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Special Forums News, Links, Events and Announcements Software Releases - RSS News 0MQ 0.3.1 (Default branch)
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Old 09-26-2008
0MQ 0.3.1 (Default branch)
0MQ is a lightweight messaging kernel. It achieves 30 microsecond end-to-end latencies and over 3 million messages per second. It can be used from C, C++, Python, and Java. License: GNU General Public License v3 Changes:
C, Python, and Java language bindings. The ability to use network interface names instead of IP addresses. Port numbers are not mandatory (the OS will assign them). zmq.hpp has been added as a main include file. There are manual pages and minor performance improvements. Image

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zmq_msg_copy

ZMQ_MSG_COPY(3) 						    0MQ Manual							   ZMQ_MSG_COPY(3)

NAME

       zmq_msg_copy - copy content of a message to another message

SYNOPSIS

       int zmq_msg_copy (zmq_msg_t *dest, zmq_msg_t *src);

DESCRIPTION

       The zmq_msg_copy() function shall copy the message object referenced by src to the message object referenced by dest. The original content
       of dest, if any, shall be released.

	   Caution
	   The implementation may choose not to physically copy the message content, rather to share the underlying buffer between src and dest.
	   Avoid modifying message content after a message has been copied with zmq_msg_copy(), doing so can result in undefined behaviour. If
	   what you need is an actual hard copy, allocate a new message using zmq_msg_init_size() and copy the message content using memcpy().

	   Caution
	   Never access zmq_msg_t members directly, instead always use the zmq_msg family of functions.

RETURN VALUE

       The zmq_msg_copy() function shall return zero if successful. Otherwise it shall return -1 and set errno to one of the values defined below.

ERRORS

       EFAULT
	   Invalid message.

SEE ALSO

       zmq_msg_move(3) zmq_msg_init(3) zmq_msg_init_size(3) zmq_msg_init_data(3) zmq_msg_close(3) zmq(7)

AUTHORS

       This manual page was written by the 0MQ community.

0MQ 2.2.0							    04/04/2012							   ZMQ_MSG_COPY(3)