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  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2010, David Xu <davidxu@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 unmodified, this list of conditions, and the following
   12  *    disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  *
   28  * $FreeBSD: stable/12/sys/sys/_umtx.h 326256 2017-11-27 15:01:59Z pfg $
   29  *
   30  */
   31 
   32 #ifndef _SYS__UMTX_H_
   33 #define _SYS__UMTX_H_
   34 
   35 #include <sys/_types.h>
   36 #include <sys/_timespec.h>
   37 
   38 struct umutex {
   39         volatile __lwpid_t      m_owner;        /* Owner of the mutex */
   40         __uint32_t              m_flags;        /* Flags of the mutex */
   41         __uint32_t              m_ceilings[2];  /* Priority protect ceiling */
   42         __uintptr_t             m_rb_lnk;       /* Robust linkage */
   43 #ifndef __LP64__
   44         __uint32_t              m_pad;
   45 #endif
   46         __uint32_t              m_spare[2];
   47 };
   48 
   49 struct ucond {
   50         volatile __uint32_t     c_has_waiters;  /* Has waiters in kernel */
   51         __uint32_t              c_flags;        /* Flags of the condition variable */
   52         __uint32_t              c_clockid;      /* Clock id */
   53         __uint32_t              c_spare[1];     /* Spare space */
   54 };
   55 
   56 struct urwlock {
   57         volatile __int32_t      rw_state;
   58         __uint32_t              rw_flags;
   59         __uint32_t              rw_blocked_readers;
   60         __uint32_t              rw_blocked_writers;
   61         __uint32_t              rw_spare[4];
   62 };
   63 
   64 struct _usem {
   65         volatile __uint32_t     _has_waiters;
   66         volatile __uint32_t     _count;
   67         __uint32_t              _flags;
   68 };
   69 
   70 struct _usem2 {
   71         volatile __uint32_t     _count;         /* Waiters flag in high bit. */
   72         __uint32_t              _flags;
   73 };
   74 
   75 struct _umtx_time {
   76         struct timespec         _timeout;
   77         __uint32_t              _flags;
   78         __uint32_t              _clockid;
   79 };
   80 
   81 #endif /* !_SYS__UMTX_H_ */

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