1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* dbus-server.c DBusServer object
4 * Copyright (C) 2002, 2003, 2004, 2005 Red Hat Inc.
6 * Licensed under the Academic Free License version 2.1
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "dbus-server.h"
25 #include "dbus-server-unix.h"
26 #include "dbus-server-socket.h"
27 #include "dbus-string.h"
28 #ifdef DBUS_BUILD_TESTS
29 #include "dbus-server-debug-pipe.h"
31 #include "dbus-address.h"
32 #include "dbus-protocol.h"
35 * @defgroup DBusServer DBusServer
37 * @brief Server that listens for new connections.
39 * A DBusServer represents a server that other applications
40 * can connect to. Each connection from another application
41 * is represented by a #DBusConnection.
43 * @todo Thread safety hasn't been tested much for #DBusServer
44 * @todo Need notification to apps of disconnection, may matter for some transports
48 * @defgroup DBusServerInternals DBusServer implementation details
49 * @ingroup DBusInternals
50 * @brief Implementation details of DBusServer
55 /* this is a little fragile since it assumes the address doesn't
56 * already have a guid, but it shouldn't
59 copy_address_with_guid_appended (const DBusString *address,
60 const DBusString *guid_hex)
65 if (!_dbus_string_init (&with_guid))
68 if (!_dbus_string_copy (address, 0, &with_guid,
69 _dbus_string_get_length (&with_guid)) ||
70 !_dbus_string_append (&with_guid, ",guid=") ||
71 !_dbus_string_copy (guid_hex, 0,
72 &with_guid, _dbus_string_get_length (&with_guid)))
74 _dbus_string_free (&with_guid);
79 _dbus_string_steal_data (&with_guid, &retval);
81 _dbus_string_free (&with_guid);
83 return retval; /* may be NULL if steal_data failed */
87 * Initializes the members of the DBusServer base class.
88 * Chained up to by subclass constructors.
90 * @param server the server.
91 * @param vtable the vtable for the subclass.
92 * @param address the server's address
93 * @returns #TRUE on success.
96 _dbus_server_init_base (DBusServer *server,
97 const DBusServerVTable *vtable,
98 const DBusString *address)
100 server->vtable = vtable;
101 server->refcount.value = 1;
103 server->address = NULL;
104 server->watches = NULL;
105 server->timeouts = NULL;
107 if (!_dbus_string_init (&server->guid_hex))
110 _dbus_generate_uuid (&server->guid);
112 if (!_dbus_uuid_encode (&server->guid, &server->guid_hex))
115 server->address = copy_address_with_guid_appended (address,
117 if (server->address == NULL)
120 _dbus_mutex_new_at_location (&server->mutex);
121 if (server->mutex == NULL)
124 server->watches = _dbus_watch_list_new ();
125 if (server->watches == NULL)
128 server->timeouts = _dbus_timeout_list_new ();
129 if (server->timeouts == NULL)
132 _dbus_data_slot_list_init (&server->slot_list);
134 _dbus_verbose ("Initialized server on address %s\n", server->address);
139 _dbus_mutex_free_at_location (&server->mutex);
140 server->mutex = NULL;
143 _dbus_watch_list_free (server->watches);
144 server->watches = NULL;
146 if (server->timeouts)
148 _dbus_timeout_list_free (server->timeouts);
149 server->timeouts = NULL;
153 dbus_free (server->address);
154 server->address = NULL;
156 _dbus_string_free (&server->guid_hex);
162 * Finalizes the members of the DBusServer base class.
163 * Chained up to by subclass finalizers.
165 * @param server the server.
