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/*
 * Copyright 2015, Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *    * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above
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 * in the documentation and/or other materials provided with the
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 *
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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package org.glowroot.agent.shaded.grpc.internal;

/**
 * A reference-counted object that requires explicit deallocation.
 */
public interface ReferenceCounted {
  /**
   * Gets the current reference count.
   */
  int referenceCount();

  /**
   * Increases the reference count by 1.
   */
  ReferenceCounted retain();

  /**
   * Decreases the reference count by {@code 1} and deallocates this object if the reference count
   * reaches at {@code 0}.
   *
   * @return {@code true} if and only if the reference count became {@code 0} and this object has
   *         been deallocated
   */
  ReferenceCounted release();
}