3 .\" Copyright (c) 1998 Doug Rabson
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32 .Dt DEVICE_GET_STATE 9
35 .Nm device_get_state ,
39 .Nm device_is_attached
40 .Nd manipulate device state
45 .Fn device_get_state "device_t dev"
47 .Fn device_busy "device_t dev"
49 .Fn device_unbusy "device_t dev"
51 .Fn device_is_alive "device_t dev"
53 .Fn device_is_attached "device_t dev"
55 The current state of a device is accessed by calling
65 To test see if a device was successfully probed, call
67 which simply returns if the state is greater or equal to
69 To test see if a device was successfully attached, call
70 .Fn device_is_attached
71 which simply returns if the state is greater or equal to
74 Each device has a busy count which is incremented when
76 is called and decremented when
79 Both routines return an error if the device state is less than
84 is called on a device in the
86 state, the device changes to the
91 is called and after decrementing, the busy count for the device is
92 zero, the device changes to the
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