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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 Free Software Foundation, 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.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public 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_
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