1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /*
3 * include/linux/timerfd.h
4 *
5 * Copyright (C) 2007 Davide Libenzi <davidel@xmailserver.org>
6 *
7 */
8
9 #ifndef _UAPI_LINUX_TIMERFD_H
10 #define _UAPI_LINUX_TIMERFD_H
11
12 #include <linux/types.h>
13
14 /* For O_CLOEXEC and O_NONBLOCK */
15 #include <linux/fcntl.h>
16
17 /* For _IO helpers */
18 #include <linux/ioctl.h>
19
20 /*
21 * CAREFUL: Check include/asm-generic/fcntl.h when defining
22 * new flags, since they might collide with O_* ones. We want
23 * to re-use O_* flags that couldn't possibly have a meaning
24 * from eventfd, in order to leave a free define-space for
25 * shared O_* flags.
26 *
27 * Also make sure to update the masks in include/linux/timerfd.h
28 * when adding new flags.
29 */
30 #define TFD_TIMER_ABSTIME (1 << 0)
31 #define TFD_TIMER_CANCEL_ON_SET (1 << 1)
32 #define TFD_CLOEXEC O_CLOEXEC
33 #define TFD_NONBLOCK O_NONBLOCK
34
35 #define TFD_IOC_SET_TICKS _IOW('T', 0, __u64)
36
37 #endif /* _UAPI_LINUX_TIMERFD_H */