RingBuffer.h

/*
  Copyright (c) 2011 Arduino.  All right reserved.
 
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.
 
  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the GNU Lesser General Public License for more details.
 
  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/
 
#ifndef _RING_BUFFER_
#define _RING_BUFFER_
 
#include <stdint.h>
 
// Define constants and variables for buffering incoming serial data.  We're
// using a ring buffer, in which head is the index of the location
// to which to write the next incoming character and tail is the index of the
// location from which to read.
#define SERIAL_BUFFER_SIZE 128
 
class RingBuffer {
  public:
    volatile uint8_t _aucBuffer[SERIAL_BUFFER_SIZE] ;
    volatile int _iHead ;
    volatile int _iTail ;
 
  public:
    RingBuffer(void) ;
    void store_char(uint8_t c) ;
} ;
 
#endif /* _RING_BUFFER_ */