168 _dbus_server_finalize_base (DBusServer *server)
170 /* We don't have the lock, but nobody should be accessing
171 * concurrently since they don't have a ref
173 #ifndef DBUS_DISABLE_CHECKS
174 _dbus_assert (!server->have_server_lock);
176 _dbus_assert (server->disconnected);
178 /* calls out to application code... */
179 _dbus_data_slot_list_free (&server->slot_list);
181 dbus_server_set_new_connection_function (server, NULL, NULL, NULL);
183 _dbus_watch_list_free (server->watches);
184 _dbus_timeout_list_free (server->timeouts);
186 _dbus_mutex_free_at_location (&server->mutex);
188 dbus_free (server->address);
190 dbus_free_string_array (server->auth_mechanisms);
192 _dbus_string_free (&server->guid_hex);
196 /** Function to be called in protected_change_watch() with refcount held */
197 typedef dbus_bool_t (* DBusWatchAddFunction) (DBusWatchList *list,
199 /** Function to be called in protected_change_watch() with refcount held */
200 typedef void (* DBusWatchRemoveFunction) (DBusWatchList *list,
202 /** Function to be called in protected_change_watch() with refcount held */
203 typedef void (* DBusWatchToggleFunction) (DBusWatchList *list,
205 dbus_bool_t enabled);
208 protected_change_watch (DBusServer *server,
210 DBusWatchAddFunction add_function,
211 DBusWatchRemoveFunction remove_function,
212 DBusWatchToggleFunction toggle_function,
215 DBusWatchList *watches;
218 HAVE_LOCK_CHECK (server);
220 /* This isn't really safe or reasonable; a better pattern is the "do
221 * everything, then drop lock and call out" one; but it has to be
222 * propagated up through all callers
225 watches = server->watches;
228 server->watches = NULL;
229 _dbus_server_ref_unlocked (server);
230 SERVER_UNLOCK (server);
233 retval = (* add_function) (watches, watch);
234 else if (remove_function)
237 (* remove_function) (watches, watch);
242 (* toggle_function) (watches, watch, enabled);
245 SERVER_LOCK (server);
246 server->watches = watches;
247 _dbus_server_unref_unlocked (server);
256 * Adds a watch for this server, chaining out to application-provided
259 * @param server the server.
260 * @param watch the watch to add.
263 _dbus_server_add_watch (DBusServer *server,
266 HAVE_LOCK_CHECK (server);
267 return protected_change_watch (server, watch,
268 _dbus_watch_list_add_watch,
273 * Removes a watch previously added with _dbus_server_remove_watch().
275 * @param server the server.
276 * @param watch the watch to remove.
279 _dbus_server_remove_watch (DBusServer *server,
282 HAVE_LOCK_CHECK (server);
283 protected_change_watch (server, watch,
285 _dbus_watch_list_remove_watch,
290 * Toggles a watch and notifies app via server's
291 * DBusWatchToggledFunction if available. It's an error to call this
292 * function on a watch that was not previously added.
294 * @param server the server.
295 * @param watch the watch to toggle.
296 * @param enabled whether to enable or disable
299 _dbus_server_toggle_watch (DBusServer *server,
303 _dbus_assert (watch != NULL);
305 HAVE_LOCK_CHECK (server);
306 protected_change_watch (server, watch,
308 _dbus_watch_list_toggle_watch,
312 /** Function to be called in protected_change_timeout() with refcount held */
313 typedef dbus_bool_t (* DBusTimeoutAddFunction) (DBusTimeoutList *list,
314 DBusTimeout *timeout);
315 /** Function to be called in protected_change_timeout() with refcount held */
316 typedef void (* DBusTimeoutRemoveFunction) (DBusTimeoutList *list,
317 DBusTimeout *timeout);
318 /** Function to be called in protected_change_timeout() with refcount held */
319 typedef void (* DBusTimeoutToggleFunction) (DBusTimeoutList *list,
320 DBusTimeout *timeout,
321 dbus_bool_t enabled);
325 protected_change_timeout (DBusServer *server,
326 DBusTimeout *timeout,
327 DBusTimeoutAddFunction add_function,
328 DBusTimeoutRemoveFunction remove_function,
329 DBusTimeoutToggleFunction toggle_function,
332 DBusTimeoutList *timeouts;
335 HAVE_LOCK_CHECK (server);
337 /* This isn't really safe or reasonable; a better pattern is the "do everything, then
338 * drop lock and call out" one; but it has to be propagated up through all callers
341 timeouts = server->timeouts;
344 server->timeouts = NULL;
345 _dbus_server_ref_unlocked (server);
346 SERVER_UNLOCK (server);
349 retval = (* add_function) (timeouts, timeout);
350 else if (remove_function)
353 (* remove_function) (timeouts, timeout);
358 (* toggle_function) (timeouts, timeout, enabled);
361 SERVER_LOCK (server);
362 server->timeouts = timeouts;
363 _dbus_server_unref_unlocked (server);
372 * Adds a timeout for this server, chaining out to
373 * application-provided timeout handlers. The timeout should be
374 * repeatedly handled with dbus_timeout_handle() at its given interval
375 * until it is removed.
