mango/include/kernel/locks.h

#ifndef KERNEL_LOCKS_H_
#define KERNEL_LOCKS_H_

#include <kernel/compiler.h>
#include <kernel/machine/hwlock.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef __aligned(8) ml_hwlock_t spin_lock_t;

#define SPIN_LOCK_INIT                ML_HWLOCK_INIT

#define spin_lock(lck)                ml_hwlock_lock(lck);
#define spin_unlock(lck)              ml_hwlock_unlock(lck);

#define spin_lock_irq(lck)            ml_hwlock_lock_irq(lck);
#define spin_unlock_irq(lck)          ml_hwlock_unlock_irq(lck);

#define spin_lock_irqsave(lck, flags) ml_hwlock_lock_irqsave(lck, flags);
#define spin_unlock_irqrestore(lck, flags)                                     \
	ml_hwlock_unlock_irqrestore(lck, flags);

static inline void spin_lock_pair_irqsave(
	spin_lock_t *a,
	spin_lock_t *b,
	unsigned long *flags)
{
	if (a == b) {
		spin_lock_irqsave(a, flags);
	} else if (a < b) {
		spin_lock_irqsave(a, flags);
		spin_lock(b);
	} else {
		spin_lock_irqsave(b, flags);
		spin_lock(a);
	}
}

static inline void spin_unlock_pair_irqrestore(
	spin_lock_t *a,
	spin_lock_t *b,
	unsigned long flags)
{
	if (a == b) {
		spin_unlock_irqrestore(a, flags);
	} else if (a < b) {
		spin_unlock(b);
		spin_unlock_irqrestore(a, flags);
	} else {
		spin_unlock(a);
		spin_unlock_irqrestore(b, flags);
	}
}

#ifdef __cplusplus
}
#endif

#endif