diff options
Diffstat (limited to 'rt/timer_delete.c')
| -rw-r--r-- | rt/timer_delete.c | 58 |
1 files changed, 49 insertions, 9 deletions
diff --git a/rt/timer_delete.c b/rt/timer_delete.c index 71da429..c6f6d97 100644 --- a/rt/timer_delete.c +++ b/rt/timer_delete.c @@ -1,10 +1,11 @@ -/* Copyright (C) 1999-2021 Free Software Foundation, Inc. +/* Copyright (C) 2000-2021 Free Software Foundation, Inc. This file is part of the GNU C Library. + Contributed by Kaz Kylheku <kaz@ashi.footprints.net>. The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. + modify it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of @@ -12,17 +13,56 @@ Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <https://www.gnu.org/licenses/>. */ + License along with the GNU C Library; see the file COPYING.LIB. If + not, see <https://www.gnu.org/licenses/>. */ +#include <assert.h> #include <errno.h> +#include <pthread.h> #include <time.h> +#include "posix-timer.h" + + /* Delete timer TIMERID. */ int timer_delete (timer_t timerid) { - __set_errno (ENOSYS); - return -1; + struct timer_node *timer; + int retval = -1; + + pthread_mutex_lock (&__timer_mutex); + + timer = timer_id2ptr (timerid); + if (! timer_valid (timer)) + /* Invalid timer ID or the timer is not in use. */ + __set_errno (EINVAL); + else + { + if (timer->armed && timer->thread != NULL) + { + struct thread_node *thread = timer->thread; + assert (thread != NULL); + + /* If thread is cancelled while waiting for handler to terminate, + the mutex is unlocked and timer_delete is aborted. */ + pthread_cleanup_push (__timer_mutex_cancel_handler, &__timer_mutex); + + /* If timer is currently being serviced, wait for it to finish. */ + while (thread->current_timer == timer) + pthread_cond_wait (&thread->cond, &__timer_mutex); + + pthread_cleanup_pop (0); + } + + /* Remove timer from whatever queue it may be on and deallocate it. */ + timer->inuse = TIMER_DELETED; + list_unlink_ip (&timer->links); + timer_delref (timer); + retval = 0; + } + + pthread_mutex_unlock (&__timer_mutex); + + return retval; } -stub_warning (timer_delete) |