377 * @param server the server.
378 * @param timeout the timeout to add.
381 _dbus_server_add_timeout (DBusServer *server,
382 DBusTimeout *timeout)
384 return protected_change_timeout (server, timeout,
385 _dbus_timeout_list_add_timeout,
390 * Removes a timeout previously added with _dbus_server_add_timeout().
392 * @param server the server.
393 * @param timeout the timeout to remove.
396 _dbus_server_remove_timeout (DBusServer *server,
397 DBusTimeout *timeout)
399 protected_change_timeout (server, timeout,
401 _dbus_timeout_list_remove_timeout,
406 * Toggles a timeout and notifies app via server's
407 * DBusTimeoutToggledFunction if available. It's an error to call this
408 * function on a timeout that was not previously added.
410 * @param server the server.
411 * @param timeout the timeout to toggle.
412 * @param enabled whether to enable or disable
415 _dbus_server_toggle_timeout (DBusServer *server,
416 DBusTimeout *timeout,
419 protected_change_timeout (server, timeout,
421 _dbus_timeout_list_toggle_timeout,
427 * Like dbus_server_ref() but does not acquire the lock (must already be held)
429 * @param server the server.
432 _dbus_server_ref_unlocked (DBusServer *server)
434 _dbus_assert (server != NULL);
435 _dbus_assert (server->refcount.value > 0);
437 HAVE_LOCK_CHECK (server);
439 #ifdef DBUS_HAVE_ATOMIC_INT
440 _dbus_atomic_inc (&server->refcount);
442 _dbus_assert (server->refcount.value > 0);
444 server->refcount.value += 1;
449 * Like dbus_server_unref() but does not acquire the lock (must already be held)
451 * @param server the server.
454 _dbus_server_unref_unlocked (DBusServer *server)
456 dbus_bool_t last_unref;
458 /* Keep this in sync with dbus_server_unref */
460 _dbus_assert (server != NULL);
461 _dbus_assert (server->refcount.value > 0);
463 HAVE_LOCK_CHECK (server);
465 #ifdef DBUS_HAVE_ATOMIC_INT
466 last_unref = (_dbus_atomic_dec (&server->refcount) == 1);
468 _dbus_assert (server->refcount.value > 0);
470 server->refcount.value -= 1;
471 last_unref = (server->refcount.value == 0);
476 _dbus_assert (server->disconnected);
478 SERVER_UNLOCK (server);
480 _dbus_assert (server->vtable->finalize != NULL);
482 (* server->vtable->finalize) (server);
489 * @addtogroup DBusServer
496 * @typedef DBusServer
498 * An opaque object representing a server that listens for
499 * connections from other applications. Each time a connection
500 * is made, a new DBusConnection is created and made available
501 * via an application-provided DBusNewConnectionFunction.
502 * The DBusNewConnectionFunction is provided with
503 * dbus_server_set_new_connection_function().
507 static const struct {
508 DBusServerListenResult (* func) (DBusAddressEntry *entry,
509 DBusServer **server_p,
512 { _dbus_server_listen_socket }
513 , { _dbus_server_listen_platform_specific }
514 #ifdef DBUS_BUILD_TESTS
515 , { _dbus_server_listen_debug_pipe }
520 * Listens for new connections on the given address. If there are
521 * multiple semicolon-separated address entries in the address, tries
522 * each one and listens on the first one that works.
524 * Returns #NULL and sets error if listening fails for any reason.
525 * Otherwise returns a new #DBusServer.
526 * dbus_server_set_new_connection_function(),
527 * dbus_server_set_watch_functions(), and
528 * dbus_server_set_timeout_functions() should be called immediately to
529 * render the server fully functional.
531 * To free the server, applications must call first
532 * dbus_server_disconnect() and then dbus_server_unref().
534 * @param address the address of this server.
