#ifndef KERNEL_Spinlock_H
#define KERNEL_Spinlock_H

#include <proc.h>
#include <stdbool.h>
#include <stdint.h>

typedef struct {
    volatile uint32_t v; // 0 = unlocked, 1 = locked
    Cpu              *cpu;
} spinlock_t;

uint32_t push_off(void);
uint32_t pop_off(void);

void spinlock_init(spinlock_t *l);
bool spin_trylock(spinlock_t *l);
void spin_unlock(spinlock_t *l);
bool spin_is_holding(spinlock_t *l);
void spin_lock(spinlock_t *l);

#endif