mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-12-19 14:31:48 +01:00
70 lines
2.5 KiB
Groff
70 lines
2.5 KiB
Groff
.\" -*- nroff -*-
|
|
.\"
|
|
.\" Copyright (c) 1998 Doug Rabson
|
|
.\"
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" This program is free software.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
|
|
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd January 21, 2015
|
|
.Dt DEVICE_GET_SOFTC 9
|
|
.Os
|
|
.Sh NAME
|
|
.Nm device_get_softc
|
|
.Nd access driver private instance variables
|
|
.Sh SYNOPSIS
|
|
.In sys/param.h
|
|
.In sys/bus.h
|
|
.Ft void *
|
|
.Fn device_get_softc "device_t dev"
|
|
.Sh DESCRIPTION
|
|
Return the driver-specific software context of
|
|
.Fa 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
|
|
.Xr DEVICE_PROBE 9 .
|
|
The size of the allocation is determined by the device's
|
|
.Vt driver_t
|
|
information used to define the driver.
|
|
The softc typically encapsulates the state of this instance of the
|
|
device.
|
|
.Pp
|
|
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.
|
|
.Sh RETURN VALUES
|
|
The pointer to the driver-specific instance variable is returned.
|
|
.Sh SEE ALSO
|
|
.Xr device 9 ,
|
|
.Xr DEVICE_PROBE 9 ,
|
|
.Xr device_set_softc 9 ,
|
|
.Xr driver 9
|
|
.Sh AUTHORS
|
|
This manual page was written by
|
|
.An Doug Rabson .
|