1 | /*- |
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2 | * Copyright (c) 2007 Attilio Rao <attilio@freebsd.org> |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice(s), this list of conditions and the following disclaimer as |
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10 | * the first lines of this file unmodified other than the possible |
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11 | * addition of one or more copyright notices. |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice(s), this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY |
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17 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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18 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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19 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY |
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20 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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21 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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22 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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23 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
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26 | * DAMAGE. |
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27 | * |
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28 | * $FreeBSD$ |
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29 | */ |
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30 | |
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31 | #ifndef _SYS__SX_H_ |
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32 | #define _SYS__SX_H_ |
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33 | #ifdef __rtems__ |
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34 | #include <machine/rtems-bsd-rwlock.h> |
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35 | #endif /* __rtems__ */ |
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36 | |
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37 | /* |
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38 | * Shared/exclusive lock main structure definition. |
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39 | */ |
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40 | struct sx { |
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41 | struct lock_object lock_object; |
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42 | #ifndef __rtems__ |
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43 | volatile uintptr_t sx_lock; |
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44 | #else /* __rtems__ */ |
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45 | rtems_bsd_rwlock rwlock; |
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46 | #endif /* __rtems__ */ |
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47 | }; |
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48 | |
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49 | #endif /* !_SYS__SX_H_ */ |
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