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| Rev | Author | Line No. | Line |
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| 1 | jermar | 1 | /* |
| 2 | * Copyright (C) 2001-2004 Jakub Jermar |
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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 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #ifndef __SEMAPHORE_H__ |
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| 30 | #define __SEMAPHORE_H__ |
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| 31 | |||
| 32 | #include <arch/types.h> |
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| 33 | #include <typedefs.h> |
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| 34 | #include <synch/waitq.h> |
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| 35 | #include <synch/synch.h> |
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| 36 | |||
| 37 | struct semaphore |
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| 38 | { |
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| 125 | jermar | 39 | waitq_t wq; |
| 1 | jermar | 40 | }; |
| 41 | |||
| 42 | #define semaphore_down(s) \ |
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| 43 | _semaphore_down_timeout((s),SYNCH_NO_TIMEOUT,SYNCH_BLOCKING) |
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| 44 | #define semaphore_trydown(s) \ |
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| 45 | _semaphore_down_timeout((s),SYNCH_NO_TIMEOUT,SYNCH_NON_BLOCKING) |
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| 46 | #define semaphore_down_timeout(s,usec) \ |
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| 47 | _semaphore_down_timeout((s),(usec),SYNCH_NON_BLOCKING) |
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| 48 | |||
| 49 | extern void semaphore_initialize(semaphore_t *s, int val); |
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| 50 | extern int _semaphore_down_timeout(semaphore_t *s, __u32 usec, int trydown); |
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| 51 | extern void semaphore_up(semaphore_t *s); |
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| 52 | |||
| 53 | #endif |