code: /*
   * Copyright 2012-2018 Chronicle Map Contributors
   *
   * Licensed 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 net.openhft.chronicle.hash.impl.stage.entry;
  
  import net.openhft.sg.Stage;
  import net.openhft.sg.StageRef;
  import net.openhft.sg.Staged;
  
  @Staged
  public abstract class HashLookupPos {
  
      public long hashLookupPos = -1;
      @StageRef
      HashLookupSearch hls;
      @StageRef
      SegmentStages s;
  
      public abstract boolean hashLookupPosInit();
  
      public void initHashLookupPos() {
          // Validation + make hashLookupPos a dependant of tier. This is needed, because after
          // tier change should re-perform hashLookupSearch, starting from the searchStartPos.
          // Not an assert statement, because segmentTier stage should be initialized regardless
          // assertions enabled or not.
          if (s.tier < 0)
              throw new AssertionError();
          s.innerReadLock.lock();
          this.hashLookupPos = hls.searchStartPos;
      }
  
      public void initHashLookupPos(long hashLookupPos) {
          this.hashLookupPos = hashLookupPos;
      }
  
      @Stage("HashLookupPos")
      public void setHashLookupPos(long hashLookupPos) {
          this.hashLookupPos = hashLookupPos;
      }
  
      public abstract void closeHashLookupPos();
  }
  