| /* Copyright (C) 2000-2018 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 <errno.h> |
| #include <pthread.h> |
| #include <time.h> |
| |
| #include "posix-timer.h" |
| |
| |
| /* Get current value of timer TIMERID and store it in VLAUE. */ |
| int |
| timer_gettime (timer_t timerid, struct itimerspec *value) |
| { |
| struct timer_node *timer; |
| struct timespec now, expiry; |
| int retval = -1, armed = 0, valid; |
| clock_t clock = 0; |
| |
| pthread_mutex_lock (&__timer_mutex); |
| |
| timer = timer_id2ptr (timerid); |
| valid = timer_valid (timer); |
| |
| if (valid) { |
| armed = timer->armed; |
| expiry = timer->expirytime; |
| clock = timer->clock; |
| value->it_interval = timer->value.it_interval; |
| } |
| |
| pthread_mutex_unlock (&__timer_mutex); |
| |
| if (valid) |
| { |
| if (armed) |
| { |
| clock_gettime (clock, &now); |
| if (timespec_compare (&now, &expiry) < 0) |
| timespec_sub (&value->it_value, &expiry, &now); |
| else |
| { |
| value->it_value.tv_sec = 0; |
| value->it_value.tv_nsec = 0; |
| } |
| } |
| else |
| { |
| value->it_value.tv_sec = 0; |
| value->it_value.tv_nsec = 0; |
| } |
| |
| retval = 0; |
| } |
| else |
| __set_errno (EINVAL); |
| |
| return retval; |
| } |