lib.sysdep.win.whrt
Class ICounter

boost::noncopyable
   |
   +--ICounter

Direct Known Subclasses:

CounterHPET, CounterPMT, CounterQPC, CounterTGT, CounterTSC

class ICounter

extends boost::noncopyable

========================================================================= File : counter.h Project : 0 A.D. Description : Interface for counter implementations =========================================================================

~ICounter

public virtual ~ICounter();

Activate

public virtual LibError Activate()= 0;

Counter

public virtual u64 Counter() const = 0;

Returns:

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

CounterBits

public virtual uint CounterBits() const = 0;

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.

IsSafe

public virtual bool IsSafe() const = 0;

Name

public virtual const char* Name() const = 0;

NominalFrequency

public virtual double NominalFrequency() const = 0;

initial measurement of the tick rate. not necessarily correct (e.g. when using TSC: wcpu_ClockFrequency isn't exact).

Resolution

public virtual double Resolution() const;

actual resolution [s] (override if the timer adjustment is greater than 1 tick).

Shutdown

public virtual void Shutdown()= 0;