queue.h

///\file

/******************************************************************************
The MIT License(MIT)

Embedded Template Library.

Copyright(c) 2014 jwellbelove

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******************************************************************************/

#ifndef __ETL_QUEUE__
#define __ETL_QUEUE__

#include <stddef.h>

#include "iqueue.h"
#include "container.h"

//*****************************************************************************
///\defgroup queue queue
/// A First-in / first-out queue with the capacity defined at compile time,
/// written in the STL style.
///\note Uses a predefined array, so MAX_SIZE_ elements will be always be constructed.
///\ingroup containers
//*****************************************************************************

namespace etl
{
  //***************************************************************************
  ///\ingroup queue
  /// A fixed capacity queue.
  /// This queue does not support concurrent access by different threads.
  /// \tparam T    The type this queue should support.
  /// \tparam SIZE The maximum capacity of the queue.
  //***************************************************************************
  template <typename T, const size_t SIZE>
  class queue : public iqueue<T>
  {
  public:

    //*************************************************************************
    /// Default constructor.
    //*************************************************************************
    queue()
      : iqueue<T>(buffer, SIZE)
    {
    }

    //*************************************************************************
    /// Swap
    //*************************************************************************
    void swap(queue& other)
    {
      std::swap_ranges(etl::begin(buffer), etl::end(buffer), etl::begin(other.buffer));
      std::swap(this->in, other.in);
      std::swap(this->out, other.out);
      std::swap(this->current_size, other.current_size);
    }

  private:

    T buffer[SIZE]; ///< The internal buffer.
  };

  //*************************************************************************
  /// Swap
  //*************************************************************************
  template <typename T, const size_t MAX_SIZE>
  void swap(etl::queue<T, MAX_SIZE>& first, etl::queue<T, MAX_SIZE>& second)
  {
    first.swap(second);
  }
}

#endif