NAME
zmq_msg_init_data - initialise 0MQ message from a supplied buffer
SYNOPSIS
typedef void (zmq_free_fn) (void *data, void *hint);
int zmq_msg_init_data (zmq_msg_t *msg, void *data, size_t size,
zmq_free_fn *ffn, void *hint);
DESCRIPTION
The zmq_msg_init_data() function shall initialise the message object
referenced by msg to represent the content referenced by the buffer
located at address data, size bytes long. No copy of data shall be
performed and 0MQ shall take ownership of the supplied buffer.
If provided, the deallocation function ffn shall be called once the
data buffer is no longer required by 0MQ, with the data and hint
arguments supplied to zmq_msg_init_data().
Caution
Never access zmq_msg_t members directly, instead always use the
zmq_msg family of functions.
RETURN VALUE
The zmq_msg_init_data() function shall return zero if successful.
Otherwise it shall return -1 and set errno to one of the values defined
below.
ERRORS
No errors are defined.
EXAMPLE
Example 1. Initialising a message from a supplied buffer
void my_free (void *data, void *hint)
{
free (data);
}
/* ... */
void *data = malloc (6);
assert (data);
memcpy (data, "ABCDEF", 6);
zmq_msg_t msg;
rc = zmq_msg_init_data (&msg, data, 6, my_free, NULL);
assert (rc == 0);
SEE ALSO
zmq_msg_init_size(3) zmq_msg_init(3) zmq_msg_close(3) zmq_msg_data(3)
zmq_msg_size(3) zmq(7)
AUTHORS
The 0MQ documentation was written by Martin Sustrik
<sustrik@250bpm.com[1]> and Martin Lucina <mato@kotelna.sk[2]>.
NOTES
1. sustrik@250bpm.com
mailto:sustrik@250bpm.com
2. mato@kotelna.sk
mailto:mato@kotelna.sk