535 * @param error location to store reason for failure.
536 * @returns a new #DBusServer, or #NULL on failure.
540 dbus_server_listen (const char *address,
544 DBusAddressEntry **entries;
546 DBusError first_connect_error = DBUS_ERROR_INIT;
547 dbus_bool_t handled_once;
549 _dbus_return_val_if_fail (address != NULL, NULL);
550 _dbus_return_val_if_error_is_set (error, NULL);
552 if (!dbus_parse_address (address, &entries, &len, error))
556 handled_once = FALSE;
558 for (i = 0; i < len; i++)
562 for (j = 0; j < (int) _DBUS_N_ELEMENTS (listen_funcs); ++j)
564 DBusServerListenResult result;
565 DBusError tmp_error = DBUS_ERROR_INIT;
567 result = (* listen_funcs[j].func) (entries[i],
571 if (result == DBUS_SERVER_LISTEN_OK)
573 _dbus_assert (server != NULL);
574 _DBUS_ASSERT_ERROR_IS_CLEAR (&tmp_error);
578 else if (result == DBUS_SERVER_LISTEN_BAD_ADDRESS)
580 _dbus_assert (server == NULL);
581 _DBUS_ASSERT_ERROR_IS_SET (&tmp_error);
582 dbus_move_error (&tmp_error, error);
586 else if (result == DBUS_SERVER_LISTEN_NOT_HANDLED)
588 _dbus_assert (server == NULL);
589 _DBUS_ASSERT_ERROR_IS_CLEAR (&tmp_error);
591 /* keep trying addresses */
593 else if (result == DBUS_SERVER_LISTEN_DID_NOT_CONNECT)
595 _dbus_assert (server == NULL);
596 _DBUS_ASSERT_ERROR_IS_SET (&tmp_error);
597 if (!dbus_error_is_set (&first_connect_error))
598 dbus_move_error (&tmp_error, &first_connect_error);
600 dbus_error_free (&tmp_error);
604 /* keep trying addresses */
608 _dbus_assert (server == NULL);
609 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
616 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
618 dbus_set_error (error,
619 DBUS_ERROR_BAD_ADDRESS,
620 "Unknown address type '%s'",
621 dbus_address_entry_get_method (entries[0]));
623 dbus_set_error (error,
624 DBUS_ERROR_BAD_ADDRESS,
625 "Empty address '%s'",
629 dbus_address_entries_free (entries);
633 _dbus_assert (error == NULL || dbus_error_is_set (&first_connect_error) ||
634 dbus_error_is_set (error));
636 if (error && dbus_error_is_set (error))
638 /* already set the error */
642 /* didn't set the error but either error should be
643 * NULL or first_connect_error should be set.
645 _dbus_assert (error == NULL || dbus_error_is_set (&first_connect_error));
646 dbus_move_error (&first_connect_error, error);
649 _DBUS_ASSERT_ERROR_IS_CLEAR (&first_connect_error); /* be sure we freed it */
650 _DBUS_ASSERT_ERROR_IS_SET (error);
656 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
662 * Increments the reference count of a DBusServer.
664 * @param server the server.
665 * @returns the server
668 dbus_server_ref (DBusServer *server)
670 _dbus_return_val_if_fail (server != NULL, NULL);
671 _dbus_return_val_if_fail (server->refcount.value > 0, NULL);
673 #ifdef DBUS_HAVE_ATOMIC_INT
674 _dbus_atomic_inc (&server->refcount);
676 SERVER_LOCK (server);
677 _dbus_assert (server->refcount.value > 0);
679 server->refcount.value += 1;
680 SERVER_UNLOCK (server);
687 * Decrements the reference count of a DBusServer. Finalizes the
688 * server if the reference count reaches zero.
690 * The server must be disconnected before the refcount reaches zero.
692 * @param server the server.
