io.engineblock.activityimpl.marker.longheap.TreeTracker1024 Maven / Gradle / Ivy

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The driver API for engineblock; Provides the interfaces needed to build drivers that can be loaded by engineblock core

There is a newer version: 2.12.65

package io.engineblock.activityimpl.marker.longheap;

/**
 * Wrap 32 of the 32-position LongTreeTrackers together, allowing
 * for a range of 0-1023 positions.
 */
public class TreeTracker1024 {
    private long base = 0L;

    private LongTreeTracker ranges = new LongTreeTracker();
    private LongTreeTracker[] buckets = new LongTreeTracker[32];

    public TreeTracker1024(long base) {
        this.base = base;
        for (int p = 0; p < buckets.length; p++) {
            buckets[p] = new LongTreeTracker();
        }
    }

    public TreeTracker1024() {
        this(0L);
    }

    public void setPositionChecked(long position) {
        if ((position - base) < 0) {
            throw new RuntimeException("position must be greater than or equal to base of " + base);
        }
        if ((position - base) > 1023) {
            throw new RuntimeException("postion must be less than or equal to 1023 + base of " + base);
        }
        setPosition(position);
    }

    public void setPosition(long position) {
        long ranged = position - base;
        int bucket = (int) ranged >> 5;
        long bucketPosition = ranged & 0b11111L;

        if ((buckets[bucket].setCompleted(bucketPosition) & 2L)>0) {
            this.ranges.setCompleted(bucket);
        }
    }

    public boolean isCompleted(long position) {
        long ranged = position - base;
        int bucket = (int) ranged >> 5;
        long innerPos = ranged & 0b11111L;
        return buckets[bucket].isCompleted(innerPos);
    }

    public long getLowestCompleted() {
        long lowestCompleted=base;
        int lowestBucket = (int) ranges.getLowestCompleted();
        lowestCompleted += (lowestBucket+1) * 32;
        lowestCompleted += buckets[lowestBucket+1].getLowestCompleted();
        return lowestCompleted;
    }

    public boolean isCompleted() {
        return this.ranges.isCompleted();
    }
}