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