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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright (c) 2015 Joyent, Inc. All rights reserved.
*/
/*
* Header file to support for the timerfd facility.
*/
#ifndef _SYS_TIMERFD_H
#define _SYS_TIMERFD_H
#include <sys/types.h>
#include <sys/time_impl.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* To assure binary compatibility with Linux, these values are fixed at their
* Linux equivalents, not their native ones.
*/
#define TFD_CLOEXEC 02000000 /* LX_O_CLOEXEC */
#define TFD_NONBLOCK 04000 /* LX_O_NONBLOCK */
#define TFD_TIMER_ABSTIME (1 << 0)
#define TFD_TIMER_CANCEL_ON_SET (1 << 1)
/*
* These ioctl values are specific to the native implementation; applications
* shouldn't be using them directly, and they should therefore be safe to
* change without breaking apps.
*/
#define TIMERFDIOC (('t' << 24) | ('f' << 16) | ('d' << 8))
#define TIMERFDIOC_CREATE (TIMERFDIOC | 1) /* create timer */
#define TIMERFDIOC_SETTIME (TIMERFDIOC | 2) /* timerfd_settime() */
#define TIMERFDIOC_GETTIME (TIMERFDIOC | 3) /* timerfd_gettime() */
typedef struct timerfd_settime {
uint64_t tfd_settime_flags; /* flags (e.g., TFD_TIMER_ABSTIME) */
uint64_t tfd_settime_value; /* pointer to value */
uint64_t tfd_settime_ovalue; /* pointer to old value, if any */
} timerfd_settime_t;
#ifndef _KERNEL
extern int timerfd_create(int, int);
extern int timerfd_settime(int, int,
const struct itimerspec *, struct itimerspec *);
extern int timerfd_gettime(int, struct itimerspec *);
#else
#define TIMERFDMNRN_TIMERFD 0
#define TIMERFDMNRN_CLONE 1
#define TIMERFD_VALMAX (ULLONG_MAX - 1ULL)
/*
* Fortunately, the values for the Linux clocks that are valid for timerfd
* (namely, CLOCK_REALTIME and CLOCK_MONOTONIC) don't overlap with our values
* the same.
*/
#define TIMERFD_MONOTONIC 1 /* Linux value for CLOCK_MONOTONIC */
#endif /* _KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_TIMERFD_H */
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