content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * 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.
   */
  
  package org.apache.cassandra.simulator.systems;
  
  import org.apache.cassandra.utils.concurrent.Awaitable;
  import org.apache.cassandra.utils.concurrent.Condition;
  
  import static org.apache.cassandra.utils.Clock.Global.nanoTime;
  
  public class NotInterceptedSyncCondition extends Awaitable.AbstractAwaitable implements Condition
  {
      private volatile boolean isSignalled;
  
      @Override
      public synchronized boolean awaitUntil(long nanoTimeDeadline) throws InterruptedException
      {
          while (true)
          {
              if (isSignalled()) return true;
              if (!notInterceptedWaitUntil(this, nanoTimeDeadline)) return false;
          }
      }
  
      @Override
      public synchronized Awaitable await() throws InterruptedException
      {
          while (!isSignalled)
              wait();
          return this;
      }
  
      @Override
      public boolean isSignalled()
      {
          return isSignalled;
      }
  
      @Override
      public synchronized void signal()
      {
          isSignalled = true;
          notifyAll();
      }
  
      private static boolean notInterceptedWaitUntil(Object monitor, long deadlineNanos) throws InterruptedException
      {
          long wait = deadlineNanos - nanoTime();
          if (wait <= 0)
              return false;
  
          wait = (wait + 999999) / 1000000;
          if (wait < 0)
              wait = Long.MAX_VALUE;
          monitor.wait(wait);
          return true;
      }
  }
  