1 /* -*- mode: C; c-file-style: "gnu" -*- */
2 /* dbus-gmain.c GLib main loop integration
4 * Copyright (C) 2002, 2003 CodeFactory AB
6 * Licensed under the Academic Free License version 1.2
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include "dbus-glib.h"
28 * @defgroup DBusGLib GLib bindings
30 * @brief API for using D-BUS with GLib
32 * Convenience functions are provided for using D-BUS
33 * with the GLib library (see http://www.gtk.org for GLib
39 * @defgroup DBusGLibInternals GLib bindings implementation details
40 * @ingroup DBusInternals
41 * @brief Implementation details of GLib bindings
46 /** @typedef DBusGSource
47 * A GSource representing a #DBusConnection or #DBusServer
49 typedef struct DBusGSource DBusGSource;
53 GSource source; /**< the parent GSource */
55 GList *poll_fds; /**< descriptors we're watching */
56 GHashTable *watches; /**< hash of DBusWatch objects */
58 GMainContext *context; /**< the GMainContext to use, NULL for default */
60 void *connection_or_server; /**< DBusConnection or DBusServer */
63 static dbus_int32_t connection_slot = -1;
64 static dbus_int32_t server_slot = -1;
66 static gboolean gsource_connection_prepare (GSource *source,
68 static gboolean gsource_connection_check (GSource *source);
69 static gboolean gsource_connection_dispatch (GSource *source,
72 static gboolean gsource_server_prepare (GSource *source,
74 static gboolean gsource_server_check (GSource *source);
75 static gboolean gsource_server_dispatch (GSource *source,
79 static GSourceFuncs dbus_connection_funcs = {
80 gsource_connection_prepare,
81 gsource_connection_check,
82 gsource_connection_dispatch,
86 static GSourceFuncs dbus_server_funcs = {
87 gsource_server_prepare,
89 gsource_server_dispatch,
94 gsource_connection_prepare (GSource *source,
97 DBusConnection *connection = ((DBusGSource *)source)->connection_or_server;
101 return (dbus_connection_get_dispatch_status (connection) == DBUS_DISPATCH_DATA_REMAINS);
105 gsource_server_prepare (GSource *source,
114 dbus_gsource_check (GSource *source)
116 DBusGSource *dbus_source = (DBusGSource *)source;
119 list = dbus_source->poll_fds;
123 GPollFD *poll_fd = list->data;
125 if (poll_fd->revents != 0)
135 gsource_connection_check (GSource *source)
137 return dbus_gsource_check (source);
141 gsource_server_check (GSource *source)
143 return dbus_gsource_check (source);
147 dbus_gsource_dispatch (GSource *source,
148 GSourceFunc callback,
150 dbus_bool_t is_server)
152 DBusGSource *dbus_source = (DBusGSource *)source;
155 /* We need to traverse a copy of the list, since it can change in
156 dbus_watch_handle(). */
157 copy = g_list_copy (dbus_source->poll_fds);
162 GPollFD *poll_fd = list->data;
164 if (poll_fd->revents != 0)
166 DBusWatch *watch = g_hash_table_lookup (dbus_source->watches, poll_fd);
169 if (poll_fd->revents & G_IO_IN)
170 condition |= DBUS_WATCH_READABLE;
171 if (poll_fd->revents & G_IO_OUT)
172 condition |= DBUS_WATCH_WRITABLE;
173 if (poll_fd->revents & G_IO_ERR)
174 condition |= DBUS_WATCH_ERROR;
175 if (poll_fd->revents & G_IO_HUP)
176 condition |= DBUS_WATCH_HANGUP;
178 dbus_watch_handle (watch, condition);
190 gsource_connection_dispatch (GSource *source,
191 GSourceFunc callback,
194 DBusGSource *dbus_source = (DBusGSource *)source;
195 DBusConnection *connection = dbus_source->connection_or_server;
197 dbus_connection_ref (connection);
199 dbus_gsource_dispatch (source, callback, user_data,
202 /* Dispatch messages */
203 while (dbus_connection_dispatch (connection) == DBUS_DISPATCH_DATA_REMAINS)
206 dbus_connection_unref (connection);
212 gsource_server_dispatch (GSource *source,
213 GSourceFunc callback,
216 DBusGSource *dbus_source = (DBusGSource *)source;
217 DBusServer *server = dbus_source->connection_or_server;
219 dbus_server_ref (server);
221 dbus_gsource_dispatch (source, callback, user_data,
224 dbus_server_unref (server);
230 add_watch (DBusWatch *watch,
234 DBusGSource *dbus_source;
237 if (!dbus_watch_get_enabled (watch))
242 poll_fd = g_new (GPollFD, 1);
243 poll_fd->fd = dbus_watch_get_fd (watch);
245 flags = dbus_watch_get_flags (watch);
246 dbus_watch_set_data (watch, poll_fd, NULL);
248 if (flags & DBUS_WATCH_READABLE)
249 poll_fd->events |= G_IO_IN;
250 if (flags & DBUS_WATCH_WRITABLE)
251 poll_fd->events |= G_IO_OUT;
252 poll_fd->events |= G_IO_ERR | G_IO_HUP;
254 g_source_add_poll ((GSource *)dbus_source, poll_fd);
