gtmpscbuf.h

Curtiss-Wright Controls Embedded Computing公司的cw183板bsp源代码

/* gtMpscBuf.h - header file for Mpsc buffer management */

/**********************************************************************
 *
 *   Copyright (c) 2003-2004, Dy 4 Systems All rights reserved.
 *   This Source Code is the Property of Dy 4 Systems Inc. and can
 *   only be used in accordance with Source Code License
 *   Agreement of Dy 4 Systems Inc. dba (doing business as) 
 *   CURTISS-WRIGHT CONTROLS EMBEDDED COMPUTING, "CWCEC".
 *
 **********************************************************************/

/*
 modification history
--------------------
 01nov02, deb    PTR Initial release
*/

#ifndef GT_MPSCBUF_H
#define GT_MPSCBUF_H

#ifdef __cplusplus
extern "C" {
#endif

 /********************************
 ********  LOCAL STRUCTS  ********
 *********************************/
/* device and channel structures */
typedef struct {
  unsigned char * buf;     /* location of bytes */
  
  int read;                /* index into current read frame */
  int write;               /* index into current write frame */

  int size;                /* size of buf */
} GT_MPSCBUF_STREAM;

typedef struct {
  unsigned char * buf;     /* data */

  int size;                /* amount of data */
  int read;                /* used by gtMpscHw */

  int maxSize;             /* maximum amount of data */
} GT_MPSCBUF_FRAME;

typedef struct {
  int size;                /* number of frames in the buffer */

  int read;                /* read frame */
  int write;               /* write frame */

  GT_MPSCBUF_FRAME * frames;  /* used in GT_MPSC_FRAME mode */
} GT_MPSCBUF_FRAMES;

 /********************************
 **      FUNCTION PROTOTYPES    **
 *********************************/
int gtMpscBufPackedSize( int dataSize, int charSize );
int gtMpscBufUnpackedSize( int packedDataSize, int charSize );
int gtMpscBufPackBytes( unsigned char * dst, int dstSize,unsigned char * src, int srcSize,int charSize );
int gtMpscBufUnpackBytes( unsigned char * dst, int dstSize,unsigned char * src, int srcSize,int charSize );

/* frame buffer */
int gtMpscBufNumFrames( GT_MPSCBUF_FRAMES * buffer );
int gtMpscBufCreateFrames( GT_MPSCBUF_FRAMES * buffer, char ** bufs, int frameSize, int numFrames );
int gtMpscBufDeleteFrames( GT_MPSCBUF_FRAMES * buffer );
int gtMpscBufReadFrame( GT_MPSCBUF_FRAMES * buffer, char * bytes, int size,int charSize);
int gtMpscBufWriteFrame( GT_MPSCBUF_FRAMES * buffer, char * bytes, int size,int charSize);
int gtMpscBufReadFrameSize( GT_MPSCBUF_FRAMES * buffer );
int gtMpscBufWriteFrameSize( GT_MPSCBUF_FRAMES * buffer );
int gtMpscBufWriteFrameByte( GT_MPSCBUF_FRAMES * buffer, unsigned char byte );
int gtMpscBufReadFrameByte( GT_MPSCBUF_FRAMES * buffer, unsigned char *  byte );
void gtMpscBufFlushFrames( GT_MPSCBUF_FRAMES * buffer );

/* stream buffer */

int gtMpscBufCreateStream( GT_MPSCBUF_STREAM * buffer, int size );
void gtMpscBufDeleteStream( GT_MPSCBUF_STREAM * buffer );
int gtMpscBufStreamSize( GT_MPSCBUF_STREAM * buffer );
int gtMpscBufStreamAvailable( GT_MPSCBUF_STREAM * buffer );
int gtMpscBufReadStream( GT_MPSCBUF_STREAM * buffer, char * bytes, int size, unsigned char mask );
int gtMpscBufWriteStream( GT_MPSCBUF_STREAM * buffer, char * bytes,int size, unsigned char mask );
int gtMpscBufReadStreamByte( GT_MPSCBUF_STREAM * buffer, char * byte );
int gtMpscBufWriteStreamByte( GT_MPSCBUF_STREAM * buffer, char byte );
void gtMpscBufFlushStream( GT_MPSCBUF_STREAM * buffer );

 

#ifdef __cplusplus
}
#endif

#endif /* GT_MPSCBUF_H */