D-Bus: dbus-timeout.c Source File

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dbus-timeout.c
1/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2/* dbus-timeout.c DBusTimeout implementation
3 *
4 * Copyright (C) 2003 CodeFactory AB
5 *
6 * SPDX-License-Identifier: AFL-2.1 OR GPL-2.0-or-later
7 *
8 * Licensed under the Academic Free License version 2.1
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 *
24 */
25
26#include <config.h>
27#include "dbus-internals.h"
28#include "dbus-timeout.h"
29#include "dbus-list.h"
30
42 struct DBusTimeout
43{
44 int refcount;
45 int interval;
47 DBusTimeoutHandler handler;
48 void *handler_data;
49 DBusFreeFunction free_handler_data_function;
51 void *data;
52 DBusFreeFunction free_data_function;
53 unsigned int enabled : 1;
54 unsigned int needs_restart : 1;
55};
56
65 DBusTimeout*
66_dbus_timeout_new (int interval,
67 DBusTimeoutHandler handler,
68 void *data,
69 DBusFreeFunction free_data_function)
70{
71 DBusTimeout *timeout;
72
73 timeout = dbus_new0 (DBusTimeout, 1);
74 if (timeout == NULL)
75 return NULL;
76
77 timeout->refcount = 1;
78 timeout->interval = interval;
79
80 timeout->handler = handler;
81 timeout->handler_data = data;
82 timeout->free_handler_data_function = free_data_function;
83
84 timeout->enabled = TRUE;
85 timeout->needs_restart = FALSE;
86
87 return timeout;
88}
89
96 DBusTimeout *
97_dbus_timeout_ref (DBusTimeout *timeout)
98{
99 timeout->refcount += 1;
100
101 return timeout;
102}
103
110void
111_dbus_timeout_unref (DBusTimeout *timeout)
112{
113 _dbus_assert (timeout != NULL);
114 _dbus_assert (timeout->refcount > 0);
115
116 timeout->refcount -= 1;
117 if (timeout->refcount == 0)
118 {
119 dbus_timeout_set_data (timeout, NULL, NULL); /* call free_data_function */
120
121 if (timeout->free_handler_data_function)
122 (* timeout->free_handler_data_function) (timeout->handler_data);
123
124 dbus_free (timeout);
125 }
126}
127
139void
140_dbus_timeout_restart (DBusTimeout *timeout,
141 int interval)
142{
143 _dbus_assert (interval >= 0);
144
145 timeout->interval = interval;
146 timeout->enabled = TRUE;
147 timeout->needs_restart = TRUE;
148}
149
160void
161_dbus_timeout_disable (DBusTimeout *timeout)
162{
163 timeout->enabled = FALSE;
164}
165
182 struct DBusTimeoutList
183{
184 DBusList *timeouts;
186 DBusAddTimeoutFunction add_timeout_function;
187 DBusRemoveTimeoutFunction remove_timeout_function;
188 DBusTimeoutToggledFunction timeout_toggled_function;
189 void *timeout_data;
190 DBusFreeFunction timeout_free_data_function;
191};
192
199 DBusTimeoutList*
200_dbus_timeout_list_new (void)
201{
202 DBusTimeoutList *timeout_list;
203
204 timeout_list = dbus_new0 (DBusTimeoutList, 1);
205 if (timeout_list == NULL)
206 return NULL;
207
208 return timeout_list;
209}
210
216void
217_dbus_timeout_list_free (DBusTimeoutList *timeout_list)
218{
219 /* free timeout_data and remove timeouts as a side effect */
220 _dbus_timeout_list_set_functions (timeout_list,
221 NULL, NULL, NULL, NULL, NULL);
222
223 _dbus_list_clear_full (&timeout_list->timeouts,
224 (DBusFreeFunction) _dbus_timeout_unref);
225
226 dbus_free (timeout_list);
227}
228
242 dbus_bool_t
243_dbus_timeout_list_set_functions (DBusTimeoutList *timeout_list,
244 DBusAddTimeoutFunction add_function,
245 DBusRemoveTimeoutFunction remove_function,
246 DBusTimeoutToggledFunction toggled_function,
247 void *data,
248 DBusFreeFunction free_data_function)
249{
250 /* Add timeouts with the new function, failing on OOM */
251 if (add_function != NULL)
252 {
253 DBusList *link;
254
255 link = _dbus_list_get_first_link (&timeout_list->timeouts);
256 while (link != NULL)
257 {
258 DBusList *next = _dbus_list_get_next_link (&timeout_list->timeouts,
259 link);
260
261 if (!(* add_function) (link->data, data))
262 {
263 /* remove it all again and return FALSE */
264 DBusList *link2;
265
266 link2 = _dbus_list_get_first_link (&timeout_list->timeouts);
267 while (link2 != link)
