timer.h

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#pragma once
 
#include <kernel/cpu/interrupt.h>
#include <kernel/sync/lock.h>
 
#include <sys/proc.h>
#include <time.h>
 
typedef struct cpu cpu_t;
 
#define TIMER_MAX_CALLBACK 16
 
typedef void (*timer_callback_t)(interrupt_frame_t* frame, cpu_t* self);
 
typedef struct
{
    uint64_t apicTicksPerNs;
    clock_t nextDeadline;
    timer_callback_t callbacks[TIMER_MAX_CALLBACK];
    lock_t lock;
} timer_ctx_t;
 
void timer_ctx_init(timer_ctx_t* ctx);
 
clock_t timer_uptime(void);
 
time_t timer_unix_epoch(void);
 
void timer_interrupt_handler(interrupt_frame_t* frame, cpu_t* self);
 
void timer_subscribe(timer_ctx_t* ctx, timer_callback_t callback);
 
void timer_unsubscribe(timer_ctx_t* ctx, timer_callback_t callback);
 
void timer_one_shot(cpu_t* self, clock_t uptime, clock_t timeout);
 
void timer_notify(cpu_t* cpu);
 
void timer_notify_self(void);