/*
 *  ******************************************************************************
 *  *
 *  *
 *  * This program and the accompanying materials are made available under the
 *  * terms of the Apache License, Version 2.0 which is available at
 *  * https://www.apache.org/licenses/LICENSE-2.0.
 *  *
 *  *  See the NOTICE file distributed with this work for additional
 *  *  information regarding copyright ownership.
 *  * Unless required by applicable law or agreed to in writing, software
 *  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 *  * License for the specific language governing permissions and limitations
 *  * under the License.
 *  *
 *  * SPDX-License-Identifier: Apache-2.0
 *  *****************************************************************************
 */

package org.deeplearning4j.core.util;

import java.util.concurrent.locks.LockSupport;

public class ThreadUtils {
    public static void uncheckedSleep(long millis) {
        LockSupport.parkNanos(millis * 1000000);
        // we must check the interrupted status in case this is used in a loop
        // Otherwise we may end up spinning 100% without breaking out on an interruption
        if (Thread.currentThread().isInterrupted()) {
            throw new UncheckedInterruptedException();
        }
    }

    public static void uncheckedSleepNanos(long nanos) {
        LockSupport.parkNanos(nanos);
        // we must check the interrupted status in case this is used in a loop
        // Otherwise we may end up spinning 100% without breaking out on an interruption
        if (Thread.currentThread().isInterrupted()) {
            throw new UncheckedInterruptedException();
        }
    }
    
    /**
     * Similar to {@link InterruptedException} in concept, but unchecked.  Allowing this to be thrown without being 
     * explicitly declared in the API.
     */
    public static class UncheckedInterruptedException extends RuntimeException {
	
    }
}
