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https://git.savannah.gnu.org/git/guile.git
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96599e6aaf
are now defined even when dynamic linking is not available for the host system. Some of their functionality can be done without dynamic linking; when it's really needed, they throw errors.
103 lines
3.1 KiB
C
103 lines
3.1 KiB
C
/* dynl-dl.c - dynamic linking for dlopen/dlsym
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*
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* Copyright (C) 1990-1997 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice.
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*/
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/* "dynl.c" dynamically link&load object files.
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Author: Aubrey Jaffer
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Modified for libguile by Marius Vollmer */
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#include <dlfcn.h>
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#ifdef RTLD_LAZY /* Solaris 2. */
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# define DLOPEN_MODE RTLD_LAZY
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#else
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# define DLOPEN_MODE 1 /* Thats what it says in the man page. */
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#endif
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static void *
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sysdep_dynl_link (fname, subr)
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char *fname;
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char *subr;
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{
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void *handle = dlopen (fname, DLOPEN_MODE);
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if (NULL == handle)
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scm_misc_error (subr, (char *)dlerror (), SCM_EOL);
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return handle;
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}
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static void
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sysdep_dynl_unlink (handle, subr)
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void *handle;
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char *subr;
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{
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int status;
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SCM_DEFER_INTS;
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status = dlclose (handle);
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SCM_ALLOW_INTS;
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if(status)
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scm_misc_error (subr, (char *)dlerror (), SCM_EOL);
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}
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static void *
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sysdep_dynl_func (symb, handle, subr)
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char *symb;
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void *handle;
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char *subr;
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{
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void *fptr;
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char *err;
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SCM_DEFER_INTS;
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fptr = dlsym (handle, symb);
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err = (char *)dlerror ();
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SCM_ALLOW_INTS;
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if (!fptr)
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scm_misc_error (subr, err? err : "symbol has NULL address", SCM_EOL);
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return fptr;
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}
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static void
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sysdep_dynl_init ()
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{
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}
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