mutex.h

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    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_nested(lock, type)  sx_xlock(lock)
   68 #define mutex_tryenter(lock)    sx_try_xlock(lock)
   69 #define mutex_exit(lock)        sx_xunlock(lock)
   70 #define mutex_owned(lock)       sx_xlocked(lock)
   71 #define mutex_owner(lock)       sx_xholder(lock)
   72 #endif  /* _OPENSOLARIS_SYS_MUTEX_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/contrib/openzfs/include/os/freebsd/spl/sys/mutex.h

FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/os/freebsd/spl/sys/mutex.h