'\" te
.\"  Copyright (c) 2006, Sun Microsystems, Inc.,  All Rights Reserved
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.TH QPROCSON 9F "Jan 16, 2006"
.SH NAME
qprocson, qprocsoff \- enable, disable put and service routines
.SH SYNOPSIS
.LP
.nf
#include <sys/stream.h>
#include <sys/ddi.h>

\fBvoid\fR \fBqprocson\fR(\fBqueue_t *\fR\fIq\fR);
.fi

.LP
.nf
\fBvoid\fR \fBqprocsoff\fR(\fBqueue_t *\fR\fIq\fR);
.fi

.SH INTERFACE LEVEL
.sp
.LP
Architecture independent level 1 (DDI/DKI).
.SH PARAMETERS
.sp
.ne 2
.na
\fB\fIq\fR\fR
.ad
.RS 5n
Pointer to the \fBRD\fR side of a streams queue pair.
.RE

.SH DESCRIPTION
.sp
.LP
The \fBqprocson()\fR enables the put and service routines of the driver or
module whose read queue is pointed to by \fIq\fR. Threads cannot enter the
module instance through the put and service routines while they are disabled.
.sp
.LP
The \fBqprocson()\fR function must be called by the open routine of a driver or
module before returning, and after any initialization necessary for the proper
functioning of the put and service routines.
.sp
.LP
The \fBqprocson()\fR function must be called before calling \fBput\fR(9F),
\fBputnext\fR(9F), \fBqbufcall\fR(9F), \fBqtimeout\fR(9F), \fBqwait\fR(9F), or
\fBqwait_sig\fR(9F).
.sp
.LP
The \fBqprocsoff()\fR function must be called by the close routine of a driver
or module before returning, and before deallocating any resources necessary for
the proper functioning of the put and service routines. It also removes the
queue's service routines from the service queue, and blocks until any pending
service processing completes.
.sp
.LP
The module or driver instance is guaranteed to be single-threaded before
\fBqprocson()\fR is called and after \fBqprocsoff()\fR is called, except for
threads executing asynchronous events such as interrupt handlers and callbacks,
which must be handled separately.
.SH CONTEXT
.sp
.LP
These routines can be called from user, interrupt, or kernel context.
.SH SEE ALSO
.sp
.LP
\fBclose\fR(9E), \fBopen\fR(9E), \fBput\fR(9E), \fBsrv\fR(9E), \fBput\fR(9F),
\fBputnext\fR(9F), \fBqbufcall\fR(9F), \fBqtimeout\fR(9F), \fBqwait\fR(9F),
\fBqwait_sig\fR(9F)
.sp
.LP
\fIWriting Device Drivers\fR
.sp
.LP
\fISTREAMS Programming Guide\fR
.SH NOTES
.sp
.LP
The caller may not have the stream frozen during either of these calls.