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1da177e4 LT |
1 | #ifndef _SPARC64_SEMAPHORE_H |
2 | #define _SPARC64_SEMAPHORE_H | |
3 | ||
4 | /* These are actually reasonable on the V9. | |
5 | * | |
6 | * See asm-ppc/semaphore.h for implementation commentary, | |
7 | * only sparc64 specific issues are commented here. | |
8 | */ | |
9 | #ifdef __KERNEL__ | |
10 | ||
11 | #include <asm/atomic.h> | |
12 | #include <asm/system.h> | |
13 | #include <linux/wait.h> | |
14 | #include <linux/rwsem.h> | |
15 | ||
16 | struct semaphore { | |
17 | atomic_t count; | |
18 | wait_queue_head_t wait; | |
19 | }; | |
20 | ||
21 | #define __SEMAPHORE_INITIALIZER(name, count) \ | |
22 | { ATOMIC_INIT(count), \ | |
23 | __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) } | |
24 | ||
1da177e4 LT |
25 | #define __DECLARE_SEMAPHORE_GENERIC(name, count) \ |
26 | struct semaphore name = __SEMAPHORE_INITIALIZER(name,count) | |
27 | ||
28 | #define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name, 1) | |
1da177e4 LT |
29 | |
30 | static inline void sema_init (struct semaphore *sem, int val) | |
31 | { | |
32 | atomic_set(&sem->count, val); | |
33 | init_waitqueue_head(&sem->wait); | |
34 | } | |
35 | ||
36 | static inline void init_MUTEX (struct semaphore *sem) | |
37 | { | |
38 | sema_init(sem, 1); | |
39 | } | |
40 | ||
41 | static inline void init_MUTEX_LOCKED (struct semaphore *sem) | |
42 | { | |
43 | sema_init(sem, 0); | |
44 | } | |
45 | ||
46 | extern void up(struct semaphore *sem); | |
47 | extern void down(struct semaphore *sem); | |
48 | extern int down_trylock(struct semaphore *sem); | |
49 | extern int down_interruptible(struct semaphore *sem); | |
50 | ||
51 | #endif /* __KERNEL__ */ | |
52 | ||
53 | #endif /* !(_SPARC64_SEMAPHORE_H) */ |