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/*
* linux/include/asm-arm/semaphore.h
*/
#ifndef __ASM_ARM_SEMAPHORE_H
#define __ASM_ARM_SEMAPHORE_H
#include <linux/linkage.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
#include <asm/atomic.h>
struct semaphore {
atomic_t count;
int sleepers;
wait_queue_head_t wait;
};
#define __SEMAPHORE_INIT(name,count) \
{ ATOMIC_INIT(count), 0, \
__WAIT_QUEUE_HEAD_INITIALIZER((name).wait) }
#define __MUTEX_INITIALIZER(name) \
__SEMAPHORE_INIT(name,1)
#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
struct semaphore name = __SEMAPHORE_INIT(name,count)
#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
#define DECLARE_MUTEX_LOCKED(name) __DECLARE_SEMAPHORE_GENERIC(name,0)
#define sema_init(sem, val) \
do { \
atomic_set(&((sem)->count), (val)); \
(sem)->sleepers = 0; \
init_waitqueue_head(&(sem)->wait); \
} while (0)
static inline void init_MUTEX(struct semaphore *sem)
{
sema_init(sem, 1);
}
static inline void init_MUTEX_LOCKED(struct semaphore *sem)
{
sema_init(sem, 0);
}
asmlinkage void __down_failed (void /* special register calling convention */);
asmlinkage int __down_interruptible_failed (void /* special register calling convention */);
asmlinkage int __down_trylock_failed(void /* params in registers */);
asmlinkage void __up_wakeup (void /* special register calling convention */);
extern void __down(struct semaphore * sem);
extern int __down_interruptible(struct semaphore * sem);
extern int __down_trylock(struct semaphore * sem);
extern void __up(struct semaphore * sem);
extern spinlock_t semaphore_wake_lock;
#include <asm/proc/semaphore.h>
#endif
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