zmq_msg_init_buffer - initialise 0MQ message with buffer copy

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0MQ 4.3.5                                          03/31/2024                             ZMQ_MSG_INIT_BUFFER(3)

       The zmq_msg_init_buffer() function shall allocate any resources required to store a message size bytes
       long and initialise the message object referenced by msg to represent a copy of the buffer referenced by
       the buf and size arguments.

       The implementation shall choose whether to store message content on the stack (small messages) or on the
       heap (large messages).

           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(), zmq_msg_init_buffer() and zmq_msg_init_buffer()
           are mutually exclusive. Never initialise the same zmq_msg_t twice.

ENOMEM
           Insufficient storage space is available.

       zmq_msg_init_buffer - initialise 0MQ message with buffer copy

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

zmq_msg_init_data(3) zmq_msg_init_size(3) zmq_msg_init(3) zmq_msg_close(3) zmq_msg_data(3)
       zmq_msg_size(3) zmq(7)

intzmq_msg_init_buffer(zmq_msg_t*msg,constvoid*buf,size_tsize);