Dispatcher Class Reference

The dispatcher dispatches threads and puts the scheduler's decisions into action. More...

#include <dispatcher.h>

Collaboration diagram for Dispatcher:

Public Member Functions
	Dispatcher ()
	constructor More...
Thread *	active ()
	Returns the thread currently running on the CPU core calling this method. More...
bool	isActive (const Thread *thread, unsigned *cpu=nullptr)
	Check if thread is currently active. More...
void	go (Thread *first)
	This method stores first as life pointer for this CPU core and triggers the execution of first. Only to be used for the first thread running on a CPU. More...
void	dispatch (Thread *next)
	Updates the life pointer to next and issues a thread change from the old to the new life pointer. More...

Private Member Functions
void	setActive (Thread *thread)
	set the currently active thread More...

Detailed Description

The dispatcher dispatches threads and puts the scheduler's decisions into action.

The dispatcher manages the life pointer that refers to the currently active thread and performs the actual switching of processes. For single-core systems, a single life pointer is sufficient, as only a single thread can be active at any one time. On multi-core systems, every CPU core needs its own life pointer.

Constructor & Destructor Documentation

Dispatcher()

Dispatcher::Dispatcher

(

)

constructor

Initialize life pointer with nullptr to indicate that nothing is (yet) being executed on the respective CPU.

Member Function Documentation

active()

Thread * Dispatcher::active ( )

inline

Returns the thread currently running on the CPU core calling this method.

dispatch()

void Dispatcher::dispatch

(

Thread *

next

)

Updates the life pointer to next and issues a thread change from the old to the new life pointer.

Parameters

next	Next thread to be executed.

go()

void Dispatcher::go

(

Thread *

first

)

This method stores first as life pointer for this CPU core and triggers the execution of first. Only to be used for the first thread running on a CPU.

Parameters

first

First thread to be executed on this CPU core.

isActive()

bool Dispatcher::isActive ( const Thread *  thread, unsigned *  cpu = nullptr  )

inline

Check if thread is currently active.

Parameters

thread	Pointer to the thread in question
cpu	will receive the core number if cpu pointer is not nullptr and the thread is currently active

Returns

true if currently running, false otherwise

setActive()

void Dispatcher::setActive ( Thread *  thread )

inlineprivate

set the currently active thread

Parameters

thread

active Thread

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

• thread/dispatcher.h
• thread/dispatcher.cc