content: /*******************************************************************************
   * Software Name : RCS IMS Stack
   * <p/>
   * Copyright (C) 2010-2016 Orange.
   * <p/>
   * 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
   * <p/>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p/>
   * 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 com.gsma.rcs.api.connection.utils;
  
  import java.util.concurrent.atomic.AtomicBoolean;
  
  /**
   * An object to lock access to a resource
   *
   * @author Philippe LEMORDANT
   */
  public class LockAccess {
  
      /**
       * The locker object
       */
      AtomicBoolean locker = new AtomicBoolean();
  
      /**
       * Acquires the lock only if it is not already locked at the time of invocation
       *
       * @return true is resource is unlocked
       */
      public boolean tryLock() {
          return locker.compareAndSet(false, true);
      }
  
      /**
       * Checks if access is locked
       *
       * @return True if access is locked
       */
      public boolean isLocked() {
          return locker.get();
      }
  }
  