Removed. Split into glibtop-backend.h and glibtop-backend-info.h.
2000-11-26 Martin Baulig <martin@home-of-linux.org> * include/glibtop/backend.h: Removed. Split into glibtop-backend.h and glibtop-backend-info.h. * include/glibtop/glibtop-backend.h: New file. Switched glibtop_backend to a GObject. * include/glibtop/glibtop-backend-info.h: New file. * lib/backend.c, lib/init-backends.c, lib/open-backend.c: Removed. * lib/glibtop-backend.c: New file. * lib/glibtop-backend-info.c: New file.
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Martin Baulig
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Martin Baulig
Martin Baulig
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dfd678599f
commit
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232
lib/glibtop-backend.c
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232
lib/glibtop-backend.c
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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/* $Id$ */
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/* Copyright (C) 1998-99 Martin Baulig
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This file is part of LibGTop 2.0.
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Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
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LibGTop is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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LibGTop is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with LibGTop; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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*/
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#include <glibtop.h>
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#include <gobject/gsignal.h>
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#include <gobject/gvaluetypes.h>
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#include <glibtop/glibtop-backend.h>
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#include <glibtop/glibtop-backend-info.h>
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static void glibtop_backend_class_init (glibtop_backend_class *klass);
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static void glibtop_backend_init (glibtop_backend *backend);
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static void glibtop_backend_finalize (GObject *object);
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static gpointer parent_class = NULL;
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/* Internal data */
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struct _glibtop_backend_private
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{
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const glibtop_backend_info *info;
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glibtop_server *server;
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glibtop_backend_module *module;
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};
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GType
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glibtop_backend_get_type (void)
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{
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static GType glibtop_backend_type = 0;
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if (!glibtop_backend_type) {
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static const GTypeInfo glibtop_backend_info = {
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sizeof (glibtop_backend_class),
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NULL, /* base_class_init */
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NULL, /* base_class_finalize */
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(GClassInitFunc) glibtop_backend_class_init,
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NULL, /* class_finalize */
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NULL, /* class_data */
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sizeof (glibtop_backend),
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16, /* n_preallocs */
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(GInstanceInitFunc) glibtop_backend_init,
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};
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glibtop_backend_type = g_type_register_static
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(G_TYPE_OBJECT, "glibtop_backend", &glibtop_backend_info, 0);
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}
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return glibtop_backend_type;
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}
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static void
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glibtop_backend_class_init (glibtop_backend_class *class)
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{
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GObjectClass *gobject_class;
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gobject_class = (GObjectClass *) class;
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parent_class = g_type_class_ref (G_TYPE_OBJECT);
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gobject_class->finalize = glibtop_backend_finalize;
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}
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static void
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glibtop_backend_init (glibtop_backend *glibtop)
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{
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glibtop_backend_private *priv;
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priv = g_new0 (glibtop_backend_private, 1);
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glibtop->_priv = priv;
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}
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static void
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glibtop_backend_finalize (GObject *object)
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{
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glibtop_backend *glibtop;
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glibtop_backend_private *priv = NULL;
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glibtop = GLIBTOP_BACKEND (object);
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priv = glibtop->_priv;
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g_free (priv);
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if (G_OBJECT_CLASS (parent_class)->finalize)
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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unload_module (gpointer data, gpointer user_data)
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{
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g_module_close (data);
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}
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static int
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load_extra_libs (glibtop_backend_entry *entry, GError **error)
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{
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GSList *list;
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GSList *loaded_here = NULL;
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for (list = entry->extra_libs; list; list = list->next) {
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const gchar *filename = list->data;
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GModule *module;
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module = g_module_open (filename, G_MODULE_BIND_LAZY);
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if (!module) {
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g_set_error (error, GLIBTOP_ERROR, GLIBTOP_ERROR_NO_SUCH_BACKEND,
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"Cannot open extra shared library `%s' "
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"for backend `%s' (%s)", filename, entry->name,
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g_module_error ());
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g_slist_foreach (loaded_here, unload_module, NULL);
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return -GLIBTOP_ERROR_NO_SUCH_BACKEND;
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}
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loaded_here = g_slist_prepend (loaded_here, module);
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}
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entry->_priv->extra_modules = g_slist_concat
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(loaded_here, entry->_priv->extra_modules);
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return 0;
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}
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glibtop_backend *
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glibtop_backend_open (const char *backend_name, u_int64_t features,
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const char **backend_args, GError **error)
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{
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const glibtop_backend_info *info;
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glibtop_backend_entry *entry;
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glibtop_backend *backend;
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glibtop_init_backends ();
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entry = glibtop_backend_by_name (backend_name);
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if (!entry) {
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g_set_error (error, GLIBTOP_ERROR, GLIBTOP_ERROR_NO_SUCH_BACKEND,
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"No backend with this name");
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return NULL;
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}
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if (!entry->_priv) {
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entry->_priv = g_new0 (glibtop_backend_module, 1);
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if (entry->extra_libs) {
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int retval;
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retval = load_extra_libs (entry, error);
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if (retval < 0)
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return NULL;
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}
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entry->_priv->module = g_module_open (entry->shlib_name,
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G_MODULE_BIND_LAZY);
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if (!entry->_priv->module) {
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g_set_error (error, GLIBTOP_ERROR, GLIBTOP_ERROR_NO_SUCH_BACKEND,
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"Cannot open shared library `%s' "
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"for backend `%s' (%s)", entry->shlib_name,
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entry->name, g_module_error ());
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return NULL;
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}
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if (!g_module_symbol (entry->_priv->module,
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"LibGTopBackendInfo",
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(gpointer*) &entry->info)) {
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g_set_error (error, GLIBTOP_ERROR, GLIBTOP_ERROR_NO_SUCH_BACKEND,
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"Library `%s' is not a valid "
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"LibGTop Backend library (start symbol not found)",
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entry->shlib_name);
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g_module_close (entry->_priv->module);
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g_free (entry->_priv);
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entry->_priv = NULL;
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return NULL;
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}
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}
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info = entry->info;
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if (!info) {
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g_set_error (error, GLIBTOP_ERROR, GLIBTOP_ERROR_NO_SUCH_BACKEND,
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"Can't get backend info");
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return NULL;
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}
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backend = g_object_new (GLIBTOP_TYPE_BACKEND, NULL);
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backend->_priv->module = entry->_priv;
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backend->_priv->info = info;
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backend->_priv->server = glibtop_server_new ();
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if (info->open) {
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int retval;
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retval = info->open (backend->_priv->server, backend, features,
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backend_args);
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if (retval) {
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g_set_error (error, GLIBTOP_ERROR, GLIBTOP_ERROR_NO_SUCH_BACKEND,
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"Backend open function return error condition");
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g_object_unref (G_OBJECT (backend));
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return NULL;
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}
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}
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entry->_priv->refcount++;
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return backend;
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}
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