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dff8da6b | 1 | /* Copyright (C) 2000-2024 Free Software Foundation, Inc. |
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2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
daa3fc9b FW |
5 | modify it under the terms of the GNU Lesser General Public License as |
6 | published by the Free Software Foundation; either version 2.1 of the | |
7 | License, or (at your option) any later version. | |
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8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
be1dd949 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
daa3fc9b FW |
15 | License along with the GNU C Library; see the file COPYING.LIB. If |
16 | not, see <https://www.gnu.org/licenses/>. */ | |
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17 | |
18 | #include <errno.h> | |
daa3fc9b | 19 | #include <pthread.h> |
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20 | #include <time.h> |
21 | ||
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22 | #include "posix-timer.h" |
23 | ||
24 | ||
7f0d9e61 | 25 | /* Get current value of timer TIMERID and store it in VALUE. */ |
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26 | int |
27 | timer_gettime (timer_t timerid, struct itimerspec *value) | |
28 | { | |
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29 | struct timer_node *timer; |
30 | struct timespec now, expiry; | |
31 | int retval = -1, armed = 0, valid; | |
32 | clock_t clock = 0; | |
33 | ||
34 | pthread_mutex_lock (&__timer_mutex); | |
35 | ||
36 | timer = timer_id2ptr (timerid); | |
37 | valid = timer_valid (timer); | |
38 | ||
39 | if (valid) { | |
40 | armed = timer->armed; | |
41 | expiry = timer->expirytime; | |
42 | clock = timer->clock; | |
43 | value->it_interval = timer->value.it_interval; | |
44 | } | |
45 | ||
46 | pthread_mutex_unlock (&__timer_mutex); | |
47 | ||
48 | if (valid) | |
49 | { | |
50 | if (armed) | |
51 | { | |
52 | __clock_gettime (clock, &now); | |
53 | if (timespec_compare (&now, &expiry) < 0) | |
54 | timespec_sub (&value->it_value, &expiry, &now); | |
55 | else | |
56 | { | |
57 | value->it_value.tv_sec = 0; | |
58 | value->it_value.tv_nsec = 0; | |
59 | } | |
60 | } | |
61 | else | |
62 | { | |
63 | value->it_value.tv_sec = 0; | |
64 | value->it_value.tv_nsec = 0; | |
65 | } | |
66 | ||
67 | retval = 0; | |
68 | } | |
69 | else | |
70 | __set_errno (EINVAL); | |
71 | ||
72 | return retval; | |
be1dd949 | 73 | } |