IntervalTimer Class Reference

Inheritance diagram for IntervalTimer:

Collaboration diagram for IntervalTimer:

Public Types
enum	Mode { Hardware = 0 , Virtual , Profile }

Public Member Functions
	IntervalTimer (PosixProcess *pProcess, Mode mode=Hardware)
void	setInterval (Time::Timestamp interval, Time::Timestamp *prevInterval=nullptr)
void	setTimerValue (Time::Timestamp value, Time::Timestamp *prevValue=nullptr)
	Set the current value of the timer.
void	setIntervalAndValue (Time::Timestamp interval, Time::Timestamp value, Time::Timestamp *prevInterval=nullptr, Time::Timestamp *prevValue=nullptr)
	Set both interval and value atomically.
void	disarm ()
void	getIntervalAndValue (Time::Timestamp &interval, Time::Timestamp &value)
void	consumeCpuTime (Time::Timestamp absoluteTotal)
Time::Timestamp	getInterval () const
Time::Timestamp	getValue () const

Private Member Functions
virtual void	timer (uint64_t delta)
Time::Timestamp	absoluteTotal () const
bool	advanceTimeLocked (Time::Timestamp absoluteTotal)
void	armHardwareLocked ()
void	setArmedLocked (bool armed)
void	signal ()

Private Attributes
PosixProcess *	m_Process
Mode	m_Mode
Time::Timestamp	m_Value
Time::Timestamp	m_Interval
Time::Timestamp	m_LastTotal
Spinlock	m_Lock
bool	m_Armed
Timer *	m_pTimer

Detailed Description

Definition at line 57 of file PosixProcess.h.

Member Enumeration Documentation

Mode

enum IntervalTimer::Mode

Enumerator
Hardware	Hardware-backed timer (wall time).
Virtual	CPU time in user mode only.
Profile	CPU time in user and system.

Definition at line 59 of file PosixProcess.h.

Constructor & Destructor Documentation

IntervalTimer()

IntervalTimer::IntervalTimer	(	PosixProcess *	pProcess,
		Mode	mode = Hardware
	)

Setting hw=true will use hardware. hw=false requires adjust() to be called to be able to trigger timers.

Definition at line 172 of file PosixProcess.cc.

References Machine::getTimer(), and Hardware.

~IntervalTimer()

IntervalTimer::~IntervalTimer ( )

virtual

Definition at line 192 of file PosixProcess.cc.

Member Function Documentation

absoluteTotal()

Time::Timestamp IntervalTimer::absoluteTotal ( ) const

private

Definition at line 304 of file PosixProcess.cc.

advanceTimeLocked()

bool IntervalTimer::advanceTimeLocked ( Time::Timestamp  absoluteTotal )

private

Definition at line 317 of file PosixProcess.cc.

armHardwareLocked()

void IntervalTimer::armHardwareLocked ( )

private

Definition at line 327 of file PosixProcess.cc.

consumeCpuTime()

void IntervalTimer::consumeCpuTime

(

Time::Timestamp

absoluteTotal

)

Advances a CPU timer to a monotonic absolute process-time snapshot.

Definition at line 288 of file PosixProcess.cc.

References Hardware, and signal().

Referenced by PosixProcess::reportTimesUpdated().

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disarm()

void IntervalTimer::disarm

(

)

Disarms without delivering an expiry during process teardown.

Definition at line 261 of file PosixProcess.cc.

Referenced by PosixProcess::processTerminated().

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getInterval()

Time::Timestamp IntervalTimer::getInterval

(

)

const

Definition at line 349 of file PosixProcess.cc.

getIntervalAndValue()

void IntervalTimer::getIntervalAndValue	(	Time::Timestamp &	interval,
		Time::Timestamp &	value
	)

Definition at line 273 of file PosixProcess.cc.

getValue()

Time::Timestamp IntervalTimer::getValue

(

)

const

Definition at line 353 of file PosixProcess.cc.

setArmedLocked()

void IntervalTimer::setArmedLocked ( bool  armed )

private

Definition at line 339 of file PosixProcess.cc.

setInterval()

void IntervalTimer::setInterval	(	Time::Timestamp	interval,
		Time::Timestamp *	prevInterval = nullptr
	)

Set the interval for the timer, which is loaded once the timer expires. Set zero to make a non-reloading timer.

Definition at line 201 of file PosixProcess.cc.

References signal().

setIntervalAndValue()

void IntervalTimer::setIntervalAndValue	(	Time::Timestamp	interval,
		Time::Timestamp	value,
		Time::Timestamp *	prevInterval = nullptr,
		Time::Timestamp *	prevValue = nullptr
	)

Set both interval and value atomically.

Definition at line 236 of file PosixProcess.cc.

References signal().

setTimerValue()

void IntervalTimer::setTimerValue	(	Time::Timestamp	value,
		Time::Timestamp *	prevValue = nullptr
	)

Set the current value of the timer.

Definition at line 218 of file PosixProcess.cc.

References signal().

signal()

void IntervalTimer::signal ( )

private

Todo:

sanity check that this is absolutely a PosixSubsystem

Definition at line 381 of file PosixProcess.cc.

References Process::acquireProcessSignalThread(), Hardware, Scheduler::instance(), Profile, PosixSubsystem::sendSignal(), signal(), and Virtual.

Referenced by consumeCpuTime(), setInterval(), setIntervalAndValue(), setTimerValue(), signal(), and timer().

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timer()

void IntervalTimer::timer ( uint64_t  delta )

privatevirtual

Called when the handler is registered with the Timer class and a timer event occurred.

Parameters

[in]

delta

time elapsed since the last event, in nanoseconds.

Implements TimerHandler.

Definition at line 357 of file PosixProcess.cc.

References Hardware, and signal().

Member Data Documentation

m_Armed

bool IntervalTimer::m_Armed

private

Definition at line 111 of file PosixProcess.h.

m_Interval

Time::Timestamp IntervalTimer::m_Interval

private

Definition at line 108 of file PosixProcess.h.

m_LastTotal

Time::Timestamp IntervalTimer::m_LastTotal

private

Definition at line 109 of file PosixProcess.h.

m_Lock

Spinlock IntervalTimer::m_Lock

private

Definition at line 110 of file PosixProcess.h.

m_Mode

Mode IntervalTimer::m_Mode

private

Definition at line 106 of file PosixProcess.h.

m_Process

PosixProcess* IntervalTimer::m_Process

private

Definition at line 105 of file PosixProcess.h.

m_pTimer

Timer* IntervalTimer::m_pTimer

private

Definition at line 112 of file PosixProcess.h.

m_Value

Time::Timestamp IntervalTimer::m_Value

private

Definition at line 107 of file PosixProcess.h.

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

• PosixProcess.h
• PosixProcess.cc