FIX8::IntervalTimer Class Reference

High resolution interval timer. More...

#include <timer.hpp>

Public Member Functions
	IntervalTimer ()
	Ctor. RAII. More...
virtual	~IntervalTimer ()
	Dtor. More...
const IntervalTimer &	Calculate ()
double	AsDouble () const
double	Reset ()

Private Attributes
Tickval	startTime_
Tickval	delta_

Friends
std::ostream &	operator<< (std::ostream &os, const IntervalTimer &what)

Detailed Description

High resolution interval timer.

Definition at line 241 of file timer.hpp.

Constructor & Destructor Documentation

FIX8::IntervalTimer::IntervalTimer ( )

inline

Ctor. RAII.

Definition at line 254 of file timer.hpp.

: startTime_(true) {}

virtual FIX8::IntervalTimer::~IntervalTimer ( )

inlinevirtual

Dtor.

Definition at line 258 of file timer.hpp.

{}

Member Function Documentation

double FIX8::IntervalTimer::AsDouble ( ) const

inline

Get delta as a double.

Returns

delta as double

Definition at line 278 of file timer.hpp.

References FIX8::Tickval::todouble().

Referenced by FIX8::Message::encode(), FIX8::Message::factory(), and Reset().

{ return delta_.todouble(); }

const IntervalTimer& FIX8::IntervalTimer::Calculate ( )

inline

Calculate elapsed time (delta).

Returns

reference to this object

Definition at line 262 of file timer.hpp.

References startTime_.

Referenced by FIX8::Message::encode(), and FIX8::Message::factory().

   {
#if defined FIX8_USE_RDTSC && defined FIX8_HAVE_RDTSC
      Tickval::ticks now(rdtsc());
#else
      Tickval now(true);
#endif
      delta_ = now - startTime_;
      return *this;
   }

double FIX8::IntervalTimer::Reset ( )

inline

Reset the interval start time.

Returns

the old delta as double

Definition at line 283 of file timer.hpp.

References AsDouble(), and FIX8::Tickval::now().

   {
#if defined FIX8_USE_RDTSC && defined FIX8_HAVE_RDTSC
      const Tickval::ticks curr(delta_);
      startTime_ = rdtsc();
#else
      const double curr(AsDouble());
      startTime_.now();
#endif
      return curr;
   }

Friends And Related Function Documentation

std::ostream& operator<< ( std::ostream &  os, const IntervalTimer &  what  )

friend

Format the interval to 9 decimal places, insert into stream.

Parameters

os	the stream to insert into
what	the IntervalTimer object

Returns

the stream, os

Definition at line 299 of file timer.hpp.

   {
      std::ostringstream ostr;
      ostr.setf(std::ios::showpoint);
      ostr.setf(std::ios::fixed);
#if defined FIX8_USE_RDTSC && defined FIX8_HAVE_RDTSC
      ostr << std::setprecision(9) << what;
#else
      ostr << std::setprecision(9) << what.AsDouble();
#endif
      return os << ostr.str();
   }

Member Data Documentation

Tickval FIX8::IntervalTimer::delta_

private

Definition at line 246 of file timer.hpp.

Tickval FIX8::IntervalTimer::startTime_

private

Definition at line 246 of file timer.hpp.

Referenced by Calculate().

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The documentation for this class was generated from the following file:

• timer.hpp