1 | /* Copyright (C) 2000-2022 Free Software Foundation, Inc. |
---|---|
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public License as |
6 | published by the Free Software Foundation; either version 2.1 of the |
7 | License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; see the file COPYING.LIB. If |
16 | not, see <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <assert.h> |
19 | #include <errno.h> |
20 | #include <pthread.h> |
21 | #include <time.h> |
22 | |
23 | #include "posix-timer.h" |
24 | |
25 | |
26 | /* Delete timer TIMERID. */ |
27 | int |
28 | timer_delete (timer_t timerid) |
29 | { |
30 | struct timer_node *timer; |
31 | int retval = -1; |
32 | |
33 | pthread_mutex_lock (mutex: &__timer_mutex); |
34 | |
35 | timer = timer_id2ptr (timerid); |
36 | if (! timer_valid (timer)) |
37 | /* Invalid timer ID or the timer is not in use. */ |
38 | __set_errno (EINVAL); |
39 | else |
40 | { |
41 | if (timer->armed && timer->thread != NULL) |
42 | { |
43 | struct thread_node *thread = timer->thread; |
44 | assert (thread != NULL); |
45 | |
46 | /* If thread is cancelled while waiting for handler to terminate, |
47 | the mutex is unlocked and timer_delete is aborted. */ |
48 | pthread_cleanup_push (__timer_mutex_cancel_handler, &__timer_mutex); |
49 | |
50 | /* If timer is currently being serviced, wait for it to finish. */ |
51 | while (thread->current_timer == timer) |
52 | pthread_cond_wait (cond: &thread->cond, mutex: &__timer_mutex); |
53 | |
54 | pthread_cleanup_pop (0); |
55 | } |
56 | |
57 | /* Remove timer from whatever queue it may be on and deallocate it. */ |
58 | timer->inuse = TIMER_DELETED; |
59 | list_unlink_ip (list: &timer->links); |
60 | timer_delref (timer); |
61 | retval = 0; |
62 | } |
63 | |
64 | pthread_mutex_unlock (mutex: &__timer_mutex); |
65 | |
66 | return retval; |
67 | } |
68 |