1 #ifndef _SPARC64_SEMAPHORE_H
2 #define _SPARC64_SEMAPHORE_H
4 /* These are actually reasonable on the V9.
6 * See asm-ppc/semaphore.h for implementation commentary,
7 * only sparc64 specific issues are commented here.
11 #include <asm/atomic.h>
12 #include <asm/system.h>
13 #include <linux/wait.h>
14 #include <linux/rwsem.h>
18 wait_queue_head_t wait;
21 #define __SEMAPHORE_INITIALIZER(name, count) \
22 { ATOMIC_INIT(count), \
23 __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) }
25 #define __DECLARE_SEMAPHORE_GENERIC(name, count) \
26 struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
28 #define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name, 1)
29 #define DECLARE_MUTEX_LOCKED(name) __DECLARE_SEMAPHORE_GENERIC(name, 0)
31 static inline void sema_init (struct semaphore *sem, int val)
33 atomic_set(&sem->count, val);
34 init_waitqueue_head(&sem->wait);
37 static inline void init_MUTEX (struct semaphore *sem)
42 static inline void init_MUTEX_LOCKED (struct semaphore *sem)
47 extern void up(struct semaphore *sem);
48 extern void down(struct semaphore *sem);
49 extern int down_trylock(struct semaphore *sem);
50 extern int down_interruptible(struct semaphore *sem);
52 #endif /* __KERNEL__ */
54 #endif /* !(_SPARC64_SEMAPHORE_H) */