MythSignalingTimer Class Reference

This class is essentially a workaround for a Qt 4.5.2 bug where it will get stuck in the Qt event loop for up to 999 nanoseconds per timer firing. More...

#include <mythsignalingtimer.h>

Inheritance diagram for MythSignalingTimer:

List of all members.

Signals
void	timeout (void)
Public Member Functions
	MythSignalingTimer (QObject *parent, const char *slot)
	~MythSignalingTimer ()
virtual void	stop (void)
virtual void	start (int msec)
virtual bool	blockSignals (bool block)
Private Member Functions
virtual void	run (void)
	Runs the Qt event loop unless we have a QRunnable, in which case we run the runnable run instead.
Private Attributes
QMutex	startStopLock
volatile bool	dorun
volatile bool	running
volatile uint64_t	microsec

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Detailed Description

This class is essentially a workaround for a Qt 4.5.2 bug where it will get stuck in the Qt event loop for up to 999 nanoseconds per timer firing.

This lost millisecond is not a huge issue for infrequent timers, but causes 7% lost CPU in the MythUI animate() handling.

Definition at line 19 of file mythsignalingtimer.h.

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Constructor & Destructor Documentation

MythSignalingTimer::MythSignalingTimer	(	QObject *	parent,
		const char *	slot
	)

Definition at line 23 of file mythsignalingtimer.cpp.

MythSignalingTimer::~MythSignalingTimer

(

)

Definition at line 32 of file mythsignalingtimer.cpp.

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Member Function Documentation

void MythSignalingTimer::stop

(

void

)

[virtual]

Definition at line 55 of file mythsignalingtimer.cpp.

Referenced by MythMainWindow::Init(), MythMainWindow::SetDrawEnabled(), MythMainWindow::~MythMainWindow(), and ~MythSignalingTimer().

void MythSignalingTimer::start

(

int

msec

)

[virtual]

Definition at line 38 of file mythsignalingtimer.cpp.

Referenced by MythMainWindow::MythMainWindow(), MythMainWindow::ReinitDone(), and MythMainWindow::SetDrawEnabled().

virtual bool MythSignalingTimer::blockSignals

(

bool

block

)

[inline, virtual]

Definition at line 30 of file mythsignalingtimer.h.

Referenced by MythMainWindow::animate().

void MythSignalingTimer::timeout

(

void

)

[signal]

Referenced by MythSignalingTimer(), and run().

void MythSignalingTimer::run

(

void

)

[private, virtual]

Runs the Qt event loop unless we have a QRunnable, in which case we run the runnable run instead.

Note:

If you override this method you must call RunProlog before you do any work and RunEpilog before you exit the run method.

Reimplemented from MThread.

Definition at line 71 of file mythsignalingtimer.cpp.

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Member Data Documentation

QMutex MythSignalingTimer::startStopLock [private]

Definition at line 39 of file mythsignalingtimer.h.

Referenced by start(), and stop().

volatile bool MythSignalingTimer::dorun [private]

Definition at line 40 of file mythsignalingtimer.h.

Referenced by run(), start(), and stop().

volatile bool MythSignalingTimer::running [private]

Definition at line 41 of file mythsignalingtimer.h.

Referenced by run(), start(), and stop().

volatile uint64_t MythSignalingTimer::microsec [private]

Definition at line 42 of file mythsignalingtimer.h.

Referenced by run(), and start().

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

• mythsignalingtimer.h
• mythsignalingtimer.cpp