Rev 115 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
Rev 115 | Rev 195 | ||
---|---|---|---|
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 | #include <synch/synch.h> |
29 | #include <synch/synch.h> |
30 | #include <synch/semaphore.h> |
30 | #include <synch/semaphore.h> |
31 | #include <synch/waitq.h> |
31 | #include <synch/waitq.h> |
32 | #include <synch/spinlock.h> |
32 | #include <synch/spinlock.h> |
33 | #include <arch/asm.h> |
33 | #include <arch/asm.h> |
- | 34 | #include <arch.h> |
|
34 | 35 | ||
35 | void semaphore_initialize(semaphore_t *s, int val) |
36 | void semaphore_initialize(semaphore_t *s, int val) |
36 | { |
37 | { |
37 | pri_t pri; |
38 | pri_t pri; |
38 | 39 | ||
39 | waitq_initialize(&s->wq); |
40 | waitq_initialize(&s->wq); |
40 | 41 | ||
41 | pri = cpu_priority_high(); |
42 | pri = cpu_priority_high(); |
42 | 43 | ||
43 | spinlock_lock(&s->wq.lock); |
44 | spinlock_lock(&s->wq.lock); |
44 | s->wq.missed_wakeups = val; |
45 | s->wq.missed_wakeups = val; |
45 | spinlock_unlock(&s->wq.lock); |
46 | spinlock_unlock(&s->wq.lock); |
46 | 47 | ||
47 | cpu_priority_restore(pri); |
48 | cpu_priority_restore(pri); |
48 | } |
49 | } |
49 | 50 | ||
50 | int _semaphore_down_timeout(semaphore_t *s, __u32 usec, int trydown) |
51 | int _semaphore_down_timeout(semaphore_t *s, __u32 usec, int trydown) |
51 | { |
52 | { |
52 | return waitq_sleep_timeout(&s->wq, usec, trydown); |
53 | return waitq_sleep_timeout(&s->wq, usec, trydown); |
53 | } |
54 | } |
54 | 55 | ||
55 | void semaphore_up(semaphore_t *s) |
56 | void semaphore_up(semaphore_t *s) |
56 | { |
57 | { |
57 | waitq_wakeup(&s->wq, WAKEUP_FIRST); |
58 | waitq_wakeup(&s->wq, WAKEUP_FIRST); |
58 | } |
59 | } |
59 | 60 |