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d614a753 | 1 | /* Copyright (C) 2003-2020 Free Software Foundation, Inc. |
09402f5b UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2003. | |
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/>. */ |
09402f5b UD |
18 | |
19 | #include <pthread.h> | |
20 | #include <setjmp.h> | |
21 | #include <signal.h> | |
f07d2345 | 22 | #include <sys/types.h> |
09402f5b UD |
23 | |
24 | ||
25 | /* Nonzero if the system calls are not available. */ | |
26 | extern int __no_posix_timers attribute_hidden; | |
27 | ||
f07d2345 UD |
28 | /* Callback to start helper thread. */ |
29 | extern void __start_helper_thread (void) attribute_hidden; | |
30 | ||
31 | /* Control variable for helper thread creation. */ | |
32 | extern pthread_once_t __helper_once attribute_hidden; | |
33 | ||
34 | /* TID of the helper thread. */ | |
35 | extern pid_t __helper_tid attribute_hidden; | |
09402f5b | 36 | |
f160a450 UD |
37 | /* List of active SIGEV_THREAD timers. */ |
38 | extern struct timer *__active_timer_sigev_thread attribute_hidden; | |
39 | /* Lock for the __active_timer_sigev_thread. */ | |
40 | extern pthread_mutex_t __active_timer_sigev_thread_lock attribute_hidden; | |
41 | ||
09402f5b UD |
42 | |
43 | /* Type of timers in the kernel. */ | |
44 | typedef int kernel_timer_t; | |
45 | ||
46 | ||
47 | /* Internal representation of timer. */ | |
48 | struct timer | |
49 | { | |
50 | /* Notification mechanism. */ | |
51 | int sigev_notify; | |
52 | ||
53 | /* Timer ID returned by the kernel. */ | |
54 | kernel_timer_t ktimerid; | |
55 | ||
56 | /* All new elements must be added after ktimerid. And if the thrfunc | |
57 | element is not the third element anymore the memory allocation in | |
58 | timer_create needs to be changed. */ | |
59 | ||
60 | /* Parameters for the thread to be started for SIGEV_THREAD. */ | |
61 | void (*thrfunc) (sigval_t); | |
62 | sigval_t sival; | |
63 | pthread_attr_t attr; | |
f160a450 UD |
64 | |
65 | /* Next element in list of active SIGEV_THREAD timers. */ | |
66 | struct timer *next; | |
09402f5b | 67 | }; |