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2b778ceb | 1 | /* Copyright (C) 2000-2021 Free Software Foundation, Inc. |
76a50749 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Kaz Kylheku <kaz@ashi.footprints.net>. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public License as | |
7 | published by the Free Software Foundation; either version 2.1 of the | |
8 | License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 | 16 | License along with the GNU C Library; see the file COPYING.LIB. If |
5a82c748 | 17 | not, see <https://www.gnu.org/licenses/>. */ |
76a50749 UD |
18 | |
19 | #include <errno.h> | |
20 | #include <pthread.h> | |
21 | #include <time.h> | |
22 | ||
23 | #include "posix-timer.h" | |
24 | ||
25 | ||
26 | /* Get current value of timer TIMERID and store it in VLAUE. */ | |
27 | int | |
bd2260a2 | 28 | timer_gettime (timer_t timerid, struct itimerspec *value) |
76a50749 UD |
29 | { |
30 | struct timer_node *timer; | |
31 | struct timespec now, expiry; | |
32 | int retval = -1, armed = 0, valid; | |
33 | clock_t clock = 0; | |
34 | ||
35 | pthread_mutex_lock (&__timer_mutex); | |
36 | ||
37 | timer = timer_id2ptr (timerid); | |
38 | valid = timer_valid (timer); | |
39 | ||
40 | if (valid) { | |
41 | armed = timer->armed; | |
42 | expiry = timer->expirytime; | |
43 | clock = timer->clock; | |
44 | value->it_interval = timer->value.it_interval; | |
45 | } | |
46 | ||
47 | pthread_mutex_unlock (&__timer_mutex); | |
48 | ||
49 | if (valid) | |
50 | { | |
51 | if (armed) | |
52 | { | |
dba2bdbe | 53 | __clock_gettime (clock, &now); |
1683daeb UD |
54 | if (timespec_compare (&now, &expiry) < 0) |
55 | timespec_sub (&value->it_value, &expiry, &now); | |
56 | else | |
57 | { | |
58 | value->it_value.tv_sec = 0; | |
59 | value->it_value.tv_nsec = 0; | |
60 | } | |
76a50749 UD |
61 | } |
62 | else | |
63 | { | |
64 | value->it_value.tv_sec = 0; | |
65 | value->it_value.tv_nsec = 0; | |
66 | } | |
67 | ||
68 | retval = 0; | |
69 | } | |
70 | else | |
71 | __set_errno (EINVAL); | |
72 | ||
73 | return retval; | |
74 | } |