1 .\" Copyright (c) 1998 Doug Rabson
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27 .\" $FreeBSD: src/share/man/man9/device_get_state.9,v 1.3.2.5 2001/12/17 11:30:18 ru Exp $
30 .Dt DEVICE_GET_STATE 9
33 .Nm device_get_state ,
37 .Nd manipulate device state
42 .Fn device_get_state "device_t dev"
44 .Fn device_busy "device_t dev"
46 .Fn device_unbusy "device_t dev"
48 .Fn device_is_alive "device_t dev"
50 The current state of a device is accessed by calling
60 To test see if a device was successfully probed, call
62 which simply returns if the state is greater or equal to
65 Each device has a busy count which is incremented when
67 is called and decremented when
69 is called. Both routines return an error if the device state is less
75 is called on a device in the
77 state, the device changes to the
82 is called and after decrementing, the busy count for the device is
83 zero, the device changes to the
89 This man page was written by