1 | /* |
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2 | * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>. |
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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, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 3. Neither the name of the author nor the names of any co-contributors |
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14 | * may be used to endorse or promote products derived from this software |
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15 | * without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND |
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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27 | * SUCH DAMAGE. |
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28 | * |
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29 | * $FreeBSD$ |
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30 | * |
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31 | * Lock definitions used in both libc and libpthread. |
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32 | * |
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33 | */ |
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34 | |
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35 | #ifndef _SPINLOCK_H_ |
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36 | #define _SPINLOCK_H_ |
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37 | #include <sys/cdefs.h> |
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38 | #include <sys/types.h> |
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39 | |
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40 | /* |
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41 | * Lock structure with room for debugging information. |
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42 | */ |
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43 | struct _spinlock { |
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44 | volatile long access_lock; |
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45 | volatile long lock_owner; |
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46 | volatile char *fname; |
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47 | volatile int lineno; |
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48 | }; |
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49 | typedef struct _spinlock spinlock_t; |
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50 | |
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51 | #define _SPINLOCK_INITIALIZER { 0, 0, 0, 0 } |
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52 | |
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53 | #define _SPINUNLOCK(_lck) _spinunlock(_lck); |
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54 | #ifdef _LOCK_DEBUG |
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55 | #define _SPINLOCK(_lck) _spinlock_debug(_lck, __FILE__, __LINE__) |
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56 | #else |
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57 | #define _SPINLOCK(_lck) _spinlock(_lck) |
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58 | #endif |
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59 | |
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60 | /* |
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61 | * Thread function prototype definitions: |
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62 | */ |
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63 | __BEGIN_DECLS |
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64 | long _atomic_lock(volatile long *); |
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65 | void _spinlock(spinlock_t *); |
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66 | void _spinunlock(spinlock_t *); |
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67 | void _spinlock_debug(spinlock_t *, char *, int); |
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68 | __END_DECLS |
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69 | |
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70 | #endif /* _SPINLOCK_H_ */ |
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