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package com.mbien.opencl;
import com.jogamp.common.nio.PointerBuffer;
import java.util.Iterator;
/**
* Fixed size list for storing CLEvents.
* @author Michael Bien
*/
public final class CLEventList implements CLResource, Iterable<CLEvent> {
private final CLEvent[] events;
final PointerBuffer IDs;
int size;
public CLEventList(int capacity) {
this.events = new CLEvent[capacity];
this.IDs = PointerBuffer.allocateDirect(capacity);
}
void createEvent(CLContext context) {
if(events[size] != null)
events[size].release();
events[size] = new CLEvent(context, IDs.get());
size++;
}
/**
* Releases all CLEvents in this list.
*/
public void release() {
for (int i = 0; i < size; i++) {
events[i].release();
events[i] = null;
}
size = 0;
IDs.rewind();
}
public void close() {
release();
}
public CLEvent getEvent(int index) {
if(index >= size)
throw new IndexOutOfBoundsException("list contains "+size+" events, can not return event with index "+index);
return events[index];
}
/**
* Returns the current size of this list.
*/
public int size() {
return size;
}
/**
* Returns the maximum size of this list.
*/
public int capacity() {
return events.length;
}
public Iterator<CLEvent> iterator() {
return new EventIterator(events, size);
}
private static class EventIterator implements Iterator<CLEvent> {
private final CLEvent[] events;
private final int size;
private int index;
private EventIterator(CLEvent[] events, int size) {
this.events = events;
this.size = size;
}
public boolean hasNext() {
return index < size;
}
public CLEvent next() {
if(hasNext())
return events[index++];
else
return null;
}
public void remove() {
throw new UnsupportedOperationException("remove() not supported.");
}
}
}
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