'\" t
.\"     Title: relay_switch_subbuf
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: May 2018
.\"    Manual: relay interface support
.\"    Source: Kernel Hackers Manual 3.16.56
.\"  Language: English
.\"
.TH "RELAY_SWITCH_SUBBUF" "9" "May 2018" "Kernel Hackers Manual 3\&.16\&" "relay interface support"
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.SH "NAME"
relay_switch_subbuf \- switch to a new sub\-buffer
.SH "SYNOPSIS"
.HP \w'size_t\ relay_switch_subbuf('u
.BI "size_t relay_switch_subbuf(struct\ rchan_buf\ *\ " "buf" ", size_t\ " "length" ");"
.SH "ARGUMENTS"
.PP
\fIbuf\fR
.RS 4
channel buffer
.RE
.PP
\fIlength\fR
.RS 4
size of current event
.RE
.SH "DESCRIPTION"
.PP
Returns either the length passed in or 0 if full\&.
.PP
Performs sub\-buffer\-switch tasks such as invoking callbacks, updating padding counts, waking up readers, etc\&.
.SH "COPYRIGHT"
.br