| 1 | /* $NetBSD: eventfd.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_EVENTFD_H_ |
| 33 | #define _SYS_EVENTFD_H_ |
| 34 | |
| 35 | #include <sys/fcntl.h> |
| 36 | |
| 37 | /* |
| 38 | * Definitions for eventfd(2). This implementation is API compatible |
| 39 | * with the Linux eventfd(2) interface. |
| 40 | */ |
| 41 | |
| 42 | typedef uint64_t eventfd_t; |
| 43 | |
| 44 | #define EFD_SEMAPHORE O_RDWR |
| 45 | #define EFD_CLOEXEC O_CLOEXEC |
| 46 | #define EFD_NONBLOCK O_NONBLOCK |
| 47 | |
| 48 | #ifdef _KERNEL |
| 49 | struct lwp; |
| 50 | int do_eventfd(struct lwp *, unsigned int, int, register_t *); |
| 51 | #else /* ! _KERNEL */ |
| 52 | __BEGIN_DECLS |
| 53 | int eventfd(unsigned int, int); |
| 54 | int eventfd_read(int, eventfd_t *); |
| 55 | int eventfd_write(int, eventfd_t); |
| 56 | __END_DECLS |
| 57 | #endif /* _KERNEL */ |
| 58 | |
| 59 | #endif /* _SYS_EVENTFD_H_ */ |