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C:/temp/src/j2k/Deprecated/old_18mar_diff/nto/Measure.cpp

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#ifndef __J2K__Measure_CPP__
#define __J2K__Measure_CPP__


#include <j2k/nto/Measure.hpp>


 const ULONG  Measure::Period_1_ms   =   1000000L;
 const ULONG  Measure::Period_10_ms  =  10000000L;
 const ULONG  Measure::Period_100_ms = 100000000L;

       double Measure::cpu_freq      = 0.00f;
       ULONG  Measure::clock_period  = Period_1_ms;

Measure::Measure() 
 : elapsed( 0.0f ), start_time( 0ull ), stop_time( 0ull )
{ 

  // Get the CPU frequency in order to do a precide time calculation
  cpu_freq = SYSPAGE_ENTRY( qtime )->cycles_per_sec;

  setClockPeriod();
}

void Measure::setClockPeriod( ULONG nsec = Period_1_ms )
{
  // Set the system clock period to 1 ms, 
  // a frequency that works with any 40 MHz or higher speed
  // processor, including the low speed Elan-104 boards running at 66 MHz
  // and the blazing fast Pentium III.

  clock_period = nsec;

  // There is only two data member in clkper:
  clkper.nsec  = nsec;
  clkper.fract = 0;
  ClockPeriod( CLOCK_REALTIME, &clkper, NULL, 0 );  // 1 ms
}


#endif

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