695 dbus_server_unref (DBusServer *server)
697 dbus_bool_t last_unref;
699 /* keep this in sync with unref_unlocked */
701 _dbus_return_if_fail (server != NULL);
702 _dbus_return_if_fail (server->refcount.value > 0);
704 #ifdef DBUS_HAVE_ATOMIC_INT
705 last_unref = (_dbus_atomic_dec (&server->refcount) == 1);
707 SERVER_LOCK (server);
709 _dbus_assert (server->refcount.value > 0);
711 server->refcount.value -= 1;
712 last_unref = (server->refcount.value == 0);
714 SERVER_UNLOCK (server);
720 _dbus_assert (server->disconnected);
722 _dbus_assert (server->vtable->finalize != NULL);
724 (* server->vtable->finalize) (server);
729 * Releases the server's address and stops listening for
730 * new clients. If called more than once, only the first
731 * call has an effect. Does not modify the server's
734 * @param server the server.
737 dbus_server_disconnect (DBusServer *server)
739 _dbus_return_if_fail (server != NULL);
740 _dbus_return_if_fail (server->refcount.value > 0);
742 SERVER_LOCK (server);
743 _dbus_server_ref_unlocked (server);
745 _dbus_assert (server->vtable->disconnect != NULL);
747 if (!server->disconnected)
749 /* this has to be first so recursive calls to disconnect don't happen */
750 server->disconnected = TRUE;
752 (* server->vtable->disconnect) (server);
755 SERVER_UNLOCK (server);
756 dbus_server_unref (server);
760 * Returns #TRUE if the server is still listening for new connections.
762 * @param server the server.
765 dbus_server_get_is_connected (DBusServer *server)
769 _dbus_return_val_if_fail (server != NULL, FALSE);
771 SERVER_LOCK (server);
772 retval = !server->disconnected;
773 SERVER_UNLOCK (server);
779 * Returns the address of the server, as a newly-allocated
780 * string which must be freed by the caller.
782 * @param server the server
783 * @returns the address or #NULL if no memory
786 dbus_server_get_address (DBusServer *server)
790 _dbus_return_val_if_fail (server != NULL, NULL);
792 SERVER_LOCK (server);
793 retval = _dbus_strdup (server->address);
794 SERVER_UNLOCK (server);
800 * Returns the unique ID of the server, as a newly-allocated
801 * string which must be freed by the caller. This ID is
802 * normally used by clients to tell when two #DBusConnection
803 * would be equivalent (because the server address passed
804 * to dbus_connection_open() will have the same guid in the
805 * two cases). dbus_connection_open() can re-use an existing
806 * connection with the same ID instead of opening a new
809 * This is an ID unique to each #DBusServer. Remember that
810 * a #DBusServer represents only one mode of connecting,
811 * so e.g. a bus daemon can listen on multiple addresses
812 * which will mean it has multiple #DBusServer each with
815 * The ID is not a UUID in the sense of RFC4122; the details
816 * are explained in the D-Bus specification.
818 * @param server the server
819 * @returns the id of the server or #NULL if no memory
822 dbus_server_get_id (DBusServer *server)
826 _dbus_return_val_if_fail (server != NULL, NULL);
828 SERVER_LOCK (server);
830 _dbus_string_copy_data (&server->guid_hex, &retval);
831 SERVER_UNLOCK (server);
837 * Sets a function to be used for handling new connections. The given
838 * function is passed each new connection as the connection is
839 * created. If the new connection function increments the connection's
840 * reference count, the connection will stay alive. Otherwise, the
841 * connection will be unreferenced and closed. The new connection
842 * function may also close the connection itself, which is considered
843 * good form if the connection is not wanted.
845 * The connection here is private in the sense of
846 * dbus_connection_open_private(), so if the new connection function
847 * keeps a reference it must arrange for the connection to be closed.
848 * i.e. libdbus does not own this connection once the new connection
849 * function takes a reference.
851 * @param server the server.
852 * @param function a function to handle new connections.
853 * @param data data to pass to the new connection handler.
854 * @param free_data_function function to free the data.
857 dbus_server_set_new_connection_function (DBusServer *server,
858 DBusNewConnectionFunction function,
860 DBusFreeFunction free_data_function)
862 DBusFreeFunction old_free_function;
865 _dbus_return_if_fail (server != NULL);
867 SERVER_LOCK (server);
868 old_free_function = server->new_connection_free_data_function;
869 old_data = server->new_connection_data;
871 server->new_connection_function = function;
872 server->new_connection_data = data;
873 server->new_connection_free_data_function = free_data_function;
874 SERVER_UNLOCK (server);
876 if (old_free_function != NULL)
877 (* old_free_function) (old_data);
881 * Sets the watch functions for the server. These functions are
882 * responsible for making the application's main loop aware of file
883 * descriptors that need to be monitored for events.
