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/**
******************************************************************************
* @file stm_queue.h
* @author MCD Application Team
* @brief Header for stm_queue.c
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2019 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __STM_QUEUE_H
#define __STM_QUEUE_H
/* Includes ------------------------------------------------------------------*/
/* Exported define -----------------------------------------------------------*/
/* Options flags */
#define CIRCULAR_QUEUE_NO_FLAG 0
#define CIRCULAR_QUEUE_NO_WRAP_FLAG 1
#define CIRCULAR_QUEUE_SPLIT_IF_WRAPPING_FLAG 2
/* Exported types ------------------------------------------------------------*/
typedef struct {
uint8_t* qBuff; /* queue buffer, , provided by init fct */
uint32_t queueMaxSize; /* size of the queue, provided by init fct (in bytes)*/
uint16_t elementSize; /* -1 variable. If variable elemenet size the size is stored in the 4 first of the queue element */
uint32_t first; /* position of first element */
uint32_t last; /* position of last element */
uint32_t byteCount; /* number of bytes in the queue */
uint32_t elementCount; /* number of element in the queue */
uint8_t optionFlags; /* option to enable specific features */
} queue_t;
/* Exported constants --------------------------------------------------------*/
/* Exported macro ------------------------------------------------------------*/
/* Exported functions ------------------------------------------------------- */
int CircularQueue_Init(queue_t *q, uint8_t* queueBuffer, uint32_t queueSize, uint16_t elementSize, uint8_t optionlags);
uint8_t* CircularQueue_Add(queue_t *q, uint8_t* x, uint16_t elementSize, uint32_t nbElements);
uint8_t* CircularQueue_Remove(queue_t *q, uint16_t* elementSize);
uint8_t* CircularQueue_Sense(queue_t *q, uint16_t* elementSize);
int CircularQueue_Empty(queue_t *q);
int CircularQueue_NbElement(queue_t *q);
uint8_t* CircularQueue_Remove_Copy(queue_t *q, uint16_t* elementSize, uint8_t* buffer);
uint8_t* CircularQueue_Sense_Copy(queue_t *q, uint16_t* elementSize, uint8_t* buffer);
/******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/
#endif /* __STM_QUEUE_H */
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