1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2002 Alfred Perlstein <alfred@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef _POSIX4_KSEM_H_ 30 #define _POSIX4_KSEM_H_ 31 32 #if !defined(_KERNEL) && !defined(_WANT_FILE) 33 #error "no user-serviceable parts inside" 34 #endif 35 36 #include <sys/condvar.h> 37 38 struct ksem { 39 int ks_ref; /* number of references */ 40 mode_t ks_mode; /* protection bits */ 41 uid_t ks_uid; /* creator uid */ 42 gid_t ks_gid; /* creator gid */ 43 unsigned int ks_value; /* current value */ 44 struct cv ks_cv; /* waiters sleep here */ 45 int ks_waiters; /* number of waiters */ 46 int ks_flags; 47 48 /* 49 * Values maintained solely to make this a better-behaved file 50 * descriptor for fstat() to run on. 51 * 52 * XXX: dubious 53 */ 54 struct timespec ks_atime; 55 struct timespec ks_mtime; 56 struct timespec ks_ctime; 57 struct timespec ks_birthtime; 58 59 struct label *ks_label; /* MAC label */ 60 const char *ks_path; 61 }; 62 63 #define KS_ANONYMOUS 0x0001 /* Anonymous (unnamed) semaphore. */ 64 #define KS_DEAD 0x0002 /* No new waiters allowed. */ 65 66 #endif /* !_POSIX4_KSEM_H_ */ 67