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#ifndef CYGONCE_FILEIO_H

#define CYGONCE_FILEIO_H

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

//

//      fileio.h

//

//      Fileio header

//

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

//####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):     nickg

// Contributors:  nickg

// Date:          2000-05-25

// Purpose:       Fileio header

// Description:   This header contains the external definitions of the general file

//                IO subsystem for POSIX and EL/IX compatability.

//              

// Usage:

//              #include <fileio.h>

//              ...

//              

//

//####DESCRIPTIONEND####

//

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

#include <pkgconf/hal.h>

#include <pkgconf/kernel.h>

#include <pkgconf/io_fileio.h>

#include <cyg/infra/cyg_type.h>

#include <cyg/hal/hal_tables.h>

#include <stddef.h>             // NULL, size_t

#include <limits.h>

#include <sys/types.h>

#include <fcntl.h>

#include <sys/stat.h>

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

// forward definitions

struct cyg_mtab_entry;

typedef struct cyg_mtab_entry cyg_mtab_entry;

struct  cyg_fstab_entry;

typedef struct  cyg_fstab_entry  cyg_fstab_entry;

struct CYG_FILEOPS_TAG;

typedef struct CYG_FILEOPS_TAG cyg_fileops;

struct CYG_FILE_TAG;

typedef struct CYG_FILE_TAG cyg_file;

struct CYG_IOVEC_TAG;

typedef struct CYG_IOVEC_TAG cyg_iovec;

struct CYG_UIO_TAG;

typedef struct CYG_UIO_TAG cyg_uio;

struct CYG_SELINFO_TAG;

typedef struct CYG_SELINFO_TAG cyg_selinfo;

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

// Directory pointer

typedef CYG_ADDRWORD cyg_dir;

#define CYG_DIR_NULL 0

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

// Filesystem table entry

typedef int     cyg_fsop_mount    ( cyg_fstab_entry *fste, cyg_mtab_entry *mte );

typedef int     cyg_fsop_umount   ( cyg_mtab_entry *mte );

typedef int     cyg_fsop_open     ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,

                                    int mode,  cyg_file *fte );

typedef int     cyg_fsop_unlink   ( cyg_mtab_entry *mte, cyg_dir dir, const char *name );

typedef int     cyg_fsop_mkdir    ( cyg_mtab_entry *mte, cyg_dir dir, const char *name );

typedef int     cyg_fsop_rmdir    ( cyg_mtab_entry *mte, cyg_dir dir, const char *name );

typedef int     cyg_fsop_rename   ( cyg_mtab_entry *mte, cyg_dir dir1, const char *name1,

                                    cyg_dir dir2, const char *name2 );

typedef int     cyg_fsop_link     ( cyg_mtab_entry *mte, cyg_dir dir1, const char *name1,

                                    cyg_dir dir2, const char *name2, int type );

typedef int     cyg_fsop_opendir  ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,

                                    cyg_file *fte );

typedef int     cyg_fsop_chdir    ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,

                                    cyg_dir *dir_out );

typedef int     cyg_fsop_stat     ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,

                                    struct stat *buf);

typedef int     cyg_fsop_getinfo  ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,

                                    int key, void *buf, int len );

typedef int     cyg_fsop_setinfo  ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,

                                    int key, void *buf, int len );

struct cyg_fstab_entry

{

    const char          *name;          // filesystem name

    CYG_ADDRWORD        data;           // private data value

    cyg_uint32          syncmode;       // synchronization mode

    cyg_fsop_mount      *mount;

    cyg_fsop_umount     *umount;

    cyg_fsop_open       *open;

    cyg_fsop_unlink     *unlink;

    cyg_fsop_mkdir      *mkdir;

    cyg_fsop_rmdir      *rmdir;

    cyg_fsop_rename     *rename;

    cyg_fsop_link       *link;

    cyg_fsop_opendir    *opendir;

    cyg_fsop_chdir      *chdir;

    cyg_fsop_stat       *stat;

    cyg_fsop_getinfo    *getinfo;

    cyg_fsop_setinfo    *setinfo;

} CYG_HAL_TABLE_TYPE;

//-----------------------------------------------------------------------------

// Keys for getinfo() and setinfo()

#define FS_INFO_CONF            1       /* pathconf() */

#define FS_INFO_ACCESS          2       /* access() */

#define FS_INFO_GETCWD          3       /* getcwd() */

//-----------------------------------------------------------------------------

// Types for link()

#define CYG_FSLINK_HARD         1       /* form a hard link */

#define CYG_FSLINK_SOFT         2       /* form a soft link */

//-----------------------------------------------------------------------------

// getinfo() and setinfo() buffers structures.

struct cyg_getcwd_info

{

    char        *buf;           /* buffer for cwd string */

    size_t      size;           /* size of buffer */

};

