0 A.D.: CounterQPC

Overview

Project

Class

Tree

Deprecated

Index

0 A.D.

FRAMES NO FRAMES

SUMMARY: INNER | FIELD | CONSTR | METHOD

DETAIL: FIELD | CONSTR | METHOD

lib.sysdep.win.whrt
Class CounterQPC

boost::noncopyable
   |
   +--ICounter
         |
         +--CounterQPC

in qpc.h
in qpc.cpp

class CounterQPC
extends ICounter

========================================================================= File : qpc.h Project : 0 A.D. Description : Timer implementation using QueryPerformanceCounter =========================================================================

Field Summary
`private i64`	`m_frequency`

Constructor Summary
`CounterQPC()`

Method Summary
`virtual LibError`	`Activate()` ========================================================================= File : qpc.
`virtual u64`	`Counter() const`
`virtual uint`	`CounterBits() const` WHRT uses this to ensure the counter (running at nominal frequency) doesn't overflow more than once during CALIBRATION_INTERVAL_MS.
`virtual bool`	`IsSafe() const`
`virtual const char*`	`Name() const`
`virtual double`	`NominalFrequency() const` initial measurement of the tick rate.
`virtual void`	`Shutdown()`

Methods inherited from class ICounter

Name, Activate, Shutdown, IsSafe, Counter, CounterBits, NominalFrequency, Resolution

Field Detail

m_frequency

private i64 m_frequency;

Constructor Detail

CounterQPC

public CounterQPC();

Method Detail

Activate

public virtual LibError Activate();

========================================================================= File : qpc.cpp Project : 0 A.D. Description : Timer implementation using QueryPerformanceCounter =========================================================================

Counter

public virtual u64 Counter() const;

CounterBits

public virtual uint CounterBits() const;

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;

Name

public virtual const char* Name() const;

NominalFrequency

public virtual double NominalFrequency() const;

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

Shutdown

public virtual void Shutdown();