zmq_msg_copy(3) - Linux man page
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.
- Caution
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 0MQ manual page was written by Martin Sustrik <sustrik@250bpm.com [1] > and Martin Lucina <mato@kotelna.sk [2] >.