//-----------------------------------------------------------------------------

// Macro to define an initialized fstab entry

#define FSTAB_ENTRY( _l, _name, _data, _syncmode, _mount, _umount,      \

                     _open, _unlink,  _mkdir, _rmdir, _rename, _link,   \

                     _opendir, _chdir, _stat, _getinfo, _setinfo)       \

struct cyg_fstab_entry _l CYG_HAL_TABLE_ENTRY(fstab) =                  \

{                                                                       \

    _name,                                                              \

    _data,                                                              \

    _syncmode,                                                          \

    _mount,                                                             \

    _umount,                                                            \

    _open,                                                              \

    _unlink,                                                            \

    _mkdir,                                                             \

    _rmdir,                                                             \

    _rename,                                                            \

    _link,                                                              \

    _opendir,                                                           \

    _chdir,                                                             \

    _stat,                                                              \

    _getinfo,                                                           \

    _setinfo                                                            \

};

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

// Mount table entry

struct cyg_mtab_entry

{

    const char          *name;          // name of mount point

    const char          *fsname;        // name of implementing filesystem

    const char          *devname;       // name of hardware device

    CYG_ADDRWORD        data;           // private data value

    // The following are filled in after a successful mount operation

    cyg_bool            valid;          // Valid entry?

    cyg_fstab_entry     *fs;            // pointer to fstab entry

    cyg_dir             root;           // root directory pointer

} CYG_HAL_TABLE_TYPE;

// This macro defines an initialized mtab entry

#define MTAB_ENTRY( _l, _name, _fsname, _devname, _data )       \

struct cyg_mtab_entry _l CYG_HAL_TABLE_ENTRY(mtab) =            \

{                                                               \

    _name,                                                      \

    _fsname,                                                    \

    _devname,                                                   \

    _data,                                                      \

    false,                                                      \

    NULL,                                                       \

    CYG_DIR_NULL                                                \

};

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

// IO vector descriptors

struct CYG_IOVEC_TAG

{

    void           *iov_base;           /* Base address. */

    ssize_t        iov_len;             /* Length. */

};

enum    cyg_uio_rw { UIO_READ, UIO_WRITE };

/* Segment flag values. */

enum cyg_uio_seg

{

    UIO_USERSPACE,                      /* from user data space */

    UIO_SYSSPACE                        /* from system space */

};

struct CYG_UIO_TAG

{

    struct CYG_IOVEC_TAG *uio_iov;      /* pointer to array of iovecs */

    int                  uio_iovcnt;    /* number of iovecs in array */

    off_t                uio_offset;    /* offset into file this uio corresponds to */

    ssize_t              uio_resid;     /* residual i/o count */

    enum cyg_uio_seg     uio_segflg;    /* see above */

    enum cyg_uio_rw      uio_rw;        /* see above */

};

// Limits

#define UIO_SMALLIOV    8               /* 8 on stack, else malloc */

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

// Description of open file

typedef int cyg_fileop_readwrite (struct CYG_FILE_TAG *fp, struct CYG_UIO_TAG *uio);

typedef cyg_fileop_readwrite cyg_fileop_read;

typedef cyg_fileop_readwrite cyg_fileop_write;

typedef int cyg_fileop_lseek   (struct CYG_FILE_TAG *fp, off_t *pos, int whence );

typedef int cyg_fileop_ioctl   (struct CYG_FILE_TAG *fp, CYG_ADDRWORD com,

                                CYG_ADDRWORD data);

typedef int cyg_fileop_select  (struct CYG_FILE_TAG *fp, int which, CYG_ADDRWORD info);

typedef int cyg_fileop_fsync   (struct CYG_FILE_TAG *fp, int mode );

typedef int cyg_fileop_close   (struct CYG_FILE_TAG *fp);

typedef int cyg_fileop_fstat   (struct CYG_FILE_TAG *fp, struct stat *buf );

typedef int cyg_fileop_getinfo (struct CYG_FILE_TAG *fp, int key, void *buf, int len );

typedef int cyg_fileop_setinfo (struct CYG_FILE_TAG *fp, int key, void *buf, int len );

struct CYG_FILEOPS_TAG

{

    cyg_fileop_read     *fo_read;

    cyg_fileop_write    *fo_write;

    cyg_fileop_lseek    *fo_lseek;

    cyg_fileop_ioctl    *fo_ioctl;

    cyg_fileop_select   *fo_select;

    cyg_fileop_fsync    *fo_fsync;

    cyg_fileop_close    *fo_close;

    cyg_fileop_fstat    *fo_fstat;

    cyg_fileop_getinfo  *fo_getinfo;

    cyg_fileop_setinfo  *fo_setinfo;

};

struct CYG_FILE_TAG

{

    cyg_uint32                  f_flag;         /* file state                   */

    cyg_uint16                  f_ucount;       /* use count                    */

    cyg_uint16                  f_type;         /* descriptor type              */

    cyg_uint32                  f_syncmode;     /* synchronization protocol     */

    struct CYG_FILEOPS_TAG      *f_ops;         /* file operations              */

    off_t                       f_offset;       /* current offset               */

    CYG_ADDRWORD                f_data;         /* file or socket               */

    CYG_ADDRWORD                f_xops;         /* extra type specific ops      */

    cyg_mtab_entry              *f_mte;         /* mount table entry            */

};

//-----------------------------------------------------------------------------

// File flags

// Allocation here is that bits 0..15 are copies of bits from the open

// flags, bits 16..23 are extra bits that are visible to filesystems but

// are not derived from the open call, and bits 24..31 are reserved for

// the fileio infrastructure.

