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'\" t
.\" Title: zmq_msg_init_size
.\" Author: [see the "AUTHORS" section]
.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/>
.\" Date: 10/14/2014
.\" Manual: 0MQ Manual
.\" Source: 0MQ 4.0.5
.\" Language: English
.\"
.TH "ZMQ_MSG_INIT_SIZE" "3" "10/14/2014" "0MQ 4\&.0\&.5" "0MQ Manual"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
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.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.nh
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.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
zmq_msg_init_size \- initialise 0MQ message of a specified size
.SH "SYNOPSIS"
.sp
\fBint zmq_msg_init_size (zmq_msg_t \fR\fB\fI*msg\fR\fR\fB, size_t \fR\fB\fIsize\fR\fR\fB);\fR
.SH "DESCRIPTION"
.sp
The \fIzmq_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 \fIzmq_msg_init_size()\fR shall not clear the message data\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBCaution\fR
.ps -1
.br
.sp
Never access \fIzmq_msg_t\fR members directly, instead always use the \fIzmq_msg\fR family of functions\&.
.sp .5v
.RE
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBCaution\fR
.ps -1
.br
.sp
The functions \fIzmq_msg_init()\fR, \fIzmq_msg_init_data()\fR and \fIzmq_msg_init_size()\fR are mutually exclusive\&. Never initialize the same \fIzmq_msg_t\fR twice\&.
.sp .5v
.RE
.SH "RETURN VALUE"
.sp
The \fIzmq_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
\fBzmq_msg_init_data\fR(3) \fBzmq_msg_init\fR(3) \fBzmq_msg_close\fR(3) \fBzmq_msg_data\fR(3) \fBzmq_msg_size\fR(3) \fBzmq\fR(7)
.SH "AUTHORS"
.sp
This page was written by the 0MQ community\&. To make a change please read the 0MQ Contribution Policy at \m[blue]\fBhttp://www\&.zeromq\&.org/docs:contributing\fR\m[]\&.
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