256 dbus_source->poll_fds = g_list_prepend (dbus_source->poll_fds, poll_fd);
257 g_hash_table_insert (dbus_source->watches, poll_fd, watch);
263 remove_watch (DBusWatch *watch,
266 DBusGSource *dbus_source = data;
269 poll_fd = dbus_watch_get_data (watch);
271 return; /* probably a not-enabled watch that was added */
273 dbus_source->poll_fds = g_list_remove (dbus_source->poll_fds, poll_fd);
274 g_hash_table_remove (dbus_source->watches, poll_fd);
275 g_source_remove_poll ((GSource *)dbus_source, poll_fd);
277 dbus_watch_set_data (watch, NULL, NULL); /* needed due to watch_toggled
278 * breaking add/remove symmetry
285 watch_toggled (DBusWatch *watch,
288 /* Because we just exit on OOM, enable/disable is
289 * no different from add/remove
291 if (dbus_watch_get_enabled (watch))
292 add_watch (watch, data);
294 remove_watch (watch, data);
298 timeout_handler (gpointer data)
300 DBusTimeout *timeout = data;
302 dbus_timeout_handle (timeout);
308 add_timeout (DBusTimeout *timeout,
311 DBusGSource *dbus_source = data;
314 if (!dbus_timeout_get_enabled (timeout))
317 source = g_timeout_source_new (dbus_timeout_get_interval (timeout));
318 g_source_set_callback (source, timeout_handler, timeout, NULL);
319 g_source_attach (source, dbus_source->context);
321 dbus_timeout_set_data (timeout, GUINT_TO_POINTER (g_source_get_id (source)),
328 remove_timeout (DBusTimeout *timeout,
333 timeout_tag = GPOINTER_TO_UINT (dbus_timeout_get_data (timeout));
335 if (timeout_tag != 0) /* if 0, probably timeout was disabled */
336 g_source_remove (timeout_tag);
340 timeout_toggled (DBusTimeout *timeout,
343 /* Because we just exit on OOM, enable/disable is
344 * no different from add/remove
346 if (dbus_timeout_get_enabled (timeout))
347 add_timeout (timeout, data);
349 remove_timeout (timeout, data);
354 free_source (GSource *source)
356 g_source_destroy (source);
360 wakeup_main (void *data)
362 DBusGSource *dbus_source = data;
364 g_main_context_wakeup (dbus_source->context);
368 /** @} */ /* End of GLib bindings internals */
370 /** @addtogroup DBusGLib
375 create_source (void *connection_or_server,
377 GMainContext *context)
380 DBusGSource *dbus_source;
382 source = g_source_new (funcs, sizeof (DBusGSource));
384 dbus_source = (DBusGSource *)source;
385 dbus_source->watches = g_hash_table_new (NULL, NULL);
386 dbus_source->connection_or_server = connection_or_server;
387 dbus_source->context = context;
393 * Sets the watch and timeout functions of a #DBusConnection
394 * to integrate the connection with the GLib main loop.
395 * Pass in #NULL for the #GMainContext unless you're
396 * doing something specialized.
398 * @param connection the connection
399 * @param context the #GMainContext or #NULL for default context
402 dbus_connection_setup_with_g_main (DBusConnection *connection,
403 GMainContext *context)
407 source = create_source (connection, &dbus_connection_funcs, context);
409 if (!dbus_connection_set_watch_functions (connection,
416 if (!dbus_connection_set_timeout_functions (connection,
423 dbus_connection_set_wakeup_main_function (connection,
427 g_source_attach (source, context);
429 /* FIXME we never free the slot, so its refcount just keeps growing,
430 * which is kind of broken.
432 dbus_connection_allocate_data_slot (&connection_slot);
433 if (connection_slot < 0)
436 if (!dbus_connection_set_data (connection, connection_slot, source,
437 (DBusFreeFunction)free_source))
443 g_error ("Not enough memory to set up DBusConnection for use with GLib");
447 * Sets the watch and timeout functions of a #DBusServer
448 * to integrate the server with the GLib main loop.
449 * In most cases the context argument should be #NULL.
451 * @param server the server
452 * @param context the #GMainContext or #NULL for default
455 dbus_server_setup_with_g_main (DBusServer *server,
456 GMainContext *context)
460 source = create_source (server, &dbus_server_funcs, context);
462 dbus_server_set_watch_functions (server,
468 dbus_server_set_timeout_functions (server,
474 g_source_attach (source, context);
476 /* FIXME we never free the slot, so its refcount just keeps growing,
477 * which is kind of broken.
479 dbus_server_allocate_data_slot (&server_slot);
483 if (!dbus_server_set_data (server, server_slot, source,
484 (DBusFreeFunction)free_source))
490 g_error ("Not enough memory to set up DBusServer for use with GLib");
493 /** @} */ /* end of public API */