private void downHeap(int pos)
{
int current = pos;
int child = 2 * current + 1;
while (child < size && size > 0)
{
// compare the children if they exist
if (child + 1 < size &&
timers[child + 1].when < timers[child].when)
{
child++;
}
// compare selected child with parent
if (timers[current].when < timers[child].when)
{
break;
}
// swap the two
TimerTask tmp = timers[current];
timers[current] = timers[child];
timers[child] = tmp;
// update pos and current
current = child;
child = 2 * current + 1;
}
}
/**
* Schedule a task for single execution after a specified delay.
*
* @param task
* the task to schedule.
* @param delay
* amount of time in milliseconds before execution.
* @throws IllegalArgumentException
* if {@code delay < 0}.
* @throws IllegalStateException
* if the {@code Timer} has been canceled, or if the task has been
* scheduled or canceled.
*/
public void schedule(TimerTask task, long delay)
{
if (delay < 0)
{
throw new java.lang.IllegalArgumentException();
}
scheduleImpl(task, delay, -1, false);
}
/**
* Schedule a task for repeated fixed-rate execution after a specific delay
* has passed.
*
* @param task
* the task to schedule.
* @param delay
* amount of time in milliseconds before first execution.
* @param period
* amount of time in milliseconds between subsequent executions.
* @throws IllegalArgumentException
* if {@code delay < 0} or {@code period < 0}.
* @throws IllegalStateException
* if the {@code Timer} has been canceled, or if the task has been
* scheduled or canceled.
*/
public void scheduleAtFixedRate(TimerTask task, long delay, long period)
{
if (delay < 0 || period <= 0)
{
throw new java.lang.IllegalArgumentException();
}
scheduleImpl(task, delay, period, true);
}
/**
* Schedule a task for repeated fixed-rate execution after a specific time
* has been reached.
*
* @param task
* the task to schedule.
* @param when
* time of first execution.
* @param period
* amount of time in milliseconds between subsequent executions.
* @throws IllegalArgumentException
* if {@code when.getTime() < 0} or {@code period < 0}.
* @throws IllegalStateException
* if the {@code Timer} has been canceled, or if the task has been
* scheduled or canceled.
*/
public void scheduleAtFixedRate(TimerTask task, Date when, long period)
{
if (period <= 0 || when.getTime() < 0)
{
throw new java.lang.IllegalArgumentException();
}
long delay = when.getTime() - java.lang.SystemJ.currentTimeMillis();
scheduleImpl(task, delay, period, true);
}
/**
* Schedule a task for single execution. If {@code when} is less than the
* current time, it will be scheduled to be executed as soon as possible.
*
* @param task
* the task to schedule.
* @param when
* time of execution.
* @throws IllegalArgumentException
* if {@code when.getTime() < 0}.
* @throws IllegalStateException
* if the {@code Timer} has been canceled, or if the task has been
* scheduled or canceled.
*/
public void schedule(TimerTask task, Date when)
{
if (when.getTime() < 0)
{
throw new java.lang.IllegalArgumentException();
}
long delay = when.getTime() - java.lang.SystemJ.currentTimeMillis();
scheduleImpl(task, delay < 0 ? 0 : delay, -1, false);
}
public void insert(TimerTask task)
{
if (timers.Length == size)
{
TimerTask[] appendedTimers = new TimerTask[size * 2];
java.lang.SystemJ.arraycopy(timers, 0, appendedTimers, 0, size);
timers = appendedTimers;
}
timers[size++] = task;
upHeap();
}
internal int getTask(TimerTask task)
{
for (int i = 0; i < timers.Length; i++)
{
if (timers[i] == task)
{
return(i);
}
}
return(-1);
}
private void upHeap()
{
int current = size - 1;
int parent = (current - 1) / 2;
while (timers[current].when < timers[parent].when)
{
// swap the two
TimerTask tmp = timers[current];
timers[current] = timers[parent];
timers[parent] = tmp;
// update pos and current
current = parent;
parent = (current - 1) / 2;
}
}
/*
* Schedule a task.
