//==========================================================================////      io/common/include/file.h////      Defines for high level file I/O////==========================================================================//####ECOSGPLCOPYRIGHTBEGIN####// -------------------------------------------// This file is part of eCos, the Embedded Configurable Operating System.// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.//// eCos is free software; you can redistribute it and/or modify it under// the terms of the GNU General Public License as published by the Free// Software Foundation; either version 2 or (at your option) any later version.//// eCos is distributed in the hope that it will be useful, but WITHOUT ANY// WARRANTY; without even the implied warranty of MERCHANTABILITY or// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License// for more details.//// You should have received a copy of the GNU General Public License along// with eCos; if not, write to the Free Software Foundation, Inc.,// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.//// As a special exception, if other files instantiate templates or use macros// or inline functions from this file, or you compile this file and link it// with other works to produce a work based on this file, this file does not// by itself cause the resulting work to be covered by the GNU General Public// License. However the source code for this file must still be made available// in accordance with section (3) of the GNU General Public License.//// This exception does not invalidate any other reasons why a work based on// this file might be covered by the GNU General Public License.//// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.// at http://sources.redhat.com/ecos/ecos-license/// -------------------------------------------//####ECOSGPLCOPYRIGHTEND####//==========================================================================//#####DESCRIPTIONBEGIN####//// Author(s):    gthomas// Contributors: gthomas// Date:         2000-01-10// Purpose:      // Description:  //              ////####DESCRIPTIONEND####////==========================================================================#ifndef _CYG_IO_FILE_H_#define _CYG_IO_FILE_H_#include <pkgconf/system.h>//==========================================================================// If the fileio package is loaded, we need to go through that to do all// basic IO operations. This code redefines the tags on the structures so// that they have the names expected by BSD based code.#ifdef CYGPKG_IO_FILEIO#include <pkgconf/io_fileio.h>#define CYG_IOVEC_TAG iovec#define CYG_UIO_TAG uio#define CYG_FILEOPS_TAG fileops#define CYG_FILE_TAG file#define CYG_SELINFO_TAG selinfo#include <cyg/fileio/fileio.h>// File states#define FREAD      CYG_FREAD#define FWRITE     CYG_FWRITE#define FNONBLOCK  CYG_FNONBLOCK#define FASYNC     CYG_FASYNC// Type of "file"#define	DTYPE_VNODE	CYG_FILE_TYPE_FILE	/* file */#define	DTYPE_SOCKET	CYG_FILE_TYPE_SOCKET	/* communications endpoint *///==========================================================================// Otherwise define all the structs here...#else // CYGPKG_IO_FILEIO// High-level file I/O interfaces// Derived [in part] from OpenBSD <sys/file.h>, <sys/uio.h>, <sys/fcntl.h>#include <pkgconf/io.h>#include <cyg/infra/cyg_type.h>#define NFILE CYGPKG_IO_NFILEstruct iovec {    void           *iov_base;   /* Base address. */    CYG_ADDRWORD   iov_len;     /* Length. */};enum	uio_rw { UIO_READ, UIO_WRITE };/* Segment flag values. */enum uio_seg {    UIO_USERSPACE,		/* from user data space */    UIO_SYSSPACE		/* from system space */};struct uio {    struct	iovec *uio_iov;	/* pointer to array of iovecs */    int	uio_iovcnt;	/* number of iovecs in array */    CYG_ADDRWORD	uio_offset;	/* offset into file this uio corresponds to */    CYG_ADDRWORD	uio_resid;	/* residual i/o count */    enum	uio_seg uio_segflg; /* see above */    enum	uio_rw uio_rw;	/* see above */};/* * Limits */#define UIO_SMALLIOV	8		/* 8 on stack, else malloc */// Description of open filestruct file {    short	f_flag;		/* file state */    short	f_type;		/* descriptor type */    struct	fileops {        int	(*fo_read)(struct file *fp, struct uio *uio);        int	(*fo_write)(struct file *fp, struct uio *uio);        int	(*fo_ioctl)(struct file *fp, CYG_ADDRWORD com,                            CYG_ADDRWORD data);        int	(*fo_select)(struct file *fp, int which);        int	(*fo_close)(struct file *fp);    } *f_ops;    CYG_ADDRWORD	f_offset;    CYG_ADDRWORD	f_data;		/* vnode or socket */};// File states#define FREAD      0x01#define FWRITE     0x02#define FNONBLOCK  0x10#define FASYNC     0x20#define FALLOC     0x80         // File is "busy", i.e. allocated// Type of "file"#define	DTYPE_VNODE	1	/* file */#define	DTYPE_SOCKET	2	/* communications endpoint */#define	DTYPE_PIPE	3	/* pipe */externC cyg_bool getfp(int fdes, struct file **fp);externC int falloc(struct file **fp, int *fd);externC void ffree(struct file *fp);//==========================================================================#endif // CYGPKG_IO_FILEIO//==========================================================================#endif // _CYG_IO_FILE_H_