// 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 "compress.h"
#include "salis.h"
#include "timer.h"

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

void timer_measure(struct Timer *timer) {
    assert(timer);
    uint64_t step_end = g_step;
    struct timespec time_end;
    clock_gettime(CLOCK_MONOTONIC_COARSE, &time_end);
    float step_delta = (float)(step_end - timer->step_start);
    float time_delta = (float)(time_end.tv_sec - timer->time_start.tv_sec);
    time_delta += (float)(time_end.tv_nsec - timer->time_start.tv_nsec) / 1000000000.f;
    timer->steps_per_sec = step_delta / time_delta;
}