1 /* 2 * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef _OPENSOLARIS_SYS_MUTEX_H_ 30 #define _OPENSOLARIS_SYS_MUTEX_H_ 31 32 typedef struct sx kmutex_t; 33 34 #include <sys/param.h> 35 #include <sys/lock.h> 36 #include_next <sys/sdt.h> 37 #include_next <sys/mutex.h> 38 #include <sys/proc.h> 39 #include <sys/sx.h> 40 41 typedef enum { 42 MUTEX_DEFAULT = 0 /* kernel default mutex */ 43 } kmutex_type_t; 44 45 #define MUTEX_HELD(x) (mutex_owned(x)) 46 #define MUTEX_NOT_HELD(x) (!mutex_owned(x) || panicstr) 47 48 #ifndef OPENSOLARIS_WITNESS 49 #define MUTEX_FLAGS (SX_DUPOK | SX_NEW | SX_NOWITNESS) 50 #else 51 #define MUTEX_FLAGS (SX_DUPOK | SX_NEW) 52 #endif 53 54 #define mutex_init(lock, desc, type, arg) do { \ 55 const char *_name; \ 56 ASSERT((type) == MUTEX_DEFAULT); \ 57 for (_name = #lock; *_name != '\0'; _name++) { \ 58 if (*_name >= 'a' && *_name <= 'z') \ 59 break; \ 60 } \ 61 if (*_name == '\0') \ 62 _name = #lock; \ 63 sx_init_flags((lock), _name, MUTEX_FLAGS); \ 64 } while (0) 65 #define mutex_destroy(lock) sx_destroy(lock) 66 #define mutex_enter(lock) sx_xlock(lock) 67 #define mutex_enter_interruptible(lock) sx_xlock_sig(lock) 68 #define mutex_enter_nested(lock, type) sx_xlock(lock) 69 #define mutex_tryenter(lock) sx_try_xlock(lock) 70 #define mutex_exit(lock) sx_xunlock(lock) 71 #define mutex_owned(lock) sx_xlocked(lock) 72 #define mutex_owner(lock) sx_xholder(lock) 73 #endif /* _OPENSOLARIS_SYS_MUTEX_H_ */ 74