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/*
LUFA Library
Copyright (C) Dean Camera, 2010.
dean [at] fourwalledcubicle [dot] com
www.fourwalledcubicle.com
*/
/*
Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
without fee, provided that the above copyright notice appear in
all copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of the author not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaim all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action,
arising out of or in connection with the use or performance of
this software.
*/
/** \file
*
* Ultra lightweight ring buffer, for fast insertion/deletion.
*/
#ifndef _ULW_RING_BUFF_H_
#define _ULW_RING_BUFF_H_
/* Includes: */
#include <stdint.h>
#include <stdbool.h>
/* Defines: */
/** Size of each ring buffer, in bytes. */
#define BUFFER_SIZE 128
/** Type of data to store into the buffer. */
#define RingBuff_Data_t uint8_t
/* Type Defines: */
typedef struct
{
RingBuff_Data_t Buffer[BUFFER_SIZE];
RingBuff_Data_t* In;
RingBuff_Data_t* Out;
uint8_t Count;
} RingBuff_t;
/* Inline Functions: */
static inline void RingBuffer_InitBuffer(RingBuff_t* const Buffer)
{
Buffer->In = Buffer->Buffer;
Buffer->Out = Buffer->Buffer;
Buffer->Count = 0;
}
static inline void RingBuffer_Insert(RingBuff_t* const Buffer, RingBuff_Data_t Data)
{
*Buffer->In = Data;
if (++Buffer->In == &Buffer->Buffer[BUFFER_SIZE])
Buffer->In = Buffer->Buffer;
Buffer->Count++;
}
static inline RingBuff_Data_t RingBuffer_Remove(RingBuff_t* const Buffer)
{
RingBuff_Data_t Data = *Buffer->Out;
if (++Buffer->Out == &Buffer->Buffer[BUFFER_SIZE])
Buffer->Out = Buffer->Buffer;
Buffer->Count--;
return Data;
}
#endif
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