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/*

 * linux/include/asm-arm/semaphore.h

 *

 *

 */

#ifndef __ASM_ARM_SEMAPHORE_H

#define __ASM_ARM_SEMAPHORE_H

#include <linux/linkage.h>

struct semaphore {

        int count;

        int waking;

        int lock;

        struct wait_queue * wait;

};

#define MUTEX ((struct semaphore) { 1, 0, 0, NULL })

#define MUTEX_LOCKED ((struct semaphore) { 0, 0, 0, NULL })

extern void __down (struct semaphore *sem);

extern void __up (struct semaphore *sem);

extern int __down_interruptible (struct semaphore *sem);

/* Primitives to spin on a lock.  Needed only for SMP version.

 */

extern inline void get_buzz_lock (int *lock_ptr)

{

#ifdef __SMP__

        while (xchg(lock_ptr,1) != 0);

#endif

}

extern inline void give_buzz_lock (int *lock_ptr)

{

#ifdef __SMP__

        *lock_ptr = 0;

#endif

}

#ifdef __arm__

#include <asm/proc/semaphore.h>

#endif

#endif