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/* Copyright (C) 2010-2011 Circuits At Home, LTD. All rights reserved.
This software may be distributed and modified under the terms of the GNU
General Public License version 2 (GPL2) as published by the Free Software
Foundation and appearing in the file GPL2.TXT included in the packaging of
this file. Please note that GPL2 Section 2[b] requires that all works based
on this software must also be made publicly available under the terms of
the GPL2 ("Copyleft").
Contact information
-------------------
Circuits At Home, LTD
Web : http://www.circuitsathome.com
e-mail : support@circuitsathome.com
*/
#if !defined(__SIMPLEFIFO_H__)
#define __SIMPLEFIFO_H__
template <class TYPE, const uint8_t SIZE>
class SimpleFIFO
{
TYPE theBuffer[SIZE];
uint8_t tail, head;
private:
void inc(uint8_t &val)
{
val ++;
if (val >= SIZE)
val = 0;
};
public:
SimpleFIFO() :
tail(0),
head(0)
{
};
uint8_t Size()
{
if (tail == head)
return 0;
if (tail > head)
return (tail - head);
else
return (SIZE - head + tail);
};
void Empty()
{
tail = head = 0;
};
void Push(TYPE val)
{
if (Size() >= SIZE-1)
return;
theBuffer[tail] = val;
inc(tail);
// Serial.print(">");
// Serial.print(head,DEC);
// Serial.print(":");
// Serial.print(tail,DEC);
// Serial.print(":");
// Serial.println(Size(),DEC);
};
TYPE Pop()
{
if (head == tail)
return (TYPE)0;
TYPE ret = theBuffer[head];
inc(head);
// Serial.print("<");
// Serial.print(head,DEC);
// Serial.print(":");
// Serial.print(tail,DEC);
// Serial.print(":");
// Serial.println(Size(),DEC);
return ret;
};
};
#endif // __SIMPLEFIFO_H__