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
25 #include "dbus-glib.h"
26 #include "dbus-gtest.h"
29 * @defgroup DBusGLib GLib bindings
31 * @brief API for using D-BUS with GLib
33 * Convenience functions are provided for using D-BUS
34 * with the GLib library (see http://www.gtk.org for GLib
40 * @defgroup DBusGLibInternals GLib bindings implementation details
41 * @ingroup DBusInternals
42 * @brief Implementation details of GLib bindings
47 /** @typedef DBusGSource
48 * A GSource representing a #DBusConnection or #DBusServer
50 typedef struct DBusGSource DBusGSource;
53 * A GSource subclass for a DBusConnection.
57 GSource source; /**< the parent GSource */
59 GList *poll_fds; /**< descriptors we're watching */
60 GHashTable *watches; /**< hash of DBusWatch objects */
62 GMainContext *context; /**< the GMainContext to use, NULL for default */
64 void *connection_or_server; /**< DBusConnection or DBusServer */
67 static dbus_int32_t connection_slot = -1;
68 static dbus_int32_t server_slot = -1;
70 static gboolean gsource_connection_prepare (GSource *source,
72 static gboolean gsource_connection_check (GSource *source);
73 static gboolean gsource_connection_dispatch (GSource *source,
76 static gboolean gsource_server_prepare (GSource *source,
78 static gboolean gsource_server_check (GSource *source);
79 static gboolean gsource_server_dispatch (GSource *source,
83 static GSourceFuncs dbus_connection_funcs = {
84 gsource_connection_prepare,
85 gsource_connection_check,
86 gsource_connection_dispatch,
90 static GSourceFuncs dbus_server_funcs = {
91 gsource_server_prepare,
93 gsource_server_dispatch,
98 gsource_connection_prepare (GSource *source,
101 DBusConnection *connection = ((DBusGSource *)source)->connection_or_server;
105 return (dbus_connection_get_dispatch_status (connection) == DBUS_DISPATCH_DATA_REMAINS);
109 gsource_server_prepare (GSource *source,
118 dbus_gsource_check (GSource *source)
120 DBusGSource *dbus_source = (DBusGSource *)source;
123 list = dbus_source->poll_fds;
127 GPollFD *poll_fd = list->data;
129 if (poll_fd->revents != 0)
139 gsource_connection_check (GSource *source)
141 return dbus_gsource_check (source);
145 gsource_server_check (GSource *source)
147 return dbus_gsource_check (source);
151 dbus_gsource_dispatch (GSource *source,
152 GSourceFunc callback,
154 dbus_bool_t is_server)
156 DBusGSource *dbus_source = (DBusGSource *)source;
159 /* We need to traverse a copy of the list, since it can change in
160 dbus_watch_handle(). */
161 copy = g_list_copy (dbus_source->poll_fds);
166 GPollFD *poll_fd = list->data;
168 if (poll_fd->revents != 0)
170 DBusWatch *watch = g_hash_table_lookup (dbus_source->watches, poll_fd);
173 if (poll_fd->revents & G_IO_IN)
174 condition |= DBUS_WATCH_READABLE;
175 if (poll_fd->revents & G_IO_OUT)
176 condition |= DBUS_WATCH_WRITABLE;
177 if (poll_fd->revents & G_IO_ERR)
178 condition |= DBUS_WATCH_ERROR;
179 if (poll_fd->revents & G_IO_HUP)
180 condition |= DBUS_WATCH_HANGUP;
182 dbus_watch_handle (watch, condition);
194 gsource_connection_dispatch (GSource *source,
195 GSourceFunc callback,
198 DBusGSource *dbus_source = (DBusGSource *)source;
199 DBusConnection *connection = dbus_source->connection_or_server;
201 dbus_connection_ref (connection);
203 dbus_gsource_dispatch (source, callback, user_data,
206 /* Dispatch messages */
207 while (dbus_connection_dispatch (connection) == DBUS_DISPATCH_DATA_REMAINS)
210 dbus_connection_unref (connection);
216 gsource_server_dispatch (GSource *source,
217 GSourceFunc callback,
220 DBusGSource *dbus_source = (DBusGSource *)source;
221 DBusServer *server = dbus_source->connection_or_server;
223 dbus_server_ref (server);
225 dbus_gsource_dispatch (source, callback, user_data,
228 dbus_server_unref (server);
234 add_watch (DBusWatch *watch,
238 DBusGSource *dbus_source;
241 if (!dbus_watch_get_enabled (watch))
246 poll_fd = g_new (GPollFD, 1);
247 poll_fd->fd = dbus_watch_get_fd (watch);
249 flags = dbus_watch_get_flags (watch);
250 dbus_watch_set_data (watch, poll_fd, NULL);
252 if (flags & DBUS_WATCH_READABLE)
253 poll_fd->events |= G_IO_IN;
254 if (flags & DBUS_WATCH_WRITABLE)
255 poll_fd->events |= G_IO_OUT;
256 poll_fd->events |= G_IO_ERR | G_IO_HUP;
258 g_source_add_poll ((GSource *)dbus_source, poll_fd);
260 dbus_source->poll_fds = g_list_prepend (dbus_source->poll_fds, poll_fd);
261 g_hash_table_insert (dbus_source->watches, poll_fd, watch);
267 remove_watch (DBusWatch *watch,