885 * This function behaves exactly like dbus_connection_set_watch_functions();
886 * see the documentation for that routine.
888 * @param server the server.
889 * @param add_function function to begin monitoring a new descriptor.
890 * @param remove_function function to stop monitoring a descriptor.
891 * @param toggled_function function to notify when the watch is enabled/disabled
892 * @param data data to pass to add_function and remove_function.
893 * @param free_data_function function to be called to free the data.
894 * @returns #FALSE on failure (no memory)
897 dbus_server_set_watch_functions (DBusServer *server,
898 DBusAddWatchFunction add_function,
899 DBusRemoveWatchFunction remove_function,
900 DBusWatchToggledFunction toggled_function,
902 DBusFreeFunction free_data_function)
905 DBusWatchList *watches;
907 _dbus_return_val_if_fail (server != NULL, FALSE);
909 SERVER_LOCK (server);
910 watches = server->watches;
911 server->watches = NULL;
914 SERVER_UNLOCK (server);
915 result = _dbus_watch_list_set_functions (watches,
921 SERVER_LOCK (server);
925 _dbus_warn_check_failed ("Re-entrant call to %s\n", _DBUS_FUNCTION_NAME);
928 server->watches = watches;
929 SERVER_UNLOCK (server);
935 * Sets the timeout functions for the server. These functions are
936 * responsible for making the application's main loop aware of timeouts.
938 * This function behaves exactly like dbus_connection_set_timeout_functions();
939 * see the documentation for that routine.
941 * @param server the server.
942 * @param add_function function to add a timeout.
943 * @param remove_function function to remove a timeout.
944 * @param toggled_function function to notify when the timeout is enabled/disabled
945 * @param data data to pass to add_function and remove_function.
946 * @param free_data_function function to be called to free the data.
947 * @returns #FALSE on failure (no memory)
950 dbus_server_set_timeout_functions (DBusServer *server,
951 DBusAddTimeoutFunction add_function,
952 DBusRemoveTimeoutFunction remove_function,
953 DBusTimeoutToggledFunction toggled_function,
955 DBusFreeFunction free_data_function)
958 DBusTimeoutList *timeouts;
960 _dbus_return_val_if_fail (server != NULL, FALSE);
962 SERVER_LOCK (server);
963 timeouts = server->timeouts;
964 server->timeouts = NULL;
967 SERVER_UNLOCK (server);
968 result = _dbus_timeout_list_set_functions (timeouts,
974 SERVER_LOCK (server);
978 _dbus_warn_check_failed ("Re-entrant call to %s\n", _DBUS_FUNCTION_NAME);
981 server->timeouts = timeouts;
982 SERVER_UNLOCK (server);
988 * Sets the authentication mechanisms that this server offers to
989 * clients, as a #NULL-terminated array of mechanism names. This
990 * function only affects connections created <em>after</em> it is
991 * called. Pass #NULL instead of an array to use all available
992 * mechanisms (this is the default behavior).
994 * The D-Bus specification describes some of the supported mechanisms.
996 * @param server the server
997 * @param mechanisms #NULL-terminated array of mechanisms
998 * @returns #FALSE if no memory
1001 dbus_server_set_auth_mechanisms (DBusServer *server,
1002 const char **mechanisms)
1006 _dbus_return_val_if_fail (server != NULL, FALSE);
1008 SERVER_LOCK (server);
1010 if (mechanisms != NULL)
1012 copy = _dbus_dup_string_array (mechanisms);
1019 dbus_free_string_array (server->auth_mechanisms);
1020 server->auth_mechanisms = copy;
1022 SERVER_UNLOCK (server);
1028 static DBusDataSlotAllocator slot_allocator;
1029 _DBUS_DEFINE_GLOBAL_LOCK (server_slots);
1032 * Allocates an integer ID to be used for storing application-specific
1033 * data on any DBusServer. The allocated ID may then be used
1034 * with dbus_server_set_data() and dbus_server_get_data().
