1 /* 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2022 Rob Wing 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 REGENTS 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 REGENTS 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 #include <sys/param.h> 29 #include <sys/lock.h> 30 #include <sys/sx.h> 31 #include <sys/event.h> 32 33 #include <sys/freebsd_event.h> 34 35 static void 36 knlist_sx_xlock(void *arg) 37 { 38 39 sx_xlock((struct sx *)arg); 40 } 41 42 static void 43 knlist_sx_xunlock(void *arg) 44 { 45 46 sx_xunlock((struct sx *)arg); 47 } 48 49 static void 50 knlist_sx_assert_lock(void *arg, int what) 51 { 52 53 if (what == LA_LOCKED) 54 sx_assert((struct sx *)arg, SX_LOCKED); 55 else 56 sx_assert((struct sx *)arg, SX_UNLOCKED); 57 } 58 59 void 60 knlist_init_sx(struct knlist *knl, struct sx *lock) 61 { 62 63 knlist_init(knl, lock, knlist_sx_xlock, knlist_sx_xunlock, 64 knlist_sx_assert_lock); 65 } 66