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* Problem: boilerplate when init msg from data copy Solution: Add zmq_msg_init_buffer to construct a message by copying memory from buffer.
66 lines
1.3 KiB
Plaintext
66 lines
1.3 KiB
Plaintext
zmq_msg_init(3)
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===============
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NAME
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----
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zmq_msg_init - initialise empty 0MQ message
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SYNOPSIS
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--------
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*int zmq_msg_init (zmq_msg_t '*msg');*
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DESCRIPTION
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-----------
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The _zmq_msg_init()_ function shall initialise the message object referenced by
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'msg' to represent an empty message. This function is most useful when called
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before receiving a message with _zmq_msg_recv()_.
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CAUTION: Never access 'zmq_msg_t' members directly, instead always use the
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_zmq_msg_ family of functions.
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CAUTION: The functions _zmq_msg_init()_, _zmq_msg_init_data()_,
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_zmq_msg_init_size()_ and _zmq_msg_init_buffer()_ are mutually exclusive.
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Never initialise the same 'zmq_msg_t' twice.
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RETURN VALUE
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------------
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The _zmq_msg_init()_ function always returns zero.
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ERRORS
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------
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No errors are defined.
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EXAMPLE
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-------
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.Receiving a message from a socket
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----
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zmq_msg_t msg;
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rc = zmq_msg_init (&msg);
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assert (rc == 0);
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int nbytes = zmq_msg_recv (socket, &msg, 0);
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assert (nbytes != -1);
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----
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SEE ALSO
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--------
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linkzmq:zmq_msg_init_size[3]
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linkzmq:zmq_msg_init_buffer[3]
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linkzmq:zmq_msg_init_data[3]
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linkzmq:zmq_msg_close[3]
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linkzmq:zmq_msg_data[3]
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linkzmq:zmq_msg_size[3]
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linkzmq:zmq[7]
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AUTHORS
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-------
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This page was written by the 0MQ community. To make a change please
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read the 0MQ Contribution Policy at <http://www.zeromq.org/docs:contributing>.
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