268 {
269 DBusList *next2 = _dbus_list_get_next_link (&timeout_list->timeouts,
270 link2);
271
272 (* remove_function) (link2->data, data);
273
274 link2 = next2;
275 }
276
277 return FALSE;
278 }
279
280 link = next;
281 }
282 }
283
284 /* Remove all current timeouts from previous timeout handlers */
285
286 if (timeout_list->remove_timeout_function != NULL)
287 {
288 _dbus_list_foreach (&timeout_list->timeouts,
289 (DBusForeachFunction) timeout_list->remove_timeout_function,
290 timeout_list->timeout_data);
291 }
292
293 if (timeout_list->timeout_free_data_function != NULL)
294 (* timeout_list->timeout_free_data_function) (timeout_list->timeout_data);
295
296 timeout_list->add_timeout_function = add_function;
297 timeout_list->remove_timeout_function = remove_function;
298 timeout_list->timeout_toggled_function = toggled_function;
299 timeout_list->timeout_data = data;
300 timeout_list->timeout_free_data_function = free_data_function;
301
302 return TRUE;
303}
304
313 dbus_bool_t
314_dbus_timeout_list_add_timeout (DBusTimeoutList *timeout_list,
315 DBusTimeout *timeout)
316{
317 if (!_dbus_list_append (&timeout_list->timeouts, timeout))
318 return FALSE;
319
320 _dbus_timeout_ref (timeout);
321
322 if (timeout_list->add_timeout_function != NULL)
323 {
324 if (!(* timeout_list->add_timeout_function) (timeout,
325 timeout_list->timeout_data))
326 {
327 _dbus_list_remove_last (&timeout_list->timeouts, timeout);
328 _dbus_timeout_unref (timeout);
329 return FALSE;
330 }
331 }
332
333 return TRUE;
334}
335
343void
344_dbus_timeout_list_remove_timeout (DBusTimeoutList *timeout_list,
345 DBusTimeout *timeout)
346{
347 if (!_dbus_list_remove (&timeout_list->timeouts, timeout))
348 _dbus_assert_not_reached ("Nonexistent timeout was removed");
349
350 if (timeout_list->remove_timeout_function != NULL)
351 (* timeout_list->remove_timeout_function) (timeout,
352 timeout_list->timeout_data);
353
354 _dbus_timeout_unref (timeout);
355}
356
365void
366_dbus_timeout_list_toggle_timeout (DBusTimeoutList *timeout_list,
367 DBusTimeout *timeout,
368 dbus_bool_t enabled)
369{
370 enabled = !!enabled;
371
372 if (enabled == timeout->enabled)
373 return;
374
375 timeout->enabled = enabled;
376
377 if (timeout_list->timeout_toggled_function != NULL)
378 (* timeout_list->timeout_toggled_function) (timeout,
379 timeout_list->timeout_data);
380}
381
388 dbus_bool_t
389_dbus_timeout_needs_restart (DBusTimeout *timeout)
390{
391 return timeout->needs_restart;
392}
393
400void
401_dbus_timeout_restarted (DBusTimeout *timeout)
402{
403 timeout->needs_restart = FALSE;
404}
405
443int
444dbus_timeout_get_interval (DBusTimeout *timeout)
445{
446 return timeout->interval;
447}
448
456void*
457dbus_timeout_get_data (DBusTimeout *timeout)
458{
459 return timeout->data;
460}
461
473void
474dbus_timeout_set_data (DBusTimeout *timeout,
475 void *data,
476 DBusFreeFunction free_data_function)
477{
478 if (timeout->free_data_function != NULL)
479 (* timeout->free_data_function) (timeout->data);
480
481 timeout->data = data;
482 timeout->free_data_function = free_data_function;
483}
484
499 dbus_bool_t
500dbus_timeout_handle (DBusTimeout *timeout)
501{
502 return (* timeout->handler) (timeout->handler_data);
503}
504
505
513 dbus_bool_t
514dbus_timeout_get_enabled (DBusTimeout *timeout)
515{
516 return timeout->enabled;
517}
518
DBusTimeoutToggledFunction
void(* DBusTimeoutToggledFunction)(DBusTimeout *timeout, void *data)
Called when dbus_timeout_get_enabled() may return a different value than it did before.
Definition dbus-connection.h:120
DBusAddTimeoutFunction
dbus_bool_t(* DBusAddTimeoutFunction)(DBusTimeout *timeout, void *data)
Called when libdbus needs a new timeout to be monitored by the main loop.
Definition dbus-connection.h:113
DBusRemoveTimeoutFunction
void(* DBusRemoveTimeoutFunction)(DBusTimeout *timeout, void *data)
Called when libdbus no longer needs a timeout to be monitored by the main loop.
