1 #ifndef __V850_SEMAPHORE_H__
2 #define __V850_SEMAPHORE_H__
4 #include <linux/linkage.h>
5 #include <linux/spinlock.h>
6 #include <linux/wait.h>
7 #include <linux/rwsem.h>
9 #include <asm/atomic.h>
14 wait_queue_head_t wait;
17 #define __SEMAPHORE_INITIALIZER(name,count) \
18 { ATOMIC_INIT (count), 0, \
19 __WAIT_QUEUE_HEAD_INITIALIZER ((name).wait) }
21 #define __DECLARE_SEMAPHORE_GENERIC(name,count) \
22 struct semaphore name = __SEMAPHORE_INITIALIZER (name,count)
24 #define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC (name,1)
26 static inline void sema_init (struct semaphore *sem, int val)
28 *sem = (struct semaphore)__SEMAPHORE_INITIALIZER((*sem),val);
31 static inline void init_MUTEX (struct semaphore *sem)
36 static inline void init_MUTEX_LOCKED (struct semaphore *sem)
42 * special register calling convention
44 asmlinkage void __down_failed (void);
45 asmlinkage int __down_interruptible_failed (void);
46 asmlinkage int __down_trylock_failed (void);
47 asmlinkage void __up_wakeup (void);
49 extern void __down (struct semaphore * sem);
50 extern int __down_interruptible (struct semaphore * sem);
51 extern int __down_trylock (struct semaphore * sem);
52 extern void __up (struct semaphore * sem);
54 static inline void down (struct semaphore * sem)
57 if (atomic_dec_return (&sem->count) < 0)
61 static inline int down_interruptible (struct semaphore * sem)
65 if (atomic_dec_return (&sem->count) < 0)
66 ret = __down_interruptible (sem);
70 static inline int down_trylock (struct semaphore *sem)
73 if (atomic_dec_return (&sem->count) < 0)
74 ret = __down_trylock (sem);
78 static inline void up (struct semaphore * sem)
80 if (atomic_inc_return (&sem->count) <= 0)
84 #endif /* __V850_SEMAPHORE_H__ */