--- /dev/null
+/* loader-load_add_on.c -- dynamic linking for BeOS
+
+ Copyright (C) 1998, 1999, 2000, 2004, 2006,
+ 2007, 2008 Free Software Foundation, Inc.
+ Written by Thomas Tanner, 1998
+
+ NOTE: The canonical source of this file is maintained with the
+ GNU Libtool package. Report bugs to bug-libtool@gnu.org.
+
+GNU Libltdl is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+As a special exception to the GNU Lesser General Public License,
+if you distribute this file as part of a program or library that
+is built using GNU Libtool, you may include this file under the
+same distribution terms that you use for the rest of that program.
+
+GNU Libltdl 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with GNU Libltdl; see the file COPYING.LIB. If not, a
+copy can be downloaded from http://www.gnu.org/licenses/lgpl.html,
+or obtained by writing to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+*/
+
+#include "lt__private.h"
+#include "lt_dlloader.h"
+
+/* Use the preprocessor to rename non-static symbols to avoid namespace
+ collisions when the loader code is statically linked into libltdl.
+ Use the "<module_name>_LTX_" prefix so that the symbol addresses can
+ be fetched from the preloaded symbol list by lt_dlsym(): */
+#define get_vtable load_add_on_LTX_get_vtable
+
+LT_BEGIN_C_DECLS
+LT_SCOPE lt_dlvtable *get_vtable (lt_user_data loader_data);
+LT_END_C_DECLS
+
+
+/* Boilerplate code to set up the vtable for hooking this loader into
+ libltdl's loader list: */
+static int vl_exit (lt_user_data loader_data);
+static lt_module vm_open (lt_user_data loader_data, const char *filename,
+ lt_dladvise advise);
+static int vm_close (lt_user_data loader_data, lt_module module);
+static void * vm_sym (lt_user_data loader_data, lt_module module,
+ const char *symbolname);
+
+static lt_dlvtable *vtable = 0;
+
+/* Return the vtable for this loader, only the name and sym_prefix
+ attributes (plus the virtual function implementations, obviously)
+ change between loaders. */
+lt_dlvtable *
+get_vtable (lt_user_data loader_data)
+{
+ if (!vtable)
+ {
+ vtable = lt__zalloc (sizeof *vtable);
+ }
+
+ if (vtable && !vtable->name)
+ {
+ vtable->name = "lt_load_add_on";
+ vtable->module_open = vm_open;
+ vtable->module_close = vm_close;
+ vtable->find_sym = vm_sym;
+ vtable->dlloader_exit = vl_exit;
+ vtable->dlloader_data = loader_data;
+ vtable->priority = LT_DLLOADER_APPEND;
+ }
+
+ if (vtable && (vtable->dlloader_data != loader_data))
+ {
+ LT__SETERROR (INIT_LOADER);
+ return 0;
+ }
+
+ return vtable;
+}
+
+
+
+/* --- IMPLEMENTATION --- */
+
+
+#include <kernel/image.h>
+
+/* A function called through the vtable when this loader is no
+ longer needed by the application. */
+static int
+vl_exit (lt_user_data LT__UNUSED loader_data)
+{
+ vtable = NULL;
+ return 0;
+}
+
+/* A function called through the vtable to open a module with this
+ loader. Returns an opaque representation of the newly opened
+ module for processing with this loader's other vtable functions. */
+static lt_module
+vm_open (lt_user_data LT__UNUSED loader_data, const char *filename,
+ lt_dladvise LT__UNUSED advise)
+{
+ image_id image = 0;
+
+ if (filename)
+ {
+ image = load_add_on (filename);
+ }
+ else
+ {
+ image_info info;
+ int32 cookie = 0;
+ if (get_next_image_info (0, &cookie, &info) == B_OK)
+ image = load_add_on (info.name);
+ }
+
+ if (image <= 0)
+ {
+ LT__SETERROR (CANNOT_OPEN);
+ image = 0;
+ }
+
+ return (lt_module) image;
+}
+
+
+/* A function called through the vtable when a particular module
+ should be unloaded. */
+static int
+vm_close (lt_user_data LT__UNUSED loader_data, lt_module module)
+{
+ int errors = 0;
+
+ if (unload_add_on ((image_id) module) != B_OK)
+ {
+ LT__SETERROR (CANNOT_CLOSE);
+ ++errors;
+ }
+
+ return errors;
+}
+
+
+/* A function called through the vtable to get the address of
+ a symbol loaded from a particular module. */
+static void *
+vm_sym (lt_user_data LT__UNUSED loader_data, lt_module module, const char *name)
+{
+ void *address = 0;
+ image_id image = (image_id) module;
+
+ if (get_image_symbol (image, name, B_SYMBOL_TYPE_ANY, address) != B_OK)
+ {
+ LT__SETERROR (SYMBOL_NOT_FOUND);
+ address = 0;
+ }
+
+ return address;
+}
HCoop / hcoop / debian / courier-authlib.git / blobdiff