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/*

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

 *

 * Copyright (c) 1996 Russell King.

 *

 * Changelog:

 *  27-06-1996  RMK     Created

 *  13-04-1997  RMK     Made functions atomic

 */

#ifndef __ASM_ARM_ATOMIC_H

#define __ASM_ARM_ATOMIC_H

#include <asm/system.h>

typedef int atomic_t;

extern __inline__ void atomic_add(atomic_t i, atomic_t *v)

{

        unsigned long flags;

        save_flags_cli (flags);

        *v += i;

        restore_flags (flags);

}

extern __inline__ void atomic_sub(atomic_t i, atomic_t *v)

{

        unsigned long flags;

        save_flags_cli (flags);

        *v -= i;

        restore_flags (flags);

}

extern __inline__ void atomic_inc(atomic_t *v)

{

        unsigned long flags;

        save_flags_cli (flags);

        *v += 1;

        restore_flags (flags);

}

extern __inline__ void atomic_dec(atomic_t *v)

{

        unsigned long flags;

        save_flags_cli (flags);

        *v -= 1;

        restore_flags (flags);

}

extern __inline__ int atomic_dec_and_test(atomic_t *v)

{

        unsigned long flags;

        int result;

        save_flags_cli (flags);

        *v -= 1;

        result = (*v == 0);

        restore_flags (flags);

        return result;

}

#endif