glibc (2.38)
1 /* Copyright (C) 2008-2023 Free Software Foundation, Inc.
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
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
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
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #ifndef _SYS_TIMERFD_H
19 #define _SYS_TIMERFD_H 1
20
21 #include <time.h>
22 #include <bits/types/struct_itimerspec.h>
23
24 /* Get the platform-dependent flags. */
25 #include <bits/timerfd.h>
26
27
28 /* Bits to be set in the FLAGS parameter of `timerfd_settime'. */
29 enum
30 {
31 TFD_TIMER_ABSTIME = 1 << 0,
32 #define TFD_TIMER_ABSTIME TFD_TIMER_ABSTIME
33 TFD_TIMER_CANCEL_ON_SET = 1 << 1
34 #define TFD_TIMER_CANCEL_ON_SET TFD_TIMER_CANCEL_ON_SET
35 };
36
37
38 __BEGIN_DECLS
39
40 /* Return file descriptor for new interval timer source. */
41 extern int timerfd_create (__clockid_t __clock_id, int __flags) __THROW;
42
43 /* Set next expiration time of interval timer source UFD to UTMR. If
44 FLAGS has the TFD_TIMER_ABSTIME flag set the timeout value is
45 absolute. Optionally return the old expiration time in OTMR. */
46 extern int timerfd_settime (int __ufd, int __flags,
47 const struct itimerspec *__utmr,
48 struct itimerspec *__otmr) __THROW;
49
50 #ifdef __USE_TIME_BITS64
51 # if defined(__REDIRECT_NTH)
52 extern int __REDIRECT_NTH (timerfd_settime,
53 (int __ufd, int __flags,
54 const struct itimerspec *__restrict __value,
55 struct itimerspec *__restrict __ovalue),
56 __timerfd_settime64);
57 # else
58 # define timerfd_settime __timerfd_settime64
59 # endif
60 #endif
61
62 /* Return the next expiration time of UFD. */
63 extern int timerfd_gettime (int __ufd, struct itimerspec *__otmr) __THROW;
64
65 #ifdef __USE_TIME_BITS64
66 # if defined(__REDIRECT_NTH)
67 extern int __REDIRECT_NTH (timerfd_gettime, (int __ufd,
68 struct itimerspec *__otmr),
69 __timerfd_gettime64);
70 # else
71 # define timerfd_gettime __timerfd_gettime64
72 # endif
73 #endif
74
75 __END_DECLS
76
77 #endif /* sys/timerfd.h */
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