zmq_msg_init(3) =============== NAME ---- zmq_msg_init - initialise empty 0MQ message SYNOPSIS -------- *int zmq_msg_init (zmq_msg_t '*msg');* DESCRIPTION ----------- The _zmq_msg_init()_ function shall initialise the message object referenced by 'msg' to represent an empty message. This function is most useful when called before receiving a message with _zmq_recv()_. CAUTION: Never access 'zmq_msg_t' members directly, instead always use the _zmq_msg_ family of functions. CAUTION: The functions _zmq_msg_init()_, _zmq_msg_init_data()_ and _zmq_msg_init_size()_ are mutually exclusive. Never initialize the same 'zmq_msg_t' twice. RETURN VALUE ------------ The _zmq_msg_init()_ 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 ------- .Receiving a message from a socket ---- zmq_msg_t msg; rc = zmq_msg_init (&msg); assert (rc == 0); int nbytes = zmq_recv (socket, &msg, 0); assert (nbytes != -1); ---- SEE ALSO -------- linkzmq:zmq_msg_init_size[3] linkzmq:zmq_msg_init_data[3] linkzmq:zmq_msg_close[3] linkzmq:zmq_msg_data[3] linkzmq:zmq_msg_size[3] linkzmq:zmq[7] AUTHORS ------- This page was written by the 0MQ community. To make a change please read the 0MQ Contribution Policy at .