Pow2.java

package teetime.util.concurrent.spsc;

public class Pow2 {

	private Pow2() {
		// utility class
	}

	public static int findNextPositivePowerOfTwo(final int value) {
		return 1 << (32 - Integer.numberOfLeadingZeros(value - 1));
	}

	public static boolean isPowerOf2(final int value) {
		return (value & (value - 1)) == 0;
	}
}