The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/_umtx.h

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    1 /*-
    2  * Copyright (c) 2010, David Xu <davidxu@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 unmodified, this list of conditions, and the following
   10  *    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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/10.1/sys/sys/_umtx.h 232144 2012-02-25 02:12:17Z davidxu $
   27  *
   28  */
   29 
   30 #ifndef _SYS__UMTX_H_
   31 #define _SYS__UMTX_H_
   32 
   33 #include <sys/_types.h>
   34 #include <sys/_timespec.h>
   35 
   36 struct umtx {
   37         volatile unsigned long  u_owner;        /* Owner of the mutex. */
   38 };
   39 
   40 struct umutex {
   41         volatile __lwpid_t      m_owner;        /* Owner of the mutex */
   42         __uint32_t              m_flags;        /* Flags of the mutex */
   43         __uint32_t              m_ceilings[2];  /* Priority protect ceiling */
   44         __uint32_t              m_spare[4];
   45 };
   46 
   47 struct ucond {
   48         volatile __uint32_t     c_has_waiters;  /* Has waiters in kernel */
   49         __uint32_t              c_flags;        /* Flags of the condition variable */
   50         __uint32_t              c_clockid;      /* Clock id */
   51         __uint32_t              c_spare[1];     /* Spare space */
   52 };
   53 
   54 struct urwlock {
   55         volatile __int32_t      rw_state;
   56         __uint32_t              rw_flags;
   57         __uint32_t              rw_blocked_readers;
   58         __uint32_t              rw_blocked_writers;
   59         __uint32_t              rw_spare[4];
   60 };
   61 
   62 struct _usem {
   63         volatile __uint32_t     _has_waiters;
   64         volatile __uint32_t     _count;
   65         __uint32_t              _flags;
   66 };
   67 
   68 struct _umtx_time {
   69         struct timespec         _timeout;
   70         __uint32_t              _flags;
   71         __uint32_t              _clockid;
   72 };
   73 
   74 #endif /* !_SYS__UMTX_H_ */

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