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//==========================================================================

//

//      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.

//

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// 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_NFILE

struct 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 file

struct 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_