#define CYG_FREAD       O_RDONLY

#define CYG_FWRITE      O_WRONLY

#define CYG_FNONBLOCK   O_NONBLOCK

#define CYG_FAPPEND     O_APPEND

#define CYG_FASYNC      0x00010000

#define CYG_FDIR        0x00020000

#define CYG_FLOCKED     0x01000000  // Set if file is locked

#define CYG_FLOCK       0x02000000  // Lock during file ops

#define CYG_FALLOC      0x80000000  // File is "busy", i.e. allocated

// Mask for open mode bits stored in file object

#define CYG_FILE_MODE_MASK (CYG_FREAD|CYG_FWRITE|CYG_FNONBLOCK|CYG_FAPPEND)

//-----------------------------------------------------------------------------

// Type of file

#define CYG_FILE_TYPE_FILE      1       /* file */

#define CYG_FILE_TYPE_SOCKET    2       /* communications endpoint */

#define CYG_FILE_TYPE_DEVICE    3       /* device */

//-----------------------------------------------------------------------------

// Keys for getinf() and setinfo()

#define FILE_INFO_CONF          1       /* fpathconf() */

//-----------------------------------------------------------------------------

// Modes for fsync()

#define CYG_FSYNC              1

#define CYG_FDATASYNC          2

//-----------------------------------------------------------------------------

// Get/set info buffer structures

// This is used for pathconf() and fpathconf()

struct cyg_pathconf_info

{

    int         name;           // POSIX defined variable name

    long        value;          // Returned variable value

};

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

// Synchronization modes

// These values are filled into the syncmode fields of the above structures

// and define the synchronization protocol used when accessing the object in

// question.

#define CYG_SYNCMODE_NONE               (0)     // no locking required

#define CYG_SYNCMODE_FILE_FILESYSTEM    0x0002  // lock fs during file ops

#define CYG_SYNCMODE_FILE_MOUNTPOINT    0x0004  // lock mte during file ops

#define CYG_SYNCMODE_IO_FILE            0x0010  // lock file during io ops

#define CYG_SYNCMODE_IO_FILESYSTEM      0x0020  // lock fs during io ops

#define CYG_SYNCMODE_IO_MOUNTPOINT      0x0040  // lock mte during io ops

#define CYG_SYNCMODE_SOCK_FILE          0x0100  // lock socket during socket ops

#define CYG_SYNCMODE_SOCK_NETSTACK      0x0800  // lock netstack during socket ops

#define CYG_SYNCMODE_IO_SHIFT           (4)     // shift for IO to file bits

#define CYG_SYNCMODE_SOCK_SHIFT         (8)     // shift for sock to file bits

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

// Mount and umount functions

__externC int mount( const char *devname,

                     const char *dir,

                     const char *fsname);

__externC int umount( const char *name);

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

// Select support

//-----------------------------------------------------------------------------

// Data structure for embedding in client data structures. A pointer to this

// must be passed to cyg_selrecord() and cyg_selwakeup().

struct CYG_SELINFO_TAG

{

    CYG_ADDRWORD        si_info;        // info passed through from fo_select()

    CYG_ADDRESS         si_thread;      // selecting thread pointer

};

//-----------------------------------------------------------------------------

// Select support functions.

// cyg_selinit() is used to initialize a selinfo structure.

__externC void cyg_selinit( struct CYG_SELINFO_TAG *sip );

// cyg_selrecord() is called when a client device needs to register

// the current thread for selection.

__externC void cyg_selrecord( CYG_ADDRWORD info, struct CYG_SELINFO_TAG *sip );

// cyg_selwakeup() is called when the client device matches the select

// criterion, and needs to wake up a selector.

__externC void cyg_selwakeup( struct CYG_SELINFO_TAG *sip );

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

// Timestamp support

// Provides the current time as a time_t timestamp for use in filesystem

// data strucures.

__externC time_t cyg_timestamp(void);

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

// Default functions.

// Cast to the appropriate type, these functions can be put into any of

// the operation table slots to provide the defined error code.

__externC int cyg_fileio_enosys(void);

__externC int cyg_fileio_erofs(void);

__externC int cyg_fileio_enoerr(void);

__externC int cyg_fileio_enotdir(void);

__externC cyg_fileop_select cyg_fileio_seltrue;

//-----------------------------------------------------------------------------

#endif // ifndef CYGONCE_FILEIO_H

// End of fileio.h