*/
private void scheduleImpl(TimerTask task, long delay, long period,
bool fixedJ)
{
lock (impl) {
if (impl.cancelled)
{
throw new java.lang.IllegalStateException("Timer was cancelled"); //$NON-NLS-1$
}
long when = delay + java.lang.SystemJ.currentTimeMillis();
if (when < 0)
{
throw new java.lang.IllegalArgumentException("Illegal delay to start the TimerTask"); //$NON-NLS-1$
}
lock (task.lockJ) {
if (task.isScheduled())
{
throw new java.lang.IllegalStateException("TimerTask is scheduled already"); //$NON-NLS-1$
}
if (task.cancelled)
{
throw new java.lang.IllegalStateException("TimerTask is cancelled"); //$NON-NLS-1$
}
task.when = when;
task.period = period;
task.fixedRate = fixedJ;
}
// insert the newTask into queue
impl.insertTask(task);
}
}
internal void insertTask(TimerTask newTask)
{
// callers are synchronized
tasks.insert(newTask);
this.notify();
}
internal int getTask(TimerTask task)
{
for (int i = 0; i < timers.Length; i++)
{
if (timers[i] == task)
{
return i;
}
}
return -1;
}
public void insert(TimerTask task)
{
if (timers.Length == size)
{
TimerTask[] appendedTimers = new TimerTask[size * 2];
java.lang.SystemJ.arraycopy(timers, 0, appendedTimers, 0, size);
timers = appendedTimers;
}
timers[size++] = task;
upHeap();
}
/*
* Schedule a task.
*/
private void scheduleImpl(TimerTask task, long delay, long period,
bool fixedJ)
{
lock (impl) {
if (impl.cancelled) {
throw new java.lang.IllegalStateException("Timer was cancelled"); //$NON-NLS-1$
}
long when = delay + java.lang.SystemJ.currentTimeMillis();
if (when < 0) {
throw new java.lang.IllegalArgumentException("Illegal delay to start the TimerTask"); //$NON-NLS-1$
}
lock (task.lockJ) {
if (task.isScheduled()) {
throw new java.lang.IllegalStateException("TimerTask is scheduled already"); //$NON-NLS-1$
}
if (task.cancelled) {
throw new java.lang.IllegalStateException("TimerTask is cancelled"); //$NON-NLS-1$
}
task.when = when;
task.period = period;
task.fixedRate = fixedJ;
}
// insert the newTask into queue
impl.insertTask(task);
}
}
/**
* Schedule a task for repeated fixed-rate execution after a specific time
* has been reached.
*
* @param task
* the task to schedule.
* @param when
* time of first execution.
* @param period
* amount of time in milliseconds between subsequent executions.
* @throws IllegalArgumentException
* if {@code when.getTime() < 0} or {@code period < 0}.
* @throws IllegalStateException
* if the {@code Timer} has been canceled, or if the task has been
* scheduled or canceled.
*/
public void scheduleAtFixedRate(TimerTask task, Date when, long period)
{
if (period <= 0 || when.getTime() < 0) {
throw new java.lang.IllegalArgumentException();
}
long delay = when.getTime() - java.lang.SystemJ.currentTimeMillis();
scheduleImpl(task, delay, period, true);
}
/**
* Schedule a task for repeated fixed-rate execution after a specific delay
* has passed.
*
* @param task
* the task to schedule.
* @param delay
* amount of time in milliseconds before first execution.
* @param period
* amount of time in milliseconds between subsequent executions.
* @throws IllegalArgumentException
* if {@code delay < 0} or {@code period < 0}.
* @throws IllegalStateException
* if the {@code Timer} has been canceled, or if the task has been
* scheduled or canceled.
*/
public void scheduleAtFixedRate(TimerTask task, long delay, long period)
{
if (delay < 0 || period <= 0) {
throw new java.lang.IllegalArgumentException();
}
scheduleImpl(task, delay, period, true);
}
/**
* Schedule a task for single execution after a specified delay.
*
* @param task
* the task to schedule.
* @param delay
* amount of time in milliseconds before execution.
* @throws IllegalArgumentException
* if {@code delay < 0}.
* @throws IllegalStateException
* if the {@code Timer} has been canceled, or if the task has been
* scheduled or canceled.
*/
public void schedule(TimerTask task, long delay)
{
if (delay < 0) {
throw new java.lang.IllegalArgumentException();
}
scheduleImpl(task, delay, -1, false);
}
/**
* Schedule a task for single execution. If {@code when} is less than the
* current time, it will be scheduled to be executed as soon as possible.
*
* @param task
* the task to schedule.
* @param when
* time of execution.
* @throws IllegalArgumentException
* if {@code when.getTime() < 0}.
* @throws IllegalStateException
* if the {@code Timer} has been canceled, or if the task has been
* scheduled or canceled.
*/
public void schedule(TimerTask task, Date when)
{
if (when.getTime() < 0) {
throw new java.lang.IllegalArgumentException();
}
long delay = when.getTime() - java.lang.SystemJ.currentTimeMillis();
scheduleImpl(task, delay < 0 ? 0 : delay, -1, false);
}
internal void insertTask(TimerTask newTask)
{
// callers are synchronized
tasks.insert(newTask);
this.notify();
}
