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      1 /*	$NetBSD: timerfd.h,v 1.3 2021/09/21 13:51:46 ryoon Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2020 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _SYS_TIMERFD_H_
     33 #define	_SYS_TIMERFD_H_
     34 
     35 #include <sys/fcntl.h>
     36 #include <sys/ioccom.h>
     37 #include <sys/time.h>
     38 
     39 /*
     40  * Definitions for timerfd_create(2) / timerfd_gettime(2) / timerfd_settime(2).
     41  * This implementation is API compatible with the Linux interface.
     42  */
     43 
     44 #define	TFD_TIMER_ABSTIME	O_WRONLY
     45 #define	TFD_TIMER_CANCEL_ON_SET	O_RDWR
     46 #define	TFD_CLOEXEC		O_CLOEXEC
     47 #define	TFD_NONBLOCK		O_NONBLOCK
     48 
     49 #define	TFD_IOC_SET_TICKS	_IOW('T', 0, uint64_t)
     50 
     51 #ifdef _KERNEL
     52 struct lwp;
     53 int	do_timerfd_create(struct lwp *, clockid_t, int, register_t *);
     54 int	do_timerfd_gettime(struct lwp *, int, struct itimerspec *,
     55 	    register_t *);
     56 int	do_timerfd_settime(struct lwp *, int, int, const struct itimerspec *,
     57 	    struct itimerspec *, register_t *);
     58 #else /* ! _KERNEL */
     59 __BEGIN_DECLS
     60 int	timerfd_create(clockid_t, int);
     61 int	timerfd_gettime(int, struct itimerspec *);
     62 int	timerfd_settime(int, int, const struct itimerspec *,
     63 	    struct itimerspec *);
     64 __END_DECLS
     65 #endif /* _KERNEL */
     66 
     67 #endif /* _SYS_TIMERFD_H_ */
     68