/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package org.graalvm.compiler.jtt.jdk;

import org.graalvm.compiler.api.directives.GraalDirectives;

import org.graalvm.compiler.jtt.JTTTest;

import org.junit.Test;

/**

 * Checks that the time between 2 successive calls to {@link System#nanoTime()} is less than 30

 * microseconds at least once in 5_000_000 attempts.

 */

public class System_nanoTime02 extends JTTTest {

    public static boolean test() {

        for (int i = 0; i < 5_000_000; i++) {

            long delta = System.nanoTime() - System.nanoTime();

            if (delta < 30_000) {

                return true;

            }

        }

        if (!GraalDirectives.inCompiledCode()) {

            // We don't care about the result for the interpreter, C1 or C2

            return true;

        }

        return false;

    }

    @Test

    public void run0() throws Throwable {

        runTest("test");

    }

}