7 * sizeof (scm_smob_descriptor)));
/* WARNING: These scm_make_smob_type calls must be done in this order */
scm_make_smob_type_mfpe ("free", 0,
NULL, NULL, freeprint, NULL);
scm_make_smob_type_mfpe ("big", 0, /* freed in gc */
NULL, NULL, scm_bigprint, scm_bigequal);
scm_make_smob_type_mfpe ("real", 0, /* freed in gc */
NULL, NULL, scm_print_real, scm_real_equalp);
scm_make_smob_type_mfpe ("complex", 0, /* freed in gc */
NULL, NULL, scm_print_complex, scm_complex_equalp);
scm_make_smob_type ("allocated", 0);
}
/*
Local Variables:
c-file-style: "gnu"
End:
*/
|