libguile/dynl-shl.c

   1 /* dynl-shl.c - dynamic linking with shl_load (HP-UX)
   2  *
   3  * Copyright (C) 1990-1997 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  * As a special exception, the Free Software Foundation gives permission
  21  * for additional uses of the text contained in its release of GUILE.
  22  *
  23  * The exception is that, if you link the GUILE library with other files
  24  * to produce an executable, this does not by itself cause the
  25  * resulting executable to be covered by the GNU General Public License.
  26  * Your use of that executable is in no way restricted on account of
  27  * linking the GUILE library code into it.
  28  *
  29  * This exception does not however invalidate any other reasons why
  30  * the executable file might be covered by the GNU General Public License.
  31  *
  32  * This exception applies only to the code released by the
  33  * Free Software Foundation under the name GUILE.  If you copy
  34  * code from other Free Software Foundation releases into a copy of
  35  * GUILE, as the General Public License permits, the exception does
  36  * not apply to the code that you add in this way.  To avoid misleading
  37  * anyone as to the status of such modified files, you must delete
  38  * this exception notice from them.
  39  *
  40  * If you write modifications of your own for GUILE, it is your choice
  41  * whether to permit this exception to apply to your modifications.
  42  * If you do not wish that, delete this exception notice.  */
  43
  44 /* "dynl.c" dynamically link&load object files.
  45    Author: Aubrey Jaffer
  46    Modified for libguile by Marius Vollmer */
  47
  48 #include "dl.h"
  49 #include <stdio.h>
  50 #include <string.h>
  51
  52 static void *
  53 sysdep_dynl_link (fname, flags, subr)
  54      const char *fname;
  55      int flags;
  56      const char *subr;
  57 {
  58     shl_t shl;
  59
  60     /* Probably too much BIND_* flags */
  61     shl = shl_load (fname, BIND_IMMEDIATE || BIND_FIRST ||
  62                     BIND_TOGETHER ||
  63                     BIND_VERBOSE || DYNAMIC_PATH, 0L);
  64     if (NULL==shl)
  65       {
  66         SCM_ALLOW_INTS;
  67         scm_misc_error (subr, "dynamic linking failed", SCM_EOL);
  68       }
  69     return shl;
  70 }
  71
  72 static void
  73 sysdep_dynl_unlink (handle, subr)
  74      void *handle;
  75      const char *subr;
  76 {
  77   if (shl_unload ((shl_t) handle))
  78     {
  79       SCM_ALLOW_INTS;
  80       scm_misc_error (subr, "dynamic unlinking failed", SCM_EOL);
  81     }
  82 }
  83
  84 static void *
  85 sysdep_dynl_func (symb, handle, subr)
  86      const char *symb;
  87      void *handle;
  88      const char *subr;
  89 {
  90     int status, i;
  91     struct shl_symbol *sym;
  92
  93     status = shl_getsymbols((shl_t) handle, TYPE_PROCEDURE,
  94              EXPORT_SYMBOLS, malloc, &sym);
  95
  96     for (i=0; i<status; ++i) {
  97       if (strcmp(symb, sym[i].name) == 0) return sym[i].value;
  98     }
  99
 100     SCM_ALLOW_INTS;
 101     scm_misc_error (subr, "undefined function",
 102                     scm_cons (scm_makfrom0str (symb), SCM_EOL));
 103 }
 104
 105 static void
 106 sysdep_dynl_init ()
 107 {
 108 }