sys/arch/usermode/include/lock.h

   1 /* $NetBSD: lock.h,v 1.1 2007/12/29 14:38:34 jmcneill Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2007 Jared D. McNeill <jmcneill@invisible.ca>
   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, this list of conditions and the following 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #ifndef _ARCH_USERMODE_INCLUDE_LOCK_H
  30 #define _ARCH_USERMODE_INCLUDE_LOCK_H
  31
  32 __inline static void
  33 __cpu_simple_lock_init(__cpu_simple_lock_t *lockp)
  34 {
  35 }
  36
  37 __inline static void
  38 __cpu_simple_lock(__cpu_simple_lock_t *lockp)
  39 {
  40 }
  41
  42 __inline static void
  43 __cpu_simple_unlock(__cpu_simple_lock_t *lockp)
  44 {
  45 }
  46
  47 __inline static int
  48 __SIMPLELOCK_LOCKED_P(__cpu_simple_lock_t *lockp)
  49 {
  50         return *lockp == __SIMPLELOCK_LOCKED;
  51 }
  52
  53 __inline static int
  54 __SIMPLELOCK_UNLOCKED_P(__cpu_simple_lock_t *lockp)
  55 {
  56         return *lockp == __SIMPLELOCK_UNLOCKED;
  57 }
  58
  59 __inline static int
  60 __cpu_simple_lock_try(__cpu_simple_lock_t *lockp)
  61 {
  62         return __SIMPLELOCK_UNLOCKED;
  63 }
  64
  65 #endif /* !_ARCH_USERMODE_INCLUDE_LOCK_H */