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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 __WAITQ_H__ |
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30 | #define __WAITQ_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/spinlock.h> |
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35 | #include <synch/synch.h> |
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788 | jermar | 36 | #include <adt/list.h> |
1 | jermar | 37 | |
38 | #define WAKEUP_FIRST 0 |
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39 | #define WAKEUP_ALL 1 |
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40 | |||
557 | jermar | 41 | /** Wait queue structure. */ |
1 | jermar | 42 | struct waitq { |
557 | jermar | 43 | |
44 | /** Lock protecting wait queue structure. |
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45 | * |
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46 | * Must be acquired before T.lock for each T of type thread_t. |
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47 | */ |
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623 | jermar | 48 | SPINLOCK_DECLARE(lock); |
557 | jermar | 49 | |
410 | jermar | 50 | int missed_wakeups; /**< Number of waitq_wakeup() calls that didn't find a thread to wake up. */ |
51 | link_t head; /**< List of sleeping threads for wich there was no missed_wakeup. */ |
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1 | jermar | 52 | }; |
53 | |||
54 | #define waitq_sleep(wq) \ |
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55 | waitq_sleep_timeout((wq),SYNCH_NO_TIMEOUT,SYNCH_BLOCKING) |
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56 | |||
57 | extern void waitq_initialize(waitq_t *wq); |
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58 | extern int waitq_sleep_timeout(waitq_t *wq, __u32 usec, int nonblocking); |
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557 | jermar | 59 | extern void waitq_wakeup(waitq_t *wq, bool all); |
60 | extern void _waitq_wakeup_unsafe(waitq_t *wq, bool all); |
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1156 | jermar | 61 | extern void waitq_interrupt_sleep(thread_t *t); |
1 | jermar | 62 | |
63 | #endif |