ICounter Class Reference

#include <counter.h>

Inheritance diagram for ICounter:

Public Member Functions
virtual	~ICounter ()
virtual const wchar_t *	Name () const =0
virtual Status	Activate ()=0
virtual void	Shutdown ()=0
virtual bool	IsSafe () const =0
virtual u64	Counter () const =0
virtual size_t	CounterBits () const =0
virtual double	NominalFrequency () const =0
	initial measurement of the tick rate. More...
virtual double	Resolution () const =0
	actual resolution [s]. More...

Detailed Description

Definition at line 32 of file counter.h.

Constructor & Destructor Documentation

virtual ICounter::~ICounter ( )

inlinevirtual

Definition at line 36 of file counter.h.

Member Function Documentation

virtual Status ICounter::Activate ( )

pure virtual

Implemented in CounterTSC, CounterHPET, CounterTGT, CounterPMT, and CounterQPC.

virtual u64 ICounter::Counter ( ) const

pure virtual

Returns

the current value of the counter (all but the lower CounterBits() bits must be zero)

Implemented in CounterTSC, CounterQPC, CounterHPET, CounterPMT, and CounterTGT.

virtual size_t ICounter::CounterBits ( ) const

pure virtual

Returns

the bit width of the counter (<= 64) WHRT uses this to ensure the counter (running at nominal frequency) doesn't overflow more than once during CALIBRATION_INTERVAL_MS.

Implemented in CounterTSC, CounterQPC, CounterHPET, CounterPMT, and CounterTGT.

virtual bool ICounter::IsSafe ( ) const

pure virtual

Implemented in CounterTSC, CounterHPET, CounterQPC, CounterPMT, and CounterTGT.

virtual const wchar_t* ICounter::Name ( ) const

pure virtual

Implemented in CounterTSC, CounterHPET, CounterTGT, CounterPMT, and CounterQPC.

virtual double ICounter::NominalFrequency ( ) const

pure virtual

initial measurement of the tick rate.

not necessarily correct (e.g. when using TSC: os_cpu_ClockFrequency isn't exact).

Implemented in CounterTSC, CounterQPC, CounterHPET, CounterPMT, and CounterTGT.

virtual double ICounter::Resolution ( ) const

pure virtual

actual resolution [s].

differs from 1/NominalFrequency if the timer adjustment is greater than 1 tick.

Implemented in CounterTSC, CounterQPC, CounterHPET, CounterPMT, and CounterTGT.

virtual void ICounter::Shutdown ( )

pure virtual

Implemented in CounterTSC, CounterHPET, CounterQPC, CounterPMT, and CounterTGT.

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

• /home/sathyam/0ad.svn/source/lib/sysdep/os/win/whrt/counter.h