src/work/marci/time_measure.h
author marci
Thu, 04 Mar 2004 19:45:06 +0000
changeset 156 a34e5a909e97
parent 124 8d24100ad408
child 259 509ba9f136d2
permissions -rw-r--r--
.
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// -*- c++ -*-
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#ifndef TIME_MEASURE_H
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#define TIME_MEASURE_H
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#include <sys/time.h>
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#include <sys/times.h>
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#include <fstream>
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#include <iostream>
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#include <unistd.h>
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double currTime() {
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  timeval tv;
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  //timezone tz;
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  gettimeofday(&tv, 0);
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  return double(tv.tv_sec)+double(tv.tv_usec)/1000000.0;
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}
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class TimeStamp
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{
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  tms ts;
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  double real_time;
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public:
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  tms &getTms() {return ts;}
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  const tms &getTms() const {return ts;}
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  double getRealTime() const {return real_time;}
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  void stamp()
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  {
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    timeval tv;
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    times(&ts);
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    gettimeofday(&tv, 0);real_time=tv.tv_sec+double(tv.tv_usec)/1e6;
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  }
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  TimeStamp()
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  { ts.tms_utime=ts.tms_stime=ts.tms_cutime=ts.tms_cstime=0; real_time=0;}
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  TimeStamp(void *) { stamp();}
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  TimeStamp &operator+=(const TimeStamp &b)
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  {
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    ts.tms_utime+=b.ts.tms_utime;
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    ts.tms_stime+=b.ts.tms_stime;
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    ts.tms_cutime+=b.ts.tms_cutime;
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    ts.tms_cstime+=b.ts.tms_cstime;
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    real_time+=b.real_time;
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    return *this;
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  }
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  TimeStamp operator+(const TimeStamp &b) const
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  {
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    TimeStamp t(*this);
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    return t+=b;
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  }
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  TimeStamp &operator-=(const TimeStamp &b)
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  {
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    ts.tms_utime-=b.ts.tms_utime;
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    ts.tms_stime-=b.ts.tms_stime;
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    ts.tms_cutime-=b.ts.tms_cutime;
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    ts.tms_cstime-=b.ts.tms_cstime;
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    real_time-=b.real_time;
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    return *this;
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  }
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  TimeStamp operator-(const TimeStamp &b) const
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  {
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    TimeStamp t(*this);
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    return t-=b;
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  }
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  TimeStamp Ellapsed() const
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  {
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    TimeStamp t(NULL);
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    return t-*this;
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  }
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  friend std::ostream& operator<<(std::ostream& os,const TimeStamp &t);
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  double getUserTime() const
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  {
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    return double(ts.tms_utime)/sysconf(_SC_CLK_TCK);
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  }
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  double getSystemTime() const
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  {
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    return double(ts.tms_stime)/sysconf(_SC_CLK_TCK);
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  }
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  double getCUserTime() const
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  {
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    return double(ts.tms_cutime)/sysconf(_SC_CLK_TCK);
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  }
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  double getCSystemTime() const
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  {
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    return double(ts.tms_cstime)/sysconf(_SC_CLK_TCK);
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  }
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};
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class Timer
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{
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  TimeStamp start_time;
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  void _reset() {start_time.stamp();}
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public: 
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  Timer() {_reset();}
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  operator TimeStamp ()
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  {
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    TimeStamp t;
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    t.stamp();
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    return t-start_time;
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  }
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  TimeStamp reset()
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  {
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    TimeStamp t(start_time);
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    _reset();
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    return start_time-t;
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  }
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};
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inline std::ostream& operator<<(std::ostream& os,const TimeStamp &t)
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{
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  long cls = sysconf(_SC_CLK_TCK);
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  os << "u: " << double(t.getTms().tms_utime)/cls <<
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    "s, s: " << double(t.getTms().tms_stime)/cls <<
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    "s, cu: " << double(t.getTms().tms_cutime)/cls <<
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    "s, cs: " << double(t.getTms().tms_cstime)/cls <<
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    "s, real: " << t.getRealTime() << "s";
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  return os;
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}
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#endif //TIME_MEASURE_H