chr_buf.h

Rabbit 32Bit RTOS源代码

/*********************************************************************
*                   Copyright (c) 2011-2012,李士伟
*                     All rights reserved.
*文 件 名：chr_buf.h
*描    述：字符设备缓冲区管理模块头文件
*当前版本：V1.00
*作    者：李士伟
*创建日期：2012.01.01
**********************************************************************/
#ifndef __CHR_BUF_H__
#define __CHR_BUF_H__
#include <kernel\typedef.h>
#include <kernel\kds.h>

#define OS_BUF_OUTPUT_LOCK   1
#define OS_BUF_INPUT_LOCK    2

/*********************************************************************
*结构体名：struct os_chr_bcb (OS_CHR_BCB)
*描    述：字符缓冲区控制块
**********************************************************************/
typedef struct os_chr_bcb
{
    INT32U  BufLock;  /* 缓冲区控制锁 */ 
    INT32U  BufTotalSize;
    INT32U  BufSavedSize;
    INT8U  *BufStart;
    INT8U  *BufEnd;
    INT8U  *BufIn;
    INT8U  *BufOut;

}OS_CHR_BCB;

#ifdef __cplusplus
extern "C" {
#endif
extern OS_CHR_BCB *OS_CreateChrBuf(INT32U buf_size);
extern INT32U OS_FreeChrBuf(OS_CHR_BCB *pbcb);

extern INT32U OS_PutChrBufNBytes(OS_CHR_BCB *pbcb, INT8U *s, INT32U n);
extern INT32U OS_GetChrBufNBytes(OS_CHR_BCB *pbcb, INT8U *s, INT32U n);
extern INT32U OS_GetChrBufByte(OS_CHR_BCB *pbcb, INT8U *ch);
extern INT32U OS_PutChrBufByte(OS_CHR_BCB *pbcb, INT8U ch);
#ifdef __cplusplus
}
#endif

#endif