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Thread Class Reference

#include <Thread.h>

Inheritance diagram for Thread:

List of all members.

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Detailed Description

Base class from which all multithreaded classes are derived. The derived classes inherit a set of methods that can be used to control the thread. Once the thread is spawned and made ready the run method is scheduled for execution. The run method is declared as virtual and has to be overwritten by the inheritor.

Author:

Jia L. Du

Public Member Functions
	Thread (char *name, int stackSize, int priority, int id)
bool	spawn ()
void	ready ()
void	suspend ()
void	kill ()
Protected Member Functions
void	reschedule ()
void	sleep (int hundrethSeconds)
Static Protected Member Functions
void	run ()
Protected Attributes
tcb *	threadControlBlock
char *	name
int	stackSize
int	priority
int	id

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Constructor & Destructor Documentation

Thread::Thread (  char *    name, int    stackSize, int    priority, int    id )

Constructor for Thread Parameters: name  pointer to thread name stackSize  size of thread stack priority  thread priority (valid values are: MIN_ PRI to MAX_PRI) id  a unique thread id

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Member Function Documentation

void Thread::kill (    )

The thread is removed and cannot be used anymore

void Thread::ready (    )

Sets the status of the thread to READY, i.e. it is scheduled for execution

void Thread::reschedule (    )  [protected]

Tells the scheduler to choose another thread for execution

void Thread::run (    )  [static, protected]

The method is overwritten by the inheritor. When the thread starts the code in this run method is executed Reimplemented in Commander, SIR, and UI.

void Thread::sleep (  int    hundrethSeconds )  [protected]

Let the thread sleep for at least n hundreth seconds Parameters: hundrethSeconds

bool Thread::spawn (    )

The thread is initialized and inserted in scheduler queue but not set to READY yet Returns: true if spawn was successful See also: Thread::ready() Reimplemented in Commander, SIR, and UI.

void Thread::suspend (    )

The status of the thread is set to SUSPENDED. It will not be scheduled for execution anymore until it is set to READY again See also: Thread::ready()

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Member Data Documentation

int Thread::id [protected]

char* Thread::name [protected]

int Thread::priority [protected]

int Thread::stackSize [protected]

tcb* Thread::threadControlBlock [protected]

Thread control blocks are used by the RoBIOS library to manage threads. This Thread class handles the thread control block internally thus hiding complexity from the user

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