nachos.userprog
Class SynchConsole

java.lang.Object
  nachos.userprog.SynchConsole

public class SynchConsole
extends Object

Provides a simple, synchronized interface to the machine's console. The interface can also be accessed through OpenFile objects.

Constructor Summary

SynchConsole(SerialConsole console)
Allocate a new SynchConsole.

Method Summary

OpenFile	openForReading() Return an OpenFile that can be used to read this as a file.
OpenFile	openForWriting() Return an OpenFile that can be used to write this as a file.
int	readByte(boolean block) Return the next unsigned byte received (in the range 0 through 255).
void	writeByte(int value) Send a byte.

Methods inherited from class java.lang.Object

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

Constructor Detail

SynchConsole

public SynchConsole(SerialConsole console)

Allocate a new SynchConsole.

Parameters:

console - the underlying serial console to use.

Method Detail

readByte

public int readByte(boolean block)

Return the next unsigned byte received (in the range 0 through 255). If a byte has not arrived at, blocks until a byte arrives, or returns immediately, depending on the value of block.

Parameters:

block - true if readByte() should wait for a byte if none is available.

Returns:

the next byte read, or -1 if block was false and no byte was available.

openForReading

public OpenFile openForReading()

Return an OpenFile that can be used to read this as a file.

Returns:

a file that can read this console.

writeByte

public void writeByte(int value)

Send a byte. Blocks until the send is complete.

Parameters:

value - the byte to be sent (the upper 24 bits are ignored).

openForWriting

public OpenFile openForWriting()

Return an OpenFile that can be used to write this as a file.

Returns:

a file that can write this console.