device_get_softc man page on FreeBSD

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DEVICE_GET_SOFTC(9)	 BSD Kernel Developer's Manual	   DEVICE_GET_SOFTC(9)

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 ini‐
     tialized and present when a device is probed, but is subject to caveats
     as described in DEVICE_PROBE(9).  The size of the allocation is deter‐
     mined 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.

BSD				August 2, 2005				   BSD
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