fdt.h

代码在ti的c67系列单片机上实现了完整的TCPIP协议栈

//--------------------------------------------------------------------------
// Streaming/Socket IO Layer
//--------------------------------------------------------------------------
// SIO.H
//
// Author: Michael A. Denio
// Copyright 1999 by Texas Instruments Inc.
//-------------------------------------------------------------------------

// Task Manager Equates
#define FD_MAX          24              // Number of FD per table

// File Descriptor Table
typedef struct _fdtable {
        uint             Type;          // Set to HTYPE_FDTABLE
        HANDLE           hOwner;        // Owning Task
        HANDLE           hSem;          // File Event semaphore
        int              Evented;       // Flag if we were "evented"
        int              error;         // FileOp Error Number
        struct _filedesc *pfd[FD_MAX];  // FD List
      } FDTABLE;

// File Descriptor
typedef struct _filedesc {
        uint            Type;           // Set to HTYPE_FD
        uint            fdType;         // File Type
#define FDTYPE_ANY      0
#define FDTYPE_SOCKET   1
#define FDTYPE_PIPE     2
        uint            EventFlags;     // Event Flags
        struct _fdtable *pfdt;          // Owning FDTable
        int             fd;             // Appication's FD (1 to 'n')
        HANDLE          hSock;          // Corresponding socket
      } FILEDESC;


//--------------------------------------------------------------------
//
// Private Functions
//
extern int      fdint_new( FDTABLE *pfdt, FILEDESC **ppfd, uint fdType );
extern void     fdint_free( FILEDESC *pfd );
extern int      fdint_close( FILEDESC *pfd );
extern FILEDESC *fdint_verify( int fd, uint fdType );
extern FDTABLE  *fdint_getfdt( HANDLE hTask );
extern void     fdint_clearevent( FDTABLE *pfdt );
extern void     fdint_signalevent( FDTABLE *pfdt );
extern void     fdint_signaltimeout( FDTABLE *pfdt );
extern void     fdint_waitevent( FDTABLE *pfdt, UINT32 timeout );