#include <stdint.h>

#pragma once

typedef enum proc_state {
    ZOMBIE = 4,
    RUNNING = 3,
    READY = 2,
    SLEEPING = 1,
    UNUSED = 0
}proc_state;

struct context {
    uint64_t r15, r14, r13, r12, rbp, rbx, rip;
};

struct thread {
    struct thread *next;
    struct thread *prev;
    uint64_t *mem;
    uint64_t *kstack;
    proc_state state;
    uint16_t pid;
    struct context *context;
};

void scheduler_init();
[[noreturn]] void sched();
void yield();

#define PROC_MAX    512 // Max number of processes

#define INITIAL_STACK_SIZE  0x10000