////////////////////////////////////////////////////////////////////////////////
/// @brief work item class
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2015 ArangoDB GmbH, Cologne, Germany
///
/// 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.
///
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
///
/// @author Dr. Frank Celler
/// @author Copyright 2015, ArangoDB GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////

#ifndef ARANGODB_UTILS_WORK_ITEM
#define ARANGODB_UTILS_WORK_ITEM 1

namespace arangodb {

// -----------------------------------------------------------------------------
// --SECTION--                                                    class WorkItem
// -----------------------------------------------------------------------------

////////////////////////////////////////////////////////////////////////////////
/// @brief allow unique_ptr to call protected destructor
////////////////////////////////////////////////////////////////////////////////

class WorkItem {

  // ---------------------------------------------------------------------------
  // --SECTION--                                                   inner classes
  // ---------------------------------------------------------------------------

public:
  //////////////////////////////////////////////////////////////////////////////
  /// @brief unique_ptr_deleter
  //////////////////////////////////////////////////////////////////////////////

  struct deleter {
    deleter() = default;

    void operator()(WorkItem *ptr) const { delete ptr; }
  };

  //////////////////////////////////////////////////////////////////////////////
  /// @brief unique_ptr
  //////////////////////////////////////////////////////////////////////////////

  template <typename X> using uptr = std::unique_ptr<X, deleter>;

  // ---------------------------------------------------------------------------
  // --SECTION--                                    constructors and destructors
  // ---------------------------------------------------------------------------

  //////////////////////////////////////////////////////////////////////////////
  /// @brief destructor
  //////////////////////////////////////////////////////////////////////////////

protected:
  virtual ~WorkItem() {}
};
}

#endif

// -----------------------------------------------------------------------------
// --SECTION--                                                       END-OF-FILE
// -----------------------------------------------------------------------------