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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 | /** @addtogroup sync |
29 | /** @addtogroup sync |
| 30 | * @{ |
30 | * @{ |
| 31 | */ |
31 | */ |
| 32 | /** @file |
32 | /** @file |
| 33 | */ |
33 | */ |
| 34 | 34 | ||
| 35 | #ifndef KERN_WAITQ_H_ |
35 | #ifndef KERN_WAITQ_H_ |
| 36 | #define KERN_WAITQ_H_ |
36 | #define KERN_WAITQ_H_ |
| 37 | 37 | ||
| 38 | #include <arch/types.h> |
38 | #include <arch/types.h> |
| 39 | #include <synch/spinlock.h> |
39 | #include <synch/spinlock.h> |
| 40 | #include <synch/synch.h> |
40 | #include <synch/synch.h> |
| 41 | #include <adt/list.h> |
41 | #include <adt/list.h> |
| 42 | 42 | ||
| - | 43 | typedef enum { |
|
| 43 | #define WAKEUP_FIRST 0 |
44 | WAKEUP_FIRST = 0, |
| 44 | #define WAKEUP_ALL 1 |
45 | WAKEUP_ALL |
| - | 46 | } wakeup_mode_t; |
|
| 45 | 47 | ||
| 46 | /** Wait queue structure. */ |
48 | /** Wait queue structure. */ |
| 47 | typedef struct { |
49 | typedef struct { |
| 48 | 50 | ||
| 49 | /** Lock protecting wait queue structure. |
51 | /** Lock protecting wait queue structure. |
| 50 | * |
52 | * |
| 51 | * Must be acquired before T.lock for each T of type thread_t. |
53 | * Must be acquired before T.lock for each T of type thread_t. |
| 52 | */ |
54 | */ |
| 53 | SPINLOCK_DECLARE(lock); |
55 | SPINLOCK_DECLARE(lock); |
| 54 | 56 | ||
| 55 | /** |
57 | /** |
| 56 | * Number of waitq_wakeup() calls that didn't find a thread to wake up. |
58 | * Number of waitq_wakeup() calls that didn't find a thread to wake up. |
| 57 | */ |
59 | */ |
| 58 | int missed_wakeups; |
60 | int missed_wakeups; |
| 59 | /** List of sleeping threads for wich there was no missed_wakeup. */ |
61 | /** List of sleeping threads for wich there was no missed_wakeup. */ |
| 60 | link_t head; |
62 | link_t head; |
| 61 | } waitq_t; |
63 | } waitq_t; |
| 62 | 64 | ||
| 63 | #define waitq_sleep(wq) \ |
65 | #define waitq_sleep(wq) \ |
| 64 | waitq_sleep_timeout((wq), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE) |
66 | waitq_sleep_timeout((wq), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE) |
| 65 | 67 | ||
| 66 | struct thread; |
68 | struct thread; |
| 67 | 69 | ||
| 68 | extern void waitq_initialize(waitq_t *wq); |
70 | extern void waitq_initialize(waitq_t *wq); |
| 69 | extern int waitq_sleep_timeout(waitq_t *wq, uint32_t usec, int flags); |
71 | extern int waitq_sleep_timeout(waitq_t *wq, uint32_t usec, int flags); |
| 70 | extern ipl_t waitq_sleep_prepare(waitq_t *wq); |
72 | extern ipl_t waitq_sleep_prepare(waitq_t *wq); |
| 71 | extern int waitq_sleep_timeout_unsafe(waitq_t *wq, uint32_t usec, int flags); |
73 | extern int waitq_sleep_timeout_unsafe(waitq_t *wq, uint32_t usec, int flags); |
| 72 | extern void waitq_sleep_finish(waitq_t *wq, int rc, ipl_t ipl); |
74 | extern void waitq_sleep_finish(waitq_t *wq, int rc, ipl_t ipl); |
| 73 | extern void waitq_wakeup(waitq_t *wq, bool all); |
75 | extern void waitq_wakeup(waitq_t *wq, wakeup_mode_t mode); |
| 74 | extern void _waitq_wakeup_unsafe(waitq_t *wq, bool all); |
76 | extern void _waitq_wakeup_unsafe(waitq_t *wq, wakeup_mode_t mode); |
| 75 | extern void waitq_interrupt_sleep(struct thread *t); |
77 | extern void waitq_interrupt_sleep(struct thread *t); |
| 76 | 78 | ||
| 77 | #endif |
79 | #endif |
| 78 | 80 | ||
| 79 | /** @} |
81 | /** @} |
| 80 | */ |
82 | */ |
| 81 | 83 | ||