////////////////////////////////////////////////////////////////////////////////
/// DISCLAIMER
///
/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
/// Copyright 2004-2014 triAGENS 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 Achim Brandt
////////////////////////////////////////////////////////////////////////////////

#ifndef LIB_BASICS_SPIN_LOCK_H
#define LIB_BASICS_SPIN_LOCK_H 1

#include "Basics/Common.h"
#include "Basics/locks.h"

namespace triagens {
namespace basics {


////////////////////////////////////////////////////////////////////////////////
/// @brief spinlock
////////////////////////////////////////////////////////////////////////////////

class SpinLock {
 private:
  SpinLock(SpinLock const&) = delete;
  SpinLock& operator=(SpinLock const&) = delete;

  
 public:
  //////////////////////////////////////////////////////////////////////////////
  /// @brief constructs a spinlock
  //////////////////////////////////////////////////////////////////////////////

  SpinLock();

  //////////////////////////////////////////////////////////////////////////////
  /// @brief deletes the spinlock
  //////////////////////////////////////////////////////////////////////////////

  ~SpinLock();

  
 public:
  //////////////////////////////////////////////////////////////////////////////
  /// @brief acquires the lock
  //////////////////////////////////////////////////////////////////////////////

  void lock();

  //////////////////////////////////////////////////////////////////////////////
  /// @brief releases the lock
  //////////////////////////////////////////////////////////////////////////////

  void unlock();

  
 private:
  //////////////////////////////////////////////////////////////////////////////
  /// @brief spinlock variable
  //////////////////////////////////////////////////////////////////////////////

  TRI_spin_t _lock;
};
}
}

#endif