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69
Time/Makefile
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69
Time/Makefile
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#---------------------------------------------------------------------------
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# Makefile
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#
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# Written by Curtis Olson, started May 1997.
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#
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# Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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#
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# $Id$
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# (Log is kept at end of this file)
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#---------------------------------------------------------------------------
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TARGET = libtimer.a
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CFILES = fg_timer.c
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HFILES = fg_timer.h
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OFILES = $(CFILES:.c=.o)
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CC = gcc
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CFLAGS = -g -Wall
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# CFLAGS = -O2 -Wall
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AR = ar
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INCLUDES =
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LIBS =
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#---------------------------------------------------------------------------
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# Primary Targets
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#---------------------------------------------------------------------------
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$(TARGET): $(OFILES)
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$(AR) rv $(TARGET) $(OFILES)
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all: $(TARGET)
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clean:
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rm -f *.o $(TARGET) *~ core
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#---------------------------------------------------------------------------
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# Secondary Targets
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#---------------------------------------------------------------------------
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fg_timer.o: fg_timer.c fg_timer.h
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$(CC) $(CFLAGS) $(INCLUDES) -c fg_timer.c
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#---------------------------------------------------------------------------
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# $Log$
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# Revision 1.1 1997/06/16 19:24:19 curt
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# Initial revision.
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#
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108
Time/fg_timer.c
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108
Time/fg_timer.c
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/**************************************************************************
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* fg_timer.c -- time handling routines
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*
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* Written by Curtis Olson, started June 1997.
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*
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* Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id$
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* (Log is kept at end of this file)
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**************************************************************************/
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#include <signal.h> /* for timer routines */
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#include <stdio.h> /* for printf() */
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#include <time.h> /* for get/setitimer */
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#include <sys/timeb.h> /* for ftime() and struct timeb */
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#include "fg_timer.h"
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unsigned long int fgSimTime;
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static struct itimerval t, ot;
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static void (*callbackfunc)();
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/* This routine catches the SIGALRM */
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void fgTimerCatch() {
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/* ignore any SIGALRM's until we come back from our EOM iteration */
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signal(SIGALRM, SIG_IGN);
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/* printf("In fgTimerCatch()\n"); */
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callbackfunc();
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signal(SIGALRM, fgTimerCatch);
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}
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/* this routine initializes the interval timer to generate a SIGALRM after
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* the specified interval (dt) */
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void fgTimerInit(float dt, void (*f)()) {
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int terr;
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int isec;
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float usec;
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callbackfunc = f;
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isec = (int) dt;
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usec = 1000000* (dt - (float) isec);
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t.it_interval.tv_sec = isec;
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t.it_interval.tv_usec = usec;
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t.it_value.tv_sec = isec;
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t.it_value.tv_usec = usec;
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/* printf("fgTimerInit() called\n"); */
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fgTimerCatch(); /* set up for SIGALRM signal catch */
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terr = setitimer( ITIMER_REAL, &t, &ot );
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if (terr) {
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printf("Error returned from setitimer");
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exit(0);
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}
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}
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/* This function returns the number of milleseconds since the last
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time it was called. */
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int fgGetTimeInterval() {
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static struct timeb last;
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static struct timeb current;
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static int inited = 0;
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int interval;
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if ( ! inited ) {
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inited = 1;
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ftime(&last);
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interval = 0;
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} else {
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ftime(¤t);
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interval = 1000 * (current.time - last.time) +
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(current.millitm - last.millitm);
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}
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last = current;
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return(interval);
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}
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/* $Log$
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/* Revision 1.1 1997/06/16 19:24:20 curt
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/* Initial revision.
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/*
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*/
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50
Time/fg_timer.h
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50
Time/fg_timer.h
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@ -0,0 +1,50 @@
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/**************************************************************************
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* fg_timer.h -- time handling routines
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*
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* Written by Curtis Olson, started June 1997.
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*
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* Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id$
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* (Log is kept at end of this file)
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**************************************************************************/
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#ifndef FG_TIMER_H
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#define FG_TIMER_H
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extern unsigned long int fgSimTime;
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/* this routine initializes the interval timer to generate a SIGALRM
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* after the specified interval (dt) the function f() will be called
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* at each signal */
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void fgTimerInit(float dt, void (*f)());
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/* This function returns the number of milleseconds since the last
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time it was called. */
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int fgGetTimeInterval();
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#endif FG_TIMER_H
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/* $Log$
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/* Revision 1.1 1997/06/16 19:24:20 curt
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/* Initial revision.
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/*
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*/
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