Timer Class Reference

The Timer class is responsible for managing the hardware timer and all timer callback events. More...

#include <timer.h>

Collaboration diagram for Timer:

[legend]List of all members.

Public Member Functions
void	init ()
void	schedule (Timer_callback &callback, unsigned milliseconds, void *argument=NULL)
void	unschedule (Timer_callback &callback)
void	reschedule (Timer_callback &callback, unsigned milliseconds)
unsigned	system_time ()
void	print ()
Public Attributes
Int_handler	handler
List< Timer_callback >	callbacks
unsigned volatile	cycles_per_millisecond
Static Public Attributes
const unsigned	TIMER_HZ = 1000

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Detailed Description

The Timer class is responsible for managing the hardware timer and all timer callback events.

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Member Function Documentation

void Timer::init (   )

Reprogram the timer to tick at TIMER_HZ and enable the timer handler.

void Timer::print (   )

Print information about this timer.

void Timer::reschedule (  Timer_callback &  callback, unsigned  milliseconds )

Reschedule the given callback so that its countdown starts again with the given number of milliseconds per cycle.

void Timer::schedule (  Timer_callback &  callback, unsigned  milliseconds, void *  argument = NULL )

Schedule the provided callback for invocation every given number of milliseconds. schedule() does not block but instead returns immediately. The callback will be invoked with the provided argument.

unsigned Timer::system_time (   )

Return the current system time as milliseconds since initialization.

void Timer::unschedule (  Timer_callback &  callback  )

Unschedule the given callback.

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Member Data Documentation

List<Timer_callback> Timer::callbacks

list of scheduled callbacks

unsigned volatile Timer::cycles_per_millisecond

the speed of this processor

Int_handler Timer::handler

timer handler

const unsigned Timer::TIMER_HZ = 1000 [static]

handler called this many times/sec

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

• timer.h
• timer.cc

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Torsion Operating System, Copyright (C) 2000-2004 Dan Helfman