You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
100 lines
2.8 KiB
100 lines
2.8 KiB
5 years ago
|
'\" t
|
||
|
|
.\" Title: zmq_msg_init
|
||
|
|
.\" Author: [see the "AUTHORS" section]
|
||
|
|
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
|
||
|
|
.\" Date: 09/14/2016
|
||
|
|
.\" Manual: 0MQ Manual
|
||
|
|
.\" Source: 0MQ 4.1.5
|
||
|
|
.\" Language: English
|
||
|
|
.\"
|
||
|
|
.TH "ZMQ_MSG_INIT" "3" "09/14/2016" "0MQ 4\&.1\&.5" "0MQ Manual"
|
||
|
|
.\" -----------------------------------------------------------------
|
||
|
|
.\" * Define some portability stuff
|
||
|
|
.\" -----------------------------------------------------------------
|
||
|
|
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||
|
|
.\" http://bugs.debian.org/507673
|
||
|
|
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
|
||
|
|
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||
|
|
.ie \n(.g .ds Aq \(aq
|
||
|
|
.el .ds Aq '
|
||
|
|
.\" -----------------------------------------------------------------
|
||
|
|
.\" * set default formatting
|
||
|
|
.\" -----------------------------------------------------------------
|
||
|
|
.\" disable hyphenation
|
||
|
|
.nh
|
||
|
|
.\" disable justification (adjust text to left margin only)
|
||
|
|
.ad l
|
||
|
|
.\" -----------------------------------------------------------------
|
||
|
|
.\" * MAIN CONTENT STARTS HERE *
|
||
|
|
.\" -----------------------------------------------------------------
|
||
|
|
.SH "NAME"
|
||
|
|
zmq_msg_init \- initialise empty 0MQ message
|
||
|
|
.SH "SYNOPSIS"
|
||
|
|
.sp
|
||
|
|
\fBint zmq_msg_init (zmq_msg_t \fR\fB\fI*msg\fR\fR\fB);\fR
|
||
|
|
.SH "DESCRIPTION"
|
||
|
|
.sp
|
||
|
|
The \fIzmq_msg_init()\fR function shall initialise the message object referenced by \fImsg\fR to represent an empty message\&. This function is most useful when called before receiving a message with \fIzmq_recv()\fR\&.
|
||
|
|
.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()\fR function always returns zero\&.
|
||
|
|
.SH "ERRORS"
|
||
|
|
.sp
|
||
|
|
No errors are defined\&.
|
||
|
|
.SH "EXAMPLE"
|
||
|
|
.PP
|
||
|
|
\fBReceiving a message from a socket\fR.
|
||
|
|
.sp
|
||
|
|
.if n \{\
|
||
|
|
.RS 4
|
||
|
|
.\}
|
||
|
|
.nf
|
||
|
|
zmq_msg_t msg;
|
||
|
|
rc = zmq_msg_init (&msg);
|
||
|
|
assert (rc == 0);
|
||
|
|
int nbytes = zmq_recv (socket, &msg, 0);
|
||
|
|
assert (nbytes != \-1);
|
||
|
|
.fi
|
||
|
|
.if n \{\
|
||
|
|
.RE
|
||
|
|
.\}
|
||
|
|
.sp
|
||
|
|
.SH "SEE ALSO"
|
||
|
|
.sp
|
||
|
|
\fBzmq_msg_init_size\fR(3) \fBzmq_msg_init_data\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[]\&.
|