1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2008 Attilio Rao <attilio@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(s), this list of conditions and the following disclaimer as 12 * the first lines of this file unmodified other than the possible 13 * addition of one or more copyright notices. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice(s), this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY 19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY 22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 28 * DAMAGE. 29 */ 30 31 32 // Modified to support the Haiku FAT driver. 33 34 #include "sys/param.h" 35 #include "sys/lockmgr.h" 36 #include "sys/mutex.h" 37 #include "sys/systm.h" 38 39 40 /*! @param flags LK_EXCLUSIVE or LK_SHARED by itself write- or read-locks the node, respectively. 41 LK_RELEASE in combination with LK_EXCLUSIVE or LK_SHARED write- or read-unlocks the node, 42 respectively. 43 @param ilk Ignored in the Haiku port. 44 */ 45 void 46 lockmgr(struct lock* lk, u_int flags, struct mtx* ilk) 47 { 48 if ((flags & LK_RELEASE) != 0) { 49 if ((flags & LK_SHARED) != 0) 50 rw_lock_read_unlock(&lk->haikuRW); 51 else 52 rw_lock_write_unlock(&lk->haikuRW); 53 } else if ((flags & LK_EXCLUSIVE) != 0) { 54 rw_lock_write_lock(&lk->haikuRW); 55 } else if ((flags & LK_SHARED) != 0) { 56 rw_lock_read_lock(&lk->haikuRW); 57 } else { 58 panic("unrecognized lockmgr flag\n"); 59 } 60 61 return; 62 } 63