blob: e246337feaca5e65649b8c4070dc304ac16b3185 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
'\" t
.\" Title: zmq_msg_copy
.\" Author: [see the "AUTHORS" section]
.\" Generator: DocBook XSL Stylesheets v1.75.2 <http://docbook.sf.net/>
.\" Date: 04/04/2012
.\" Manual: 0MQ Manual
.\" Source: 0MQ 2.2.0
.\" Language: English
.\"
.TH "ZMQ_MSG_COPY" "3" "04/04/2012" "0MQ 2\&.2\&.0" "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_copy \- copy content of a message to another message
.SH "SYNOPSIS"
.sp
\fBint zmq_msg_copy (zmq_msg_t \fR\fB\fI*dest\fR\fR\fB, zmq_msg_t \fR\fB\fI*src\fR\fR\fB);\fR
.SH "DESCRIPTION"
.sp
The \fIzmq_msg_copy()\fR function shall copy the message object referenced by \fIsrc\fR to the message object referenced by \fIdest\fR\&. The original content of \fIdest\fR, if any, shall be released\&.
.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 implementation may choose not to physically copy the message content, rather to share the underlying buffer between \fIsrc\fR and \fIdest\fR\&. Avoid modifying message content after a message has been copied with \fIzmq_msg_copy()\fR, doing so can result in undefined behaviour\&. If what you need is an actual hard copy, allocate a new message using \fIzmq_msg_init_size()\fR and copy the message content using \fImemcpy()\fR\&.
.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
Never access \fIzmq_msg_t\fR members directly, instead always use the \fIzmq_msg\fR family of functions\&.
.sp .5v
.RE
.SH "RETURN VALUE"
.sp
The \fIzmq_msg_copy()\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
\fBEFAULT\fR
.RS 4
Invalid message\&.
.RE
.SH "SEE ALSO"
.sp
\fBzmq_msg_move\fR(3) \fBzmq_msg_init\fR(3) \fBzmq_msg_init_size\fR(3) \fBzmq_msg_init_data\fR(3) \fBzmq_msg_close\fR(3) \fBzmq\fR(7)
.SH "AUTHORS"
.sp
This manual page was written by the 0MQ community\&.
|