1035 * The slot must be initialized with -1. If a nonnegative
1036 * slot is passed in, the refcount is incremented on that
1037 * slot, rather than creating a new slot.
1039 * The allocated slot is global, i.e. all DBusServer objects will have
1040 * a slot with the given integer ID reserved.
1042 * @param slot_p address of global variable storing the slot ID
1043 * @returns #FALSE on no memory
1046 dbus_server_allocate_data_slot (dbus_int32_t *slot_p)
1048 return _dbus_data_slot_allocator_alloc (&slot_allocator,
1049 (DBusMutex **)&_DBUS_LOCK_NAME (server_slots),
1054 * Deallocates a global ID for server data slots.
1055 * dbus_server_get_data() and dbus_server_set_data()
1056 * may no longer be used with this slot.
1057 * Existing data stored on existing DBusServer objects
1058 * will be freed when the server is finalized,
1059 * but may not be retrieved (and may only be replaced
1060 * if someone else reallocates the slot).
1062 * @param slot_p address of the slot to deallocate
1065 dbus_server_free_data_slot (dbus_int32_t *slot_p)
1067 _dbus_return_if_fail (*slot_p >= 0);
1069 _dbus_data_slot_allocator_free (&slot_allocator, slot_p);
1073 * Stores a pointer on a DBusServer, along
1074 * with an optional function to be used for freeing
1075 * the data when the data is set again, or when
1076 * the server is finalized. The slot number
1077 * must have been allocated with dbus_server_allocate_data_slot().
1079 * @param server the server
1080 * @param slot the slot number
1081 * @param data the data to store
1082 * @param free_data_func finalizer function for the data
1083 * @returns #TRUE if there was enough memory to store the data
1086 dbus_server_set_data (DBusServer *server,
1089 DBusFreeFunction free_data_func)
1091 DBusFreeFunction old_free_func;
1095 _dbus_return_val_if_fail (server != NULL, FALSE);
1097 SERVER_LOCK (server);
1099 retval = _dbus_data_slot_list_set (&slot_allocator,
1101 slot, data, free_data_func,
1102 &old_free_func, &old_data);
1105 SERVER_UNLOCK (server);
1109 /* Do the actual free outside the server lock */
1111 (* old_free_func) (old_data);
1118 * Retrieves data previously set with dbus_server_set_data().
1119 * The slot must still be allocated (must not have been freed).
1121 * @param server the server
1122 * @param slot the slot to get data from
1123 * @returns the data, or #NULL if not found
1126 dbus_server_get_data (DBusServer *server,
1131 _dbus_return_val_if_fail (server != NULL, NULL);
1133 SERVER_LOCK (server);
1135 res = _dbus_data_slot_list_get (&slot_allocator,
1139 SERVER_UNLOCK (server);
1146 #ifdef DBUS_BUILD_TESTS
1147 #include "dbus-test.h"
1151 _dbus_server_test (void)
1153 const char *valid_addresses[] = {
1155 "tcp:host=localhost,port=1234",
1156 "tcp:host=localhost,port=1234;tcp:port=5678",
1158 "unix:path=./boogie",
1159 "tcp:port=1234;unix:path=./boogie",
1166 for (i = 0; i < _DBUS_N_ELEMENTS (valid_addresses); i++)
1168 DBusError error = DBUS_ERROR_INIT;
1172 server = dbus_server_listen (valid_addresses[i], &error);
1175 _dbus_warn ("server listen error: %s: %s\n", error.name, error.message);
1176 dbus_error_free (&error);
1177 _dbus_assert_not_reached ("Failed to listen for valid address.");
1180 id = dbus_server_get_id (server);
1181 _dbus_assert (id != NULL);
1182 address = dbus_server_get_address (server);
1183 _dbus_assert (address != NULL);
1185 if (strstr (address, id) == NULL)
1187 _dbus_warn ("server id '%s' is not in the server address '%s'\n",
1189 _dbus_assert_not_reached ("bad server id or address");
1193 dbus_free (address);
1195 dbus_server_disconnect (server);
1196 dbus_server_unref (server);
1202 #endif /* DBUS_BUILD_TESTS */