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d614a753 | 1 | /* Copyright (C) 2000-2020 Free Software Foundation, Inc. |
76a50749 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Kaz Kylheku <kaz@ashi.footprints.net>. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public License as | |
7 | published by the Free Software Foundation; either version 2.1 of the | |
8 | License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 | 16 | License along with the GNU C Library; see the file COPYING.LIB. If |
5a82c748 | 17 | not, see <https://www.gnu.org/licenses/>. */ |
76a50749 UD |
18 | |
19 | #include <assert.h> | |
20 | #include <errno.h> | |
21 | #include <pthread.h> | |
22 | #include <time.h> | |
23 | ||
24 | #include "posix-timer.h" | |
25 | ||
26 | ||
27 | /* Delete timer TIMERID. */ | |
28 | int | |
9dd346ff | 29 | timer_delete (timer_t timerid) |
76a50749 UD |
30 | { |
31 | struct timer_node *timer; | |
32 | int retval = -1; | |
33 | ||
34 | pthread_mutex_lock (&__timer_mutex); | |
35 | ||
36 | timer = timer_id2ptr (timerid); | |
37 | if (! timer_valid (timer)) | |
38 | /* Invalid timer ID or the timer is not in use. */ | |
39 | __set_errno (EINVAL); | |
40 | else | |
41 | { | |
42 | if (timer->armed && timer->thread != NULL) | |
43 | { | |
44 | struct thread_node *thread = timer->thread; | |
45 | assert (thread != NULL); | |
46 | ||
47 | /* If thread is cancelled while waiting for handler to terminate, | |
48 | the mutex is unlocked and timer_delete is aborted. */ | |
49 | pthread_cleanup_push (__timer_mutex_cancel_handler, &__timer_mutex); | |
50 | ||
51 | /* If timer is currently being serviced, wait for it to finish. */ | |
52 | while (thread->current_timer == timer) | |
53 | pthread_cond_wait (&thread->cond, &__timer_mutex); | |
54 | ||
55 | pthread_cleanup_pop (0); | |
56 | } | |
57 | ||
58 | /* Remove timer from whatever queue it may be on and deallocate it. */ | |
59 | timer->inuse = TIMER_DELETED; | |
60 | list_unlink_ip (&timer->links); | |
61 | timer_delref (timer); | |
62 | retval = 0; | |
63 | } | |
64 | ||
65 | pthread_mutex_unlock (&__timer_mutex); | |
66 | ||
67 | return retval; | |
68 | } |