1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
3 * include/linux/timerfd.h
5 * Copyright (C) 2007 Davide Libenzi <davidel@xmailserver.org>
9 #ifndef _UAPI_LINUX_TIMERFD_H
10 #define _UAPI_LINUX_TIMERFD_H
12 #include <linux/types.h>
14 /* For O_CLOEXEC and O_NONBLOCK */
15 #include <linux/fcntl.h>
18 #include <linux/ioctl.h>
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
27 * Also make sure to update the masks in include/linux/timerfd.h
28 * when adding new flags.
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
35 #define TFD_IOC_SET_TICKS _IOW('T', 0, __u64)
37 #endif /* _UAPI_LINUX_TIMERFD_H */