// file    : core/timer.c
// project : Salis-VM
// author  : Paul Oliver <contact@pauloliver.dev>

#include <assert.h>
#include <stdbool.h>
#include <stdint.h>
#include <threads.h>
#include <zlib.h>

#include "arch_spec.h"
#include "arch_inst.h"
#include "compress.h"
#include "salis.h"
#include "timer.h"

void timer_reset(struct Timer *timer) {
    assert(timer);
    clock_gettime(CLOCK_MONOTONIC_COARSE, &timer->time_start);
    timer->time_delta = 0.f;
}

void timer_measure(struct Timer *timer) {
    assert(timer);
    struct timespec time_end;
    clock_gettime(CLOCK_MONOTONIC_COARSE, &time_end);
    timer->time_delta = (float)(time_end.tv_sec - timer->time_start.tv_sec);
    timer->time_delta += (float)(time_end.tv_nsec - timer->time_start.tv_nsec) / 1000000000.f;
}

void timer_sps_reset(struct TimerSPS *timer_sps) {
    assert(timer_sps);
    timer_reset(&timer_sps->timer);
    timer_sps->step_start = g_step;
    timer_sps->steps_per_sec = 0.f;
}

void timer_sps_measure(struct TimerSPS *timer_sps) {
    assert(timer_sps);
    timer_measure(&timer_sps->timer);
    float step_delta = (float)(g_step - timer_sps->step_start);
    timer_sps->steps_per_sec = step_delta / timer_sps->timer.time_delta;
}