Definition dbus-connection.h:126
_dbus_assert_not_reached
#define _dbus_assert_not_reached(explanation)
Aborts with an error message if called.
Definition dbus-internals.h:164
_dbus_assert
#define _dbus_assert(condition)
Aborts with an error message if the condition is false.
Definition dbus-internals.h:153
DBusForeachFunction
void(* DBusForeachFunction)(void *element, void *data)
Used to iterate over each item in a collection, such as a DBusList.
Definition dbus-internals.h:347
_dbus_list_get_first_link
DBusList * _dbus_list_get_first_link(DBusList **list)
Gets the first link in the list.
Definition dbus-list.c:597
_dbus_list_remove
dbus_bool_t _dbus_list_remove(DBusList **list, void *data)
Removes a value from the list.
Definition dbus-list.c:418
_dbus_list_clear_full
void _dbus_list_clear_full(DBusList **list, DBusFreeFunction function)
Free every link and every element in the list.
Definition dbus-list.c:570
_dbus_list_foreach
void _dbus_list_foreach(DBusList **list, DBusForeachFunction function, void *data)
Calls the given function for each element in the list.
Definition dbus-list.c:789
_dbus_list_remove_last
dbus_bool_t _dbus_list_remove_last(DBusList **list, void *data)
Removes a value from the list.
Definition dbus-list.c:449
_dbus_list_append
dbus_bool_t _dbus_list_append(DBusList **list, void *data)
Appends a value to the list.
Definition dbus-list.c:273
_dbus_list_get_next_link
#define _dbus_list_get_next_link(list, link)
Gets the next link in the list, or NULL if there are no more links.
Definition dbus-list.h:121
NULL
#define NULL
A null pointer, defined appropriately for C or C++.
Definition dbus-macros.h:51
TRUE
#define TRUE
Expands to "1".
Definition dbus-macros.h:41
FALSE
#define FALSE
Expands to "0".
Definition dbus-macros.h:44
dbus_free
void dbus_free(void *memory)
Frees a block of memory previously allocated by dbus_malloc() or dbus_malloc0().
Definition dbus-memory.c:710
DBusFreeFunction
void(* DBusFreeFunction)(void *memory)
The type of a function which frees a block of memory.
Definition dbus-memory.h:65
dbus_new0
#define dbus_new0(type, count)
Safe macro for using dbus_malloc0().
Definition dbus-memory.h:60
_dbus_timeout_list_add_timeout
dbus_bool_t _dbus_timeout_list_add_timeout(DBusTimeoutList *timeout_list, DBusTimeout *timeout)
Adds a new timeout to the timeout list, invoking the application DBusAddTimeoutFunction if appropriat...
Definition dbus-timeout.c:314
_dbus_timeout_list_free
void _dbus_timeout_list_free(DBusTimeoutList *timeout_list)
Frees a DBusTimeoutList.
Definition dbus-timeout.c:217
_dbus_timeout_list_toggle_timeout
void _dbus_timeout_list_toggle_timeout(DBusTimeoutList *timeout_list, DBusTimeout *timeout, dbus_bool_t enabled)
Sets a timeout to the given enabled state, invoking the application's DBusTimeoutToggledFunction if a...
Definition dbus-timeout.c:366
_dbus_timeout_list_new
DBusTimeoutList * _dbus_timeout_list_new(void)
Creates a new timeout list.
Definition dbus-timeout.c:200
_dbus_timeout_unref
void _dbus_timeout_unref(DBusTimeout *timeout)
Decrements the reference count of a DBusTimeout object and finalizes the object if the count reaches ...
Definition dbus-timeout.c:111
_dbus_timeout_list_set_functions
dbus_bool_t _dbus_timeout_list_set_functions(DBusTimeoutList *timeout_list, DBusAddTimeoutFunction add_function, DBusRemoveTimeoutFunction remove_function, DBusTimeoutToggledFunction toggled_function, void *data, DBusFreeFunction free_data_function)
Sets the timeout functions.
Definition dbus-timeout.c:243
_dbus_timeout_disable
void _dbus_timeout_disable(DBusTimeout *timeout)
Disable the timeout.
Definition dbus-timeout.c:161
_dbus_timeout_new
DBusTimeout * _dbus_timeout_new(int interval, DBusTimeoutHandler handler, void *data, DBusFreeFunction free_data_function)
Creates a new DBusTimeout, enabled by default.
Definition dbus-timeout.c:66
_dbus_timeout_restart
void _dbus_timeout_restart(DBusTimeout *timeout, int interval)
Change the timeout interval to be interval milliseconds from now (forgetting when the timeout was ini...
