libguile/mallocs.c

   1 /* classes: src_files */
   2
   3 /*      Copyright (C) 1995, 1997 Free Software Foundation, Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2, or (at your option)
   8  * any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this software; see the file COPYING.  If not, write to
  17  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  18  * Boston, MA 02111-1307 USA */
  19
  20 \f
  21
  22 #include <stdio.h>
  23 #include "_scm.h"
  24 #include "genio.h"
  25 #include "smob.h"
  26
  27 #include "mallocs.h"
  28
  29 #ifdef HAVE_MALLOC_H
  30 #include <malloc.h>
  31 #endif
  32 #ifdef HAVE_UNISTD_H
  33 #include <unistd.h>
  34 #endif
  35
  36
  37 \f
  38
  39
  40
  41 static scm_sizet fmalloc SCM_P ((SCM ptr));
  42
  43 static scm_sizet
  44 fmalloc(ptr)
  45      SCM ptr;
  46 {
  47   if (SCM_MALLOCDATA (ptr))
  48     free (SCM_MALLOCDATA (ptr));
  49   return 0;
  50 }
  51
  52
  53 static int prinmalloc SCM_P ((SCM exp, SCM port, scm_print_state *pstate));
  54
  55 static int
  56 prinmalloc (exp, port, pstate)
  57      SCM exp;
  58      SCM port;
  59      scm_print_state *pstate;
  60 {
  61   scm_puts("#<malloc ", port);
  62   scm_intprint(SCM_CDR(exp), 16, port);
  63   scm_putc('>', port);
  64   return 1;
  65 }
  66
  67 \f
  68 int scm_tc16_malloc;
  69 static scm_smobfuns mallocsmob = {scm_mark0, fmalloc, prinmalloc, 0};
  70
  71 \f
  72
  73
  74 SCM
  75 scm_malloc_obj (n)
  76      scm_sizet n;
  77 {
  78   SCM answer;
  79   SCM mem;
  80
  81   SCM_NEWCELL (answer);
  82   SCM_DEFER_INTS;
  83   mem = (n
  84          ? (SCM)malloc (n)
  85          : 0);
  86   if (n && !mem)
  87     {
  88       SCM_ALLOW_INTS;
  89       return SCM_BOOL_F;
  90     }
  91   SCM_SETCDR (answer, mem);
  92   SCM_SETCAR (answer, scm_tc16_malloc);
  93   SCM_ALLOW_INTS;
  94   return answer;
  95 }
  96
  97
  98 \f
  99
 100 void
 101 scm_init_mallocs ()
 102 {
 103   scm_tc16_malloc = scm_newsmob (&mallocsmob);
 104 }
 105