270 DBusGSource *dbus_source = data;
273 poll_fd = dbus_watch_get_data (watch);
275 return; /* probably a not-enabled watch that was added */
277 dbus_source->poll_fds = g_list_remove (dbus_source->poll_fds, poll_fd);
278 g_hash_table_remove (dbus_source->watches, poll_fd);
279 g_source_remove_poll ((GSource *)dbus_source, poll_fd);
281 dbus_watch_set_data (watch, NULL, NULL); /* needed due to watch_toggled
282 * breaking add/remove symmetry
289 watch_toggled (DBusWatch *watch,
292 /* Because we just exit on OOM, enable/disable is
293 * no different from add/remove
295 if (dbus_watch_get_enabled (watch))
296 add_watch (watch, data);
298 remove_watch (watch, data);
302 timeout_handler (gpointer data)
304 DBusTimeout *timeout = data;
306 dbus_timeout_handle (timeout);
312 add_timeout (DBusTimeout *timeout,
315 DBusGSource *dbus_source = data;
318 if (!dbus_timeout_get_enabled (timeout))
321 source = g_timeout_source_new (dbus_timeout_get_interval (timeout));
322 g_source_set_callback (source, timeout_handler, timeout, NULL);
323 g_source_attach (source, dbus_source->context);
325 dbus_timeout_set_data (timeout, GUINT_TO_POINTER (g_source_get_id (source)),
332 remove_timeout (DBusTimeout *timeout,
337 timeout_tag = GPOINTER_TO_UINT (dbus_timeout_get_data (timeout));
339 if (timeout_tag != 0) /* if 0, probably timeout was disabled */
340 g_source_remove (timeout_tag);
344 timeout_toggled (DBusTimeout *timeout,
347 /* Because we just exit on OOM, enable/disable is
348 * no different from add/remove
350 if (dbus_timeout_get_enabled (timeout))
351 add_timeout (timeout, data);
353 remove_timeout (timeout, data);
358 free_source (GSource *source)
360 g_source_destroy (source);
364 wakeup_main (void *data)
366 DBusGSource *dbus_source = data;
368 g_main_context_wakeup (dbus_source->context);
372 /** @} */ /* End of GLib bindings internals */
374 /** @addtogroup DBusGLib
379 create_source (void *connection_or_server,
381 GMainContext *context)
384 DBusGSource *dbus_source;
386 source = g_source_new (funcs, sizeof (DBusGSource));
388 dbus_source = (DBusGSource *)source;
389 dbus_source->watches = g_hash_table_new (NULL, NULL);
390 dbus_source->connection_or_server = connection_or_server;
391 dbus_source->context = context;
397 * Sets the watch and timeout functions of a #DBusConnection
398 * to integrate the connection with the GLib main loop.
399 * Pass in #NULL for the #GMainContext unless you're
400 * doing something specialized.
402 * @param connection the connection
403 * @param context the #GMainContext or #NULL for default context
406 dbus_connection_setup_with_g_main (DBusConnection *connection,
407 GMainContext *context)
411 source = create_source (connection, &dbus_connection_funcs, context);
413 if (!dbus_connection_set_watch_functions (connection,
420 if (!dbus_connection_set_timeout_functions (connection,
427 dbus_connection_set_wakeup_main_function (connection,
431 g_source_attach (source, context);
433 /* FIXME we never free the slot, so its refcount just keeps growing,
434 * which is kind of broken.
436 dbus_connection_allocate_data_slot (&connection_slot);
437 if (connection_slot < 0)
440 if (!dbus_connection_set_data (connection, connection_slot, source,
441 (DBusFreeFunction)free_source))
447 g_error ("Not enough memory to set up DBusConnection for use with GLib");
451 * Sets the watch and timeout functions of a #DBusServer
452 * to integrate the server with the GLib main loop.
453 * In most cases the context argument should be #NULL.
455 * @param server the server
456 * @param context the #GMainContext or #NULL for default
459 dbus_server_setup_with_g_main (DBusServer *server,
460 GMainContext *context)
464 source = create_source (server, &dbus_server_funcs, context);
466 dbus_server_set_watch_functions (server,
472 dbus_server_set_timeout_functions (server,
478 g_source_attach (source, context);
480 /* FIXME we never free the slot, so its refcount just keeps growing,
481 * which is kind of broken.
483 dbus_server_allocate_data_slot (&server_slot);
487 if (!dbus_server_set_data (server, server_slot, source,
488 (DBusFreeFunction)free_source))
494 g_error ("Not enough memory to set up DBusServer for use with GLib");
497 /** @} */ /* end of public API */
499 #ifdef DBUS_BUILD_TESTS
502 * @ingroup DBusGLibInternals
503 * Unit test for GLib main loop integration
504 * @returns #TRUE on success.
507 _dbus_gmain_test (const char *test_data_dir)
513 #endif /* DBUS_BUILD_TESTS */