moss.drivers
Class MDevices

java.lang.Object
  moss.drivers.MDevices

public class MDevices
extends java.lang.Object

this class is used for device-driver management

Constructor Summary

MDevices()

Method Summary

static int	close(MFile fh) closes a device
static void	finalinit() called to perform final initialisation (sets up /proc things)
static int	find_driver(java.lang.String name) finds a driver based on name (various uses)
static void	init_devices() called to initialise the device-driver management bits
static int	load_driver(java.lang.String name) "dynamically" loads a device driver
static int	open(MFile fh, int major, int minor, int flags) opens a device
static int	register_driver(java.lang.String name, int major, MFileOps drv) registers a device driver
static int	unregister_driver(java.lang.String name, int major) unregisters a device driver

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MDevices

public MDevices()

Method Detail

init_devices

public static void init_devices()

called to initialise the device-driver management bits

finalinit

public static void finalinit()

called to perform final initialisation (sets up /proc things)

find_driver

public static int find_driver(java.lang.String name)

finds a driver based on name (various uses)

Parameters:

name - device name

Returns:

major device number, or -1 if not found

register_driver

public static int register_driver(java.lang.String name,
                                  int major,
                                  MFileOps drv)

registers a device driver

Parameters:

name - device-driver name (must be unique)

major - major device number (must be unique)

drv - reference to device driver

Returns:

0 on success, or < 0 indicating error

unregister_driver

public static int unregister_driver(java.lang.String name,
                                    int major)

unregisters a device driver

Parameters:

name - device-driver name

major - major device number

Returns:

0 on success, or < 0 indicating error

load_driver

public static int load_driver(java.lang.String name)

"dynamically" loads a device driver

Parameters:

name - class name containing the device-driver

Returns:

0 on success, or < 0 indicating error

open

public static int open(MFile fh,
                       int major,
                       int minor,
                       int flags)

opens a device

Parameters:

fh - file-handle to be associated with the device (should have an inode attached)

major - major device number

minor - minor device number

flags - open flags

Returns:

0 on success, otherwise < 0 indicating error

close

public static int close(MFile fh)

closes a device

Parameters:

fh - file-handle associated with device

Returns:

0 on success, otherwise < 0 indicating error