te
Copyright 1989 AT&T
Copyright (c) 2006, Sun Microsystems, Inc. All Rights Reserved
The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
Copyright 1989 AT&T
Copyright (c) 2006, Sun Microsystems, Inc. All Rights Reserved
The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
RD 9F "16 Jan 2006" "SunOS 5.11" "Kernel Functions for Drivers"
NAME
RD, rd - get pointer to the read queue
SYNOPSIS
#include <sys/stream.h> #include <sys/ddi.h> queue_t *RD(queue_t *q);
INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI).
PARAMETERS
q
Pointer to the write queue whose read queue is to be returned.
DESCRIPTION
The RD() function accepts a write queue pointer as an argument and returns a pointer to the read queue of the same module.
CAUTION: Make sure the argument to this function is a pointer to a write queue. RD() will not check for queue type, and a system panic could result if it is not the right type.
RETURN VALUES
The pointer to the read queue.
CONTEXT
The RD() function can be called from user, interrupt, or kernel context.
EXAMPLES
Example 1 Function page reference
See the qreply(9F) function page for an example of RD().
SEE ALSO
qreply(9F), WR(9F)
Writing Device Drivers
STREAMS Programming Guide