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1 | /* |
1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #ifndef __WAITQ_H__ |
29 | #ifndef __WAITQ_H__ |
30 | #define __WAITQ_H__ |
30 | #define __WAITQ_H__ |
31 | 31 | ||
32 | #include <arch/types.h> |
32 | #include <arch/types.h> |
33 | #include <typedefs.h> |
33 | #include <typedefs.h> |
34 | #include <synch/spinlock.h> |
34 | #include <synch/spinlock.h> |
35 | #include <synch/synch.h> |
35 | #include <synch/synch.h> |
36 | #include <adt/list.h> |
36 | #include <adt/list.h> |
37 | 37 | ||
38 | #define WAKEUP_FIRST 0 |
38 | #define WAKEUP_FIRST 0 |
39 | #define WAKEUP_ALL 1 |
39 | #define WAKEUP_ALL 1 |
40 | 40 | ||
41 | /** Wait queue structure. */ |
41 | /** Wait queue structure. */ |
42 | struct waitq { |
42 | struct waitq { |
43 | 43 | ||
44 | /** Lock protecting wait queue structure. |
44 | /** Lock protecting wait queue structure. |
45 | * |
45 | * |
46 | * Must be acquired before T.lock for each T of type thread_t. |
46 | * Must be acquired before T.lock for each T of type thread_t. |
47 | */ |
47 | */ |
48 | SPINLOCK_DECLARE(lock); |
48 | SPINLOCK_DECLARE(lock); |
49 | 49 | ||
50 | int missed_wakeups; /**< Number of waitq_wakeup() calls that didn't find a thread to wake up. */ |
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. */ |
51 | link_t head; /**< List of sleeping threads for wich there was no missed_wakeup. */ |
52 | }; |
52 | }; |
53 | 53 | ||
54 | #define waitq_sleep(wq) \ |
54 | #define waitq_sleep(wq) \ |
55 | waitq_sleep_timeout((wq),SYNCH_NO_TIMEOUT,SYNCH_BLOCKING) |
55 | waitq_sleep_timeout((wq),SYNCH_NO_TIMEOUT,SYNCH_BLOCKING) |
56 | 56 | ||
57 | extern void waitq_initialize(waitq_t *wq); |
57 | extern void waitq_initialize(waitq_t *wq); |
58 | extern int waitq_sleep_timeout(waitq_t *wq, __u32 usec, int nonblocking); |
58 | extern int waitq_sleep_timeout(waitq_t *wq, __u32 usec, int nonblocking); |
59 | extern void waitq_wakeup(waitq_t *wq, bool all); |
59 | extern void waitq_wakeup(waitq_t *wq, bool all); |
60 | extern void _waitq_wakeup_unsafe(waitq_t *wq, bool all); |
60 | extern void _waitq_wakeup_unsafe(waitq_t *wq, bool all); |
61 | extern void waitq_interrupt_sleep(thread_t *t); |
61 | extern void waitq_interrupt_sleep(thread_t *t); |
62 | 62 | ||
63 | #endif |
63 | #endif |
64 | 64 |