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 __MUTEX_INITIALIZER(name) \
22 __SEMAPHORE_INITIALIZER (name,1)
24 #define __DECLARE_SEMAPHORE_GENERIC(name,count) \
25 struct semaphore name = __SEMAPHORE_INITIALIZER (name,count)
27 #define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC (name,1)
28 #define DECLARE_MUTEX_LOCKED(name) __DECLARE_SEMAPHORE_GENERIC (name,0)
30 extern inline void sema_init (struct semaphore *sem, int val)
32 *sem = (struct semaphore)__SEMAPHORE_INITIALIZER((*sem),val);
35 static inline void init_MUTEX (struct semaphore *sem)
40 static inline void init_MUTEX_LOCKED (struct semaphore *sem)
46 * special register calling convention
48 asmlinkage void __down_failed (void);
49 asmlinkage int __down_interruptible_failed (void);
50 asmlinkage int __down_trylock_failed (void);
51 asmlinkage void __up_wakeup (void);
53 extern void __down (struct semaphore * sem);
54 extern int __down_interruptible (struct semaphore * sem);
55 extern int __down_trylock (struct semaphore * sem);
56 extern void __up (struct semaphore * sem);
58 extern inline void down (struct semaphore * sem)
61 if (atomic_dec_return (&sem->count) < 0)
65 extern inline int down_interruptible (struct semaphore * sem)
69 if (atomic_dec_return (&sem->count) < 0)
70 ret = __down_interruptible (sem);
74 extern inline int down_trylock (struct semaphore *sem)
77 if (atomic_dec_return (&sem->count) < 0)
78 ret = __down_trylock (sem);
82 extern inline void up (struct semaphore * sem)
84 if (atomic_inc_return (&sem->count) <= 0)
88 #endif /* __V850_SEMAPHORE_H__ */