| 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 |