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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