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XS_MSG_INIT(3) Crossroads I/O Manual XS_MSG_INIT(3)

NAME

xs_msg_init - initialise empty Crossroads message

SYNOPSIS

int xs_msg_init (xs_msg_t *msg);

DESCRIPTION

The xs_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 xs_recv().


Caution

Never access xs_msg_t members directly, instead always use the xs_msg family of functions.


Caution

The functions xs_msg_init(), xs_msg_init_data() and xs_msg_init_size() are mutually exclusive. Never initialize the same xs_msg_t twice.

RETURN VALUE

The xs_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. 

xs_msg_t msg;
rc = xs_msg_init (&msg);
assert (rc == 0);
rc = xs_recv (socket, &msg, 0);
assert (rc == 0);

SEE ALSO

xs_msg_init_size(3) xs_msg_init_data(3) xs_msg_close(3) xs_msg_data(3) xs_msg_size(3) xs(7)

AUTHORS

The Crossroads documentation was written by Martin Sustrik <sustrik@250bpm.com[1]> and Martin Lucina <martin@lucina.net[2]>.

NOTES

1.
sustrik@250bpm.com
mailto:sustrik@250bpm.com
2.
martin@lucina.net
mailto:martin@lucina.net
06/13/2012 Crossroads I/O 1.2.0