'\" t
.\"     Title: zmq_msg_init_size
.\"    Author: [see the "AUTHORS" section]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 10/23/2023
.\"    Manual: 0MQ Manual
.\"    Source: 0MQ 4.3.5
.\"  Language: English
.\"
.TH "ZMQ_MSG_INIT_SIZE" "3" "10/23/2023" "0MQ 4\&.3\&.5" "0MQ Manual"
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.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\&.
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.\}
.RS 4
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\fBCaution\fR
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Never access \fIzmq_msg_t\fR members directly, instead always use the \fIzmq_msg\fR family of functions\&.
.sp .5v
.RE
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.\}
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\fBCaution\fR
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The functions \fIzmq_msg_init()\fR, \fIzmq_msg_init_data()\fR, \fIzmq_msg_init_size()\fR and \fIzmq_msg_init_buffer()\fR are mutually exclusive\&. Never initialise 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_buffer\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[]\&.