diff options
Diffstat (limited to 'rt/timer_gettime.c')
| -rw-r--r-- | rt/timer_gettime.c | 64 |
1 files changed, 55 insertions, 9 deletions
diff --git a/rt/timer_gettime.c b/rt/timer_gettime.c index 7bd94386a4..dd3b4a6281 100644 --- a/rt/timer_gettime.c +++ b/rt/timer_gettime.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 +13,62 @@ 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 <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) { - __set_errno (ENOSYS); - return -1; + 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; } -stub_warning (timer_gettime) |