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/* dynl-dl.c - dynamic linking for dlopen/dlsym
*
* Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998 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. */
/* "dynl.c" dynamically link&load object files.
Author: Aubrey Jaffer
Modified for libguile by Marius Vollmer */
#include <dlfcn.h>
#ifdef RTLD_LAZY /* Solaris 2. */
# define DLOPEN_MODE RTLD_LAZY
#else
# define DLOPEN_MODE 1 /* Thats what it says in the man page. */
#endif
static void *
sysdep_dynl_link (fname, subr)
char *fname;
char *subr;
{
void *handle = dlopen (fname, DLOPEN_MODE);
if (NULL == handle)
{
SCM_ALLOW_INTS;
scm_misc_error (subr, (char *)dlerror (), SCM_EOL);
}
return handle;
}
static void
sysdep_dynl_unlink (handle, subr)
void *handle;
char *subr;
{
if (dlclose (handle))
{
SCM_ALLOW_INTS;
scm_misc_error (subr, (char *)dlerror (), SCM_EOL);
}
}
static void *
sysdep_dynl_func (symb, handle, subr)
char *symb;
void *handle;
char *subr;
{
void *fptr;
char *err;
#if defined(USCORE) && !defined(DLSYM_ADDS_USCORE)
char *usymb;
#endif
#if defined(USCORE) && !defined(DLSYM_ADDS_USCORE)
usymb = (char *) malloc (strlen (symb) + 2);
*usymb = '_';
strcpy (usymb + 1, symb);
fptr = dlsym (handle, usymb);
free (usymb);
#else
fptr = dlsym (handle, symb);
#endif
err = (char *)dlerror ();
if (!fptr)
{
SCM_ALLOW_INTS;
scm_misc_error (subr, err? err : "symbol has NULL address", SCM_EOL);
}
return fptr;
}
static void
sysdep_dynl_init ()
{
}
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