1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2020 Val Packett 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #ifndef _SYS_EVENTFD_H_ 29 #define _SYS_EVENTFD_H_ 30 31 #include <sys/types.h> 32 33 typedef uint64_t eventfd_t; 34 35 #define EFD_SEMAPHORE 0x00000001 36 #define EFD_NONBLOCK 0x00000004 37 #define EFD_CLOEXEC 0x00100000 38 39 #ifdef _KERNEL 40 41 int eventfd_create_file(struct thread *td, struct file *fp, uint32_t initval, 42 int flags); 43 44 #else 45 46 __BEGIN_DECLS 47 int eventfd(unsigned int initval, int flags); 48 int eventfd_read(int fd, eventfd_t *value); 49 int eventfd_write(int fd, eventfd_t value); 50 __END_DECLS 51 52 #endif /* !_KERNEL */ 53 54 #endif /* !_SYS_EVENTFD_H_ */ 55