/* dynl-dl.c - dynamic linking for dlopen/dlsym
*
- * Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+ * 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
*
* 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, 675 Mass Ave, Cambridge, MA 02139, USA.
+ * 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.
*
* 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.
- */
+ * 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 "_scm.h"
-#include "genio.h"
-#include "smob.h"
-
#include <dlfcn.h>
-#define SHL(obj) ((void*)SCM_CDR(obj))
-
#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 scm_sizet frshl SCM_P ((SCM ptr));
-
-static scm_sizet
-frshl (ptr)
- SCM ptr;
-{
-#if 0
- /* Should freeing a shl close and possibly unmap the object file it */
- /* refers to? */
- if (SHL(ptr))
- dlclose (SHL(ptr));
+#ifndef RTLD_GLOBAL /* Some systems have no such flag. */
+# define RTLD_GLOBAL 0
#endif
- return 0;
-}
-
-static int prinshl SCM_P ((SCM exp, SCM port, scm_print_state *pstate));
-static int
-prinshl (exp, port, pstate)
- SCM exp;
- SCM port;
- scm_print_state *pstate;
+static void *
+sysdep_dynl_link (fname, flags, subr)
+ const char *fname;
+ int flags;
+ const char *subr;
{
- scm_gen_puts (scm_regular_string, "#<dynamic-linked ", port);
- scm_intprint (SCM_CDR (exp), 16, port);
- scm_gen_putc ('>', port);
- return 1;
+ void *handle = dlopen (fname, (DLOPEN_MODE
+ | ((flags & DYNL_GLOBAL)? RTLD_GLOBAL : 0)));
+ if (NULL == handle)
+ {
+ SCM_ALLOW_INTS;
+ scm_misc_error (subr, (char *)dlerror (), SCM_EOL);
+ }
+ return handle;
}
-int scm_tc16_shl;
-static scm_smobfuns shlsmob = { scm_mark0, frshl, prinshl };
-
-SCM_PROC (s_dynamic_link, "dynamic-link", 1, 0, 0, scm_dynamic_link);
-
-SCM
-scm_dynamic_link (fname)
- SCM fname;
+static void
+sysdep_dynl_unlink (handle, subr)
+ void *handle;
+ const char *subr;
{
- SCM z;
- void *handle;
-
- /* if FALSEP(fname) return fname; XXX - ? */
-
- fname = scm_coerce_rostring (fname, s_dynamic_link, SCM_ARG1);
-
- SCM_DEFER_INTS;
- handle = dlopen (SCM_CHARS (fname), DLOPEN_MODE);
- if (NULL == handle)
- scm_misc_error (s_dynamic_link, (char *)dlerror (), SCM_EOL);
- SCM_NEWCELL (z);
- SCM_SETCHARS (z, handle);
- SCM_SETCAR (z, scm_tc16_shl);
- SCM_ALLOW_INTS;
-
- return z;
+ if (dlclose (handle))
+ {
+ SCM_ALLOW_INTS;
+ scm_misc_error (subr, (char *)dlerror (), SCM_EOL);
+ }
}
-
-static void *get_func SCM_P ((void *handle, char *func, char *subr));
-
+
static void *
-get_func (handle, func, subr)
+sysdep_dynl_func (symb, handle, subr)
+ const char *symb;
void *handle;
- char *func;
- char *subr;
+ const 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
- fptr = dlsym (handle, func);
err = (char *)dlerror ();
if (!fptr)
+ {
+ SCM_ALLOW_INTS;
scm_misc_error (subr, err? err : "symbol has NULL address", SCM_EOL);
+ }
return fptr;
}
-SCM_PROC (s_dynamic_call, "dynamic-call", 2, 0, 0, scm_dynamic_call);
-
-SCM
-scm_dynamic_call (symb, shl)
- SCM symb, shl;
-{
- void (*func) SCM_P ((void)) = 0;
-
- symb = scm_coerce_rostring (symb, s_dynamic_call, SCM_ARG1);
- SCM_ASSERT (SCM_NIMP (shl) && SCM_CAR (shl) == scm_tc16_shl, shl,
- SCM_ARG2, s_dynamic_call);
-
- SCM_DEFER_INTS;
- func = get_func (SHL(shl), SCM_CHARS (symb), s_dynamic_call);
- SCM_ALLOW_INTS;
-
- (*func) ();
-
- return SCM_BOOL_T;
-}
-
-SCM_PROC (s_dynamic_args_call, "dynamic-args-call", 3, 0, 0, scm_dynamic_args_call);
-
-SCM
-scm_dynamic_args_call (symb, shl, args)
- SCM symb, shl, args;
-{
- int i, argc;
- char **argv;
- int (*func) SCM_P ((int argc, char **argv)) = 0;
-
- symb = scm_coerce_rostring (symb, s_dynamic_args_call, SCM_ARG1);
- SCM_ASSERT (SCM_NIMP (shl) && SCM_CAR (shl) == scm_tc16_shl, shl,
- SCM_ARG2, s_dynamic_args_call);
-
- SCM_DEFER_INTS;
- func = get_func (SHL(shl), SCM_CHARS (symb), s_dynamic_args_call);
- argv = scm_make_argv_from_stringlist (args, &argc, s_dynamic_args_call,
- SCM_ARG3);
- SCM_ALLOW_INTS;
-
- i = (*func) (argc, argv);
-
- SCM_DEFER_INTS;
- scm_must_free_argv(argv);
- SCM_ALLOW_INTS;
- return SCM_MAKINUM(0L+i);
-}
-
-SCM_PROC (s_dynamic_unlink, "dynamic-unlink", 1, 0, 0, scm_dynamic_unlink);
-
-SCM
-scm_dynamic_unlink (shl)
- SCM shl;
-{
- int status;
-
- SCM_ASSERT (SCM_NIMP (shl) && SCM_CAR (shl) == scm_tc16_shl, shl,
- SCM_ARG1, s_dynamic_unlink);
-
- SCM_DEFER_INTS;
- status = dlclose (SHL(shl));
- SCM_SETCHARS (shl, NULL);
- SCM_ALLOW_INTS;
-
- if (status)
- scm_misc_error (s_dynamic_unlink, (char *)dlerror (), SCM_EOL);
- return SCM_BOOL_T;
-}
-
-void
-scm_init_dynamic_linking ()
+static void
+sysdep_dynl_init ()
{
- scm_tc16_shl = scm_newsmob (&shlsmob);
-#include "dynl.x"
}
HCoop / bpt / guile.git / blobdiff