NAME¶
device_get_softc
—
access driver private instance variables
SYNOPSIS¶
#include
<sys/param.h>
#include
<sys/bus.h>
void *
device_get_softc
(
device_t
dev);
DESCRIPTION¶
Return the driver-specific state of
dev. The
softc is automatically allocated and zeroed when the device is attached. The
softc is also initialized and present when a device is probed, but is subject
to caveats as described in
DEVICE_PROBE(9). The
size of the allocation is determined by the device's
driver_t information used to define the
driver. The softc typically encapsulates the state of this instance of the
device.
Driver writers are discouraged from using their own softc management mechanisms.
Driver writers should not copy such mechanisms found in drivers in the tree
that predate this function.
RETURN VALUES¶
The pointer to the driver-specific instance variable is returned.
SEE ALSO¶
device(9),
DEVICE_PROBE(9),
device_set_softc(9),
driver(9)
AUTHORS¶
This manual page was written by
Doug
Rabson.