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https://github.com/kichikuou/xsystem35-sdl2.git
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107 lines
2.9 KiB
C
107 lines
2.9 KiB
C
/*
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* counter.c 内部カウンタ
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*
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* Copyright (C) 1997-1998 Masaki Chikama (Wren) <chikama@kasumi.ipl.mech.nagoya-u.ac.jp>
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* 1998- <masaki-c@is.aist-nara.ac.jp>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*
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*/
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/* $Id: counter.c,v 1.10 2000/11/25 13:09:03 chikama Exp $ */
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include "counter.h"
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#include "nact.h"
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#define HICOUNTER_MAX (256 + EXTER_HIGHTCOUNTER_NUM)
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static struct timeval tv_base;
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static int counter_init = 0;
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static int counter_init_high[HICOUNTER_MAX];
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static struct timeval tv_high[HICOUNTER_MAX];
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static int division_high[HICOUNTER_MAX] = { [0 ...( HICOUNTER_MAX-1 )]=1};
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// Allow up to 10 get_counter() calls in single animation frame
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void counter_throttle(void) {
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static int frame = -1;
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static int count = 0;
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if (nact->frame_count == frame) {
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if (++count >= 10)
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nact->wait_vsync = TRUE;
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} else {
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frame = nact->frame_count;
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count = 0;
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}
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}
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int get_counter(int division) {
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long sec, usec, usec2;
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struct timeval tv;
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counter_throttle();
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gettimeofday(&tv, NULL);
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sec = tv.tv_sec - tv_base.tv_sec;
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usec = tv.tv_usec - tv_base.tv_usec;
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usec2 = sec * 1000l + usec / 1000l;
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return counter_init + (int)(usec2 / division);
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}
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/* カウンタ〜を valでリセット */
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/* 初期化時に一度呼んでおく */
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void reset_counter(int val) {
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counter_init = val;
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gettimeofday(&tv_base, NULL);
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}
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int get_high_counter(int num) {
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long sec, usec, usec2;
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struct timeval tv;
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struct timeval tv_base = tv_high[num -1];
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int division = division_high[num -1];
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counter_throttle();
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gettimeofday(&tv, NULL);
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sec = tv.tv_sec - tv_base.tv_sec;
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usec = tv.tv_usec - tv_base.tv_usec;
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usec2 = sec * (1000l/division)+ usec / 1000l /division;
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return counter_init_high[num -1] + usec2;
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}
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/* 高精度カウンタ〜 thanx tajiri@wizard */
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/* カウンタ〜を valでリセット */
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/* 初期化時に一度呼んでおく */
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void reset_counter_high(int num,int division,int val) {
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if (num == 0) {
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int i;
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for (i = 0; i < 256; i++) {
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counter_init_high[i] = val;
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gettimeofday(&tv_high[i], NULL);
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division_high[i]=division;
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}
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} else {
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counter_init_high[num -1] = val;
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gettimeofday(&tv_high[num -1], NULL);
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division_high[num -1]=division;
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}
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}
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