88 lines
2.2 KiB
C++
88 lines
2.2 KiB
C++
#ifndef __TIME_BASE_H__
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#define __TIME_BASE_H__
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/*
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* Functions To support General Time Managment. And to allow for cross
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* platform use. Today Really Two Base classes and one convience class
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* Time_Clock = The clock time down to micro seconds.. Time_Span = Delta Time
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* to the Mico Second.. Time_Out = Help timer ............count down a
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* duration. I realize TimeClock is really an implied delta to EPOCH. I have
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* chosen to implement it this way. it may be apropriate to convert it all to
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* delta times with an EPOCk constant and functions that can handle the EPOCK
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* to current time. All though this is probably the "right" implementation
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* most coders do not think of clock time in this fashon. General
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* Observation.. Windows 2k and Linux are really slow (~250k a sec) at
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* returning the current system time ?? So use time functions that grab the
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* current system time sparingly ??
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*/
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#ifdef WIN32
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#include <winsock2.h>
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#include <wtypes.h>
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#include <sys/types.h>
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#include <sys/timeb.h>
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#else
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#include <sys/time.h>
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#endif
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#include <time.h>
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#include <string>
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#include <assert.h>
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enum { USEC = 1000000 };
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/**
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*
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*/
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inline void NormalizeTime(timeval &in)
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{
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while (in.tv_usec >= USEC)
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{
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in.tv_usec -= USEC;
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in.tv_sec++;
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}
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while (in.tv_usec < 0)
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{
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in.tv_usec += USEC;
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in.tv_sec--;
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}
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}
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/**
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*
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*/
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inline void TimeDif(const struct timeval &start, const struct timeval &fin, struct timeval &answer)
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{
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answer.tv_usec = fin.tv_usec - start.tv_usec;
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answer.tv_sec = fin.tv_sec - start.tv_sec;
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NormalizeTime(answer);
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}
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/**
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*
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*/
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inline void TimeAdd(const struct timeval &start, const struct timeval &delta, struct timeval &answer)
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{
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answer.tv_usec = start.tv_usec + delta.tv_usec;
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answer.tv_sec = start.tv_sec + delta.tv_sec;
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NormalizeTime(answer);
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}
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#ifdef WIN32
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// Lets make Windows think it is a unix machine :)
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/**
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*
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*/
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inline int gettimeofday(struct timeval *tv, void * trash)
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{
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struct timeb timeb;
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ftime( &timeb);
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tv->tv_sec = (long)timeb.time;
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tv->tv_usec = (unsigned int)timeb.millitm * 1000;
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return 0;
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}
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#endif
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#include "time_clock.h"
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#include "time_span.h"
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#include "time_general.h"
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#include "time_out.h"
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#endif //__TIME_BASE_H__
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