Definition dbus-timeout.c:140
DBusTimeoutHandler
dbus_bool_t(* DBusTimeoutHandler)(void *data)
function to run when the timeout is handled
Definition dbus-timeout.h:43
_dbus_timeout_ref
DBusTimeout * _dbus_timeout_ref(DBusTimeout *timeout)
Increments the reference count of a DBusTimeout object.
Definition dbus-timeout.c:97
_dbus_timeout_restarted
void _dbus_timeout_restarted(DBusTimeout *timeout)
Mark timeout as restarted (setting timestamps is responsibility of the event loop).
Definition dbus-timeout.c:401
_dbus_timeout_list_remove_timeout
void _dbus_timeout_list_remove_timeout(DBusTimeoutList *timeout_list, DBusTimeout *timeout)
Removes a timeout from the timeout list, invoking the application's DBusRemoveTimeoutFunction if appr...
Definition dbus-timeout.c:344
_dbus_timeout_needs_restart
dbus_bool_t _dbus_timeout_needs_restart(DBusTimeout *timeout)
Returns whether a timeout needs restart time counting in the event loop.
Definition dbus-timeout.c:389
dbus_timeout_handle
DBUS_EXPORT dbus_bool_t dbus_timeout_handle(DBusTimeout *timeout)
Calls the timeout handler for this timeout.
Definition dbus-timeout.c:500
dbus_timeout_get_enabled
DBUS_EXPORT dbus_bool_t dbus_timeout_get_enabled(DBusTimeout *timeout)
Returns whether a timeout is enabled or not.
Definition dbus-timeout.c:514
dbus_timeout_get_interval
DBUS_EXPORT int dbus_timeout_get_interval(DBusTimeout *timeout)
Gets the timeout interval.
Definition dbus-timeout.c:444
dbus_timeout_get_data
DBUS_EXPORT void * dbus_timeout_get_data(DBusTimeout *timeout)
Gets data previously set with dbus_timeout_set_data() or NULL if none.
Definition dbus-timeout.c:457
dbus_timeout_set_data
DBUS_EXPORT void dbus_timeout_set_data(DBusTimeout *timeout, void *data, DBusFreeFunction free_data_function)
Sets data which can be retrieved with dbus_timeout_get_data().
Definition dbus-timeout.c:474
dbus_bool_t
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE.
Definition dbus-types.h:37
DBusList
A node in a linked list.
Definition dbus-list.h:37
DBusList::data
void * data
Data stored at this element.
Definition dbus-list.h:40
DBusTimeoutList
DBusTimeoutList implementation details.
Definition dbus-timeout.c:183
DBusTimeoutList::timeout_toggled_function
DBusTimeoutToggledFunction timeout_toggled_function
Callback when timeout is enabled/disabled or changes interval.
Definition dbus-timeout.c:188
DBusTimeoutList::remove_timeout_function
DBusRemoveTimeoutFunction remove_timeout_function
Callback for removing a timeout.
Definition dbus-timeout.c:187
DBusTimeoutList::timeouts
DBusList * timeouts
Timeout objects.
Definition dbus-timeout.c:184
DBusTimeoutList::add_timeout_function
DBusAddTimeoutFunction add_timeout_function
Callback for adding a timeout.
Definition dbus-timeout.c:186
DBusTimeoutList::timeout_free_data_function
DBusFreeFunction timeout_free_data_function
Free function for timeout callback data.
Definition dbus-timeout.c:190
DBusTimeoutList::timeout_data
void * timeout_data
Data for timeout callbacks.
Definition dbus-timeout.c:189
DBusTimeout
Internals of DBusTimeout.
Definition dbus-timeout.c:43
DBusTimeout::data
void * data
Application data.
Definition dbus-timeout.c:51
DBusTimeout::refcount
int refcount
Reference count.
Definition dbus-timeout.c:44
DBusTimeout::enabled
unsigned int enabled
True if timeout is active.
Definition dbus-timeout.c:53
DBusTimeout::handler
DBusTimeoutHandler handler
Timeout handler.
Definition dbus-timeout.c:47
DBusTimeout::handler_data
void * handler_data
Timeout handler data.
Definition dbus-timeout.c:48
DBusTimeout::interval
int interval
Timeout interval in milliseconds.
Definition dbus-timeout.c:45
DBusTimeout::needs_restart
unsigned int needs_restart
Flag that timeout should be restarted after re-enabling.
Definition dbus-timeout.c:54
DBusTimeout::free_handler_data_function
DBusFreeFunction free_handler_data_function
Free the timeout handler data.
Definition dbus-timeout.c:49
DBusTimeout::free_data_function
DBusFreeFunction free_data_function
Free the application data.
Definition dbus-timeout.c:52