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/* Copyright (C) 2000, 2001 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. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 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; see the file COPYING.LIB. If not, see <http://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) { 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; } |