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 software context 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.

Debian                                          January 21, 2015                             DEVICE_GET_SOFTC(9)