mirror of
https://github.com/buserror/mii_emu.git
synced 2024-11-29 02:49:59 +00:00
47 lines
1.0 KiB
C
47 lines
1.0 KiB
C
|
/*
|
||
|
|
* miigl_counter.h
|
||
|
|
*
|
||
|
|
* Copyright (C) 2023 Michel Pollet <buserror@gmail.com>
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: MIT
|
||
|
|
*/
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include <time.h>
|
||
|
|
#include <stdint.h>
|
||
|
|
#include "fifo_declare.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Cheapish way of counting how many time 'stuff' happends in a second,
|
||
|
|
* Can be used to count FPS or other things as long as the frequency is less
|
||
|
|
* than 1024hz.
|
||
|
|
*/
|
||
|
|
DECLARE_FIFO(uint64_t, miigl_counter, 1024);
|
||
|
|
DEFINE_FIFO(uint64_t, miigl_counter);
|
||
|
|
static uint64_t
|
||
|
|
miigl_get_time()
|
||
|
|
{
|
||
|
|
struct timespec tim;
|
||
|
|
clock_gettime(CLOCK_MONOTONIC_RAW, &tim);
|
||
|
|
uint64_t time = ((uint64_t)tim.tv_sec) * (1000000 / 1) +
|
||
|
|
tim.tv_nsec / (1000 * 1);
|
||
|
|
return time;
|
||
|
|
}
|
||
|
|
static int
|
||
|
|
miigl_counter_tick(
|
||
|
|
miigl_counter_t *c,
|
||
|
|
uint64_t time)
|
||
|
|
{
|
||
|
|
// = miigl_get_time();
|
||
|
|
// delete stamps that are older than a second
|
||
|
|
while (!miigl_counter_isempty(c) &&
|
||
|
|
(time - miigl_counter_read_at(c, 0)) > 1000000) {
|
||
|
|
miigl_counter_read(c);
|
||
|
|
}
|
||
|
|
long freq = miigl_counter_get_read_size(c);
|
||
|
|
if (!miigl_counter_isfull(c))
|
||
|
|
miigl_counter_write(c, time);
|
||
|
|
return freq;
|
||
|
|
}
|