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package com.firefly.utils.concurrent;

import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;

public class Atomics {
	private Atomics() {
	}

	public static boolean updateMin(AtomicLong currentMin, long newValue) {
		long oldValue = currentMin.get();
		while (newValue < oldValue) {
			if (currentMin.compareAndSet(oldValue, newValue))
				return true;
			oldValue = currentMin.get();
		}
		return false;
	}

	public static boolean updateMax(AtomicLong currentMax, long newValue) {
		long oldValue = currentMax.get();
		while (newValue > oldValue) {
			if (currentMax.compareAndSet(oldValue, newValue))
				return true;
			oldValue = currentMax.get();
		}
		return false;
	}

	public static boolean updateMin(AtomicInteger currentMin, int newValue) {
		int oldValue = currentMin.get();
		while (newValue < oldValue) {
			if (currentMin.compareAndSet(oldValue, newValue))
				return true;
			oldValue = currentMin.get();
		}
		return false;
	}

	public static boolean updateMax(AtomicInteger currentMax, int newValue) {
		int oldValue = currentMax.get();
		while (newValue > oldValue) {
			if (currentMax.compareAndSet(oldValue, newValue))
				return true;
			oldValue = currentMax.get();
		}
		return false;
	}
}