#include <kernel/spin.h>
#include <stdatomic.h>

void spin_lock(struct spinlock* spin) {
    uint32_t my = atomic_fetch_add_explicit(&spin->next, 1, memory_order_relaxed);

    while (atomic_load_explicit(&spin->owner, memory_order_acquire) != my) {
        asm volatile("pause");
    }
}

void spin_unlock(struct spinlock* spin) {
    uint32_t val = atomic_load_explicit(&spin->owner, memory_order_relaxed);
    atomic_store_explicit(&spin->owner, val + 1, memory_order_release);
}