_smr.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2019, 2020 Jeffrey Roberson <jeff@FreeBSD.org>
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice unmodified, this list of conditions, and the following
   11  *    disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   26  *
   27  * $FreeBSD$
   28  *
   29  */
   30 
   31 #ifndef _SYS__SMR_H_
   32 #define _SYS__SMR_H_
   33 
   34 typedef uint32_t        smr_seq_t;
   35 typedef int32_t         smr_delta_t;
   36 typedef struct smr      *smr_t;
   37 
   38 #define SMR_ENTERED(smr)                                                \
   39     (curthread->td_critnest != 0 && zpcpu_get((smr))->c_seq != SMR_SEQ_INVALID)
   40 
   41 #define SMR_ASSERT_ENTERED(smr)                                         \
   42     KASSERT(SMR_ENTERED(smr), ("Not in smr section"))
   43 
   44 #define SMR_ASSERT_NOT_ENTERED(smr)                                     \
   45     KASSERT(!SMR_ENTERED(smr), ("In smr section."));
   46 
   47 #define SMR_ASSERT(ex, fn)                                              \
   48     KASSERT((ex), (fn ": Assertion " #ex " failed at %s:%d", __FILE__, __LINE__))
   49 
   50 #endif  /* __SYS_SMR_H_ */

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

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