'\" t
.\"     Title: xs_msg_init_size
.\"    Author: [see the "AUTHORS" section]
.\" Generator: DocBook XSL Stylesheets v1.75.2 <http://docbook.sf.net/>
.\"      Date: 06/13/2012
.\"    Manual: Crossroads I/O Manual
.\"    Source: Crossroads I/O 1.2.0
.\"  Language: English
.\"
.TH "XS_MSG_INIT_SIZE" "3" "06/13/2012" "Crossroads I/O 1\&.2\&.0" "Crossroads I/O Manual"
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.SH "NAME"
xs_msg_init_size \- initialise Crossroads message of a specified size
.SH "SYNOPSIS"
.sp
\fBint xs_msg_init_size (xs_msg_t \fR\fB\fI*msg\fR\fR\fB, size_t \fR\fB\fIsize\fR\fR\fB);\fR
.SH "DESCRIPTION"
.sp
The \fIxs_msg_init_size()\fR function shall allocate any resources required to store a message \fIsize\fR bytes long and initialise the message object referenced by \fImsg\fR to represent the newly allocated message\&.
.sp
The implementation shall choose whether to store message content on the stack (small messages) or on the heap (large messages)\&. For performance reasons \fIxs_msg_init_size()\fR shall not clear the message data\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
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\fBCaution\fR
.ps -1
.br
.sp
Never access \fIxs_msg_t\fR members directly, instead always use the \fIxs_msg\fR family of functions\&.
.sp .5v
.RE
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
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\fBCaution\fR
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The functions \fIxs_msg_init()\fR, \fIxs_msg_init_data()\fR and \fIxs_msg_init_size()\fR are mutually exclusive\&. Never initialize the same \fIxs_msg_t\fR twice\&.
.sp .5v
.RE
.SH "RETURN VALUE"
.sp
The \fIxs_msg_init_size()\fR function shall return zero if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&.
.SH "ERRORS"
.PP
\fBENOMEM\fR
.RS 4
Insufficient storage space is available\&.
.RE
.SH "SEE ALSO"
.sp
\fBxs_msg_init_data\fR(3) \fBxs_msg_init\fR(3) \fBxs_msg_close\fR(3) \fBxs_msg_data\fR(3) \fBxs_msg_size\fR(3) \fBxs\fR(7)
.SH "AUTHORS"
.sp
The Crossroads documentation was written by Martin Sustrik <\m[blue]\fBsustrik@250bpm\&.com\fR\m[]\&\s-2\u[1]\d\s+2> and Martin Lucina <\m[blue]\fBmartin@lucina\&.net\fR\m[]\&\s-2\u[2]\d\s+2>\&.
.SH "NOTES"
.IP " 1." 4
sustrik@250bpm.com
.RS 4
\%mailto:sustrik@250bpm.com
.RE
.IP " 2." 4
martin@lucina.net
.RS 4
\%mailto:martin@lucina.net
.RE