nachos.threads
Class ThreadedKernel

java.lang.Object
  nachos.machine.Kernel
      nachos.threads.ThreadedKernel

Direct Known Subclasses:

UserKernel

public class ThreadedKernel
extends Kernel

A multi-threaded OS kernel.

Field Summary

static Alarm	alarm Globally accessible reference to the alarm.
static FileSystem	fileSystem Globally accessible reference to the file system.
static Scheduler	scheduler Globally accessible reference to the scheduler.

Fields inherited from class nachos.machine.Kernel

kernel

Constructor Summary

ThreadedKernel()
Allocate a new multi-threaded kernel.

Method Summary

void	initialize(String[] args) Initialize this kernel.
void	run() A threaded kernel does not run user programs, so this method does nothing.
void	selfTest() Test this kernel.
void	terminate() Terminate this kernel.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

scheduler

public static Scheduler scheduler

Globally accessible reference to the scheduler.

alarm

public static Alarm alarm

Globally accessible reference to the alarm.

fileSystem

public static FileSystem fileSystem

Globally accessible reference to the file system.

Constructor Detail

ThreadedKernel

public ThreadedKernel()

Allocate a new multi-threaded kernel.

Method Detail

initialize

public void initialize(String[] args)

Initialize this kernel. Creates a scheduler, the first thread, and an alarm, and enables interrupts. Creates a file system if necessary.

Specified by:

initialize in class Kernel

selfTest

public void selfTest()

Test this kernel. Test the KThread, Semaphore, SynchList, and ElevatorBank classes. Note that the autograder never calls this method, so it is safe to put additional tests here.

Specified by:

selfTest in class Kernel

run

public void run()

A threaded kernel does not run user programs, so this method does nothing.

Specified by:

run in class Kernel

terminate

public void terminate()

Terminate this kernel. Never returns.

Specified by:

terminate in class Kernel