/**
* Execute the tasks managed by this scheduler.
*/
public void schedule()
{
this.currentTcb = this.list;
#if TRACEIT
int kkk = 0;
#endif
while (this.currentTcb != null)
{
#if TRACEIT
Console.WriteLine("kkk = {0}", kkk); kkk++;
#endif
if (this.currentTcb.isHeldOrSuspended())
{
#if TRACEIT
Console.WriteLine("held");
#endif
this.currentTcb = this.currentTcb.link;
}
else
{
this.currentId = this.currentTcb.id;
#if TRACEIT
Console.WriteLine("currentId is now...{0}", this.currentId.ToString());
#endif
this.currentTcb = this.currentTcb.run();
}
}
}
public Scheduler()
{
this.queueCount = 0;
this.holdCount = 0;
this.blocks = new TaskControlBlock[Support.NUMBER_OF_IDS];
this.list = null;
this.currentTcb = null;
this.currentId = 0;
}
/**
* Add the specified packet to the end of the worklist used by the task
* associated with the packet and make the task runnable if it is currently
* suspended.
* @param {Packet} packet the packet to add
*/
public TaskControlBlock queue(Packet packet)
{
TaskControlBlock t = this.blocks[packet.id];
if (t == null)
{
return(t);
}
this.queueCount++;
packet.link = null;
packet.id = this.currentId;
return(t.checkPriorityAdd(this.currentTcb, packet));
}
/**
* Adds a packet to the worklist of this block's task, marks this as runnable if
* necessary, and returns the next runnable object to run (the one
* with the highest priority).
*/
public TaskControlBlock checkPriorityAdd(TaskControlBlock task, Packet packet)
{
if (this.queue == null)
{
this.queue = packet;
this.markAsRunnable();
if (this.priority >= task.priority)
{
return(this);
}
}
else
{
this.queue = packet.addTo(this.queue);
}
return(task);
}
public TaskControlBlock(TaskControlBlock link, int id, int priority,
Packet queue, Task task)
{
this.link = link;
this.id = id;
this.priority = priority;
this.queue = queue;
this.task = task;
if (queue == null)
{
this.state = Support.STATE_SUSPENDED;
}
else
{
this.state = Support.STATE_SUSPENDED_RUNNABLE;
}
}
/**
* Release a task that is currently blocked and return the next block to run.
* @param {int} id the id of the task to suspend
*/
public TaskControlBlock release(int id)
{
TaskControlBlock tcb = this.blocks[id];
if (tcb == null)
{
return(tcb);
}
tcb.markAsNotHeld();
if (tcb.priority >= this.currentTcb.priority)
{
return(tcb);
}
else
{
return(this.currentTcb);
}
}
/**
* Add the specified task to this scheduler.
* @param {int} id the identity of the task
* @param {int} priority the task's priority
* @param {Packet} queue the queue of work to be processed by the task
* @param {Task} task the task to add
*/
public void addTask(int id, int priority, Packet queue, Task task)
{
this.currentTcb = new TaskControlBlock(this.list, id, priority, queue, task);
this.list = this.currentTcb;
this.blocks[id] = this.currentTcb;
}
/**
* Adds a packet to the worklist of this block's task, marks this as runnable if
* necessary, and returns the next runnable object to run (the one
* with the highest priority).
*/
public TaskControlBlock checkPriorityAdd(TaskControlBlock task, Packet packet)
{
if (this.queue == null)
{
this.queue = packet;
this.markAsRunnable();
if (this.priority >= task.priority) return this;
}
else
{
this.queue = packet.addTo(this.queue);
}
return task;
}
public TaskControlBlock(TaskControlBlock link, int id, int priority,
Packet queue, Task task)
{
this.link = link;
this.id = id;
this.priority = priority;
this.queue = queue;
this.task = task;
if (queue == null)
{
this.state = Support.STATE_SUSPENDED;
}
else
{
this.state = Support.STATE_SUSPENDED_RUNNABLE;
}
}
/**
* Execute the tasks managed by this scheduler.
*/
public void schedule()
{
this.currentTcb = this.list;
#if TRACEIT
int kkk = 0;
#endif
while (this.currentTcb != null)
{
#if TRACEIT
Console.WriteLine("kkk = {0}", kkk); kkk++;
#endif
if (this.currentTcb.isHeldOrSuspended())
{
#if TRACEIT
Console.WriteLine("held");
#endif
this.currentTcb = this.currentTcb.link;
}
else
{
this.currentId = this.currentTcb.id;
#if TRACEIT
Console.WriteLine("currentId is now...{0}", this.currentId.ToString());
#endif
this.currentTcb = this.currentTcb.run();
}
}
}
/**
* Add the specified task to this scheduler.
* @param {int} id the identity of the task
* @param {int} priority the task's priority
* @param {Packet} queue the queue of work to be processed by the task
* @param {Task} task the task to add
*/
public void addTask(int id, int priority, Packet queue, Task task)
{
this.currentTcb = new TaskControlBlock(this.list, id, priority, queue, task);
this.list = this.currentTcb;
this.blocks[id] = this.currentTcb;
}
public Scheduler()
{
this.queueCount = 0;
this.holdCount = 0;
this.blocks = new TaskControlBlock[Support.NUMBER_OF_IDS];
this.list = null;
this.currentTcb = null;
this.currentId = 0;
}