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/atomic.h

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    1 /*      $NetBSD: atomic.h,v 1.10.10.1 2010/03/02 06:21:12 snj Exp $     */
    2 
    3 /*-
    4  * Copyright (c) 2007, 2008 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Jason R. Thorpe.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   29  * POSSIBILITY OF SUCH DAMAGE.
   30  */
   31 
   32 #ifndef _SYS_ATOMIC_H_
   33 #define _SYS_ATOMIC_H_
   34 
   35 #include <sys/types.h>
   36 #if !defined(_KERNEL) && !defined(_STANDALONE)
   37 #include <stdint.h>
   38 #endif
   39 
   40 __BEGIN_DECLS
   41 /*
   42  * Atomic ADD
   43  */
   44 void            atomic_add_32(volatile uint32_t *, int32_t);
   45 void            atomic_add_int(volatile unsigned int *, int);
   46 void            atomic_add_long(volatile unsigned long *, long);
   47 void            atomic_add_ptr(volatile void *, ssize_t);
   48 void            atomic_add_64(volatile uint64_t *, int64_t);
   49 
   50 uint32_t        atomic_add_32_nv(volatile uint32_t *, int32_t);
   51 unsigned int    atomic_add_int_nv(volatile unsigned int *, int);
   52 unsigned long   atomic_add_long_nv(volatile unsigned long *, long);
   53 void *          atomic_add_ptr_nv(volatile void *, ssize_t);
   54 uint64_t        atomic_add_64_nv(volatile uint64_t *, int64_t);
   55 
   56 /*
   57  * Atomic AND
   58  */
   59 void            atomic_and_32(volatile uint32_t *, uint32_t);
   60 void            atomic_and_uint(volatile unsigned int *, unsigned int);
   61 void            atomic_and_ulong(volatile unsigned long *, unsigned long);
   62 void            atomic_and_64(volatile uint64_t *, uint64_t);
   63 
   64 uint32_t        atomic_and_32_nv(volatile uint32_t *, uint32_t);
   65 unsigned int    atomic_and_uint_nv(volatile unsigned int *, unsigned int);
   66 unsigned long   atomic_and_ulong_nv(volatile unsigned long *, unsigned long);
   67 uint64_t        atomic_and_64_nv(volatile uint64_t *, uint64_t);
   68 
   69 /*
   70  * Atomic OR
   71  */
   72 void            atomic_or_32(volatile uint32_t *, uint32_t);
   73 void            atomic_or_uint(volatile unsigned int *, unsigned int);
   74 void            atomic_or_ulong(volatile unsigned long *, unsigned long);
   75 void            atomic_or_64(volatile uint64_t *, uint64_t);
   76 
   77 uint32_t        atomic_or_32_nv(volatile uint32_t *, uint32_t);
   78 unsigned int    atomic_or_uint_nv(volatile unsigned int *, unsigned int);
   79 unsigned long   atomic_or_ulong_nv(volatile unsigned long *, unsigned long);
   80 uint64_t        atomic_or_64_nv(volatile uint64_t *, uint64_t);
   81 
   82 /*
   83  * Atomic COMPARE-AND-SWAP
   84  */
   85 uint32_t        atomic_cas_32(volatile uint32_t *, uint32_t, uint32_t);
   86 unsigned int    atomic_cas_uint(volatile unsigned int *, unsigned int,
   87                                 unsigned int);
   88 unsigned long   atomic_cas_ulong(volatile unsigned long *, unsigned long,
   89                                  unsigned long);
   90 void *          atomic_cas_ptr(volatile void *, void *, void *);
   91 uint64_t        atomic_cas_64(volatile uint64_t *, uint64_t, uint64_t);
   92 
   93 /*
   94  * Non-interlocked atomic COMPARE-AND-SWAP.
   95  */
   96 uint32_t        atomic_cas_32_ni(volatile uint32_t *, uint32_t, uint32_t);
   97 unsigned int    atomic_cas_uint_ni(volatile unsigned int *, unsigned int,
   98                                    unsigned int);
   99 unsigned long   atomic_cas_ulong_ni(volatile unsigned long *, unsigned long,
  100                                     unsigned long);
  101 void *          atomic_cas_ptr_ni(volatile void *, void *, void *);
  102 uint64_t        atomic_cas_64_ni(volatile uint64_t *, uint64_t, uint64_t);
  103 
  104 /*
  105  * Atomic SWAP
  106  */
  107 uint32_t        atomic_swap_32(volatile uint32_t *, uint32_t);
  108 unsigned int    atomic_swap_uint(volatile unsigned int *, unsigned int);
  109 unsigned long   atomic_swap_ulong(volatile unsigned long *, unsigned long);
  110 void *          atomic_swap_ptr(volatile void *, void *);
  111 uint64_t        atomic_swap_64(volatile uint64_t *, uint64_t);
  112 
  113 /*
  114  * Atomic DECREMENT
  115  */
  116 void            atomic_dec_32(volatile uint32_t *);
  117 void            atomic_dec_uint(volatile unsigned int *);
  118 void            atomic_dec_ulong(volatile unsigned long *);
  119 void            atomic_dec_ptr(volatile void *);
  120 void            atomic_dec_64(volatile uint64_t *);
  121 
  122 uint32_t        atomic_dec_32_nv(volatile uint32_t *);
  123 unsigned int    atomic_dec_uint_nv(volatile unsigned int *);
  124 unsigned long   atomic_dec_ulong_nv(volatile unsigned long *);
  125 void *          atomic_dec_ptr_nv(volatile void *);
  126 uint64_t        atomic_dec_64_nv(volatile uint64_t *);
  127 
  128 /*
  129  * Atomic INCREMENT
  130  */
  131 void            atomic_inc_32(volatile uint32_t *);
  132 void            atomic_inc_uint(volatile unsigned int *);
  133 void            atomic_inc_ulong(volatile unsigned long *);
  134 void            atomic_inc_ptr(volatile void *);
  135 void            atomic_inc_64(volatile uint64_t *);
  136 
  137 uint32_t        atomic_inc_32_nv(volatile uint32_t *);
  138 unsigned int    atomic_inc_uint_nv(volatile unsigned int *);
  139 unsigned long   atomic_inc_ulong_nv(volatile unsigned long *);
  140 void *          atomic_inc_ptr_nv(volatile void *);
  141 uint64_t        atomic_inc_64_nv(volatile uint64_t *);
  142 
  143 /*
  144  * Memory barrier operations
  145  */
  146 void            membar_enter(void);
  147 void            membar_exit(void);
  148 void            membar_producer(void);
  149 void            membar_consumer(void);
  150 void            membar_sync(void);
  151 
  152 __END_DECLS
  153 
  154 #endif /* ! _SYS_ATOMIC_H_ */

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