From e90ada0d044636201c57786307a49a52f9cf7643 Mon Sep 17 00:00:00 2001 From: Martin Sustrik Date: Sun, 22 Nov 2009 16:51:21 +0100 Subject: more man pages filled in --- man/man3/zmq_recv.3 | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) (limited to 'man/man3/zmq_recv.3') diff --git a/man/man3/zmq_recv.3 b/man/man3/zmq_recv.3 index 8308f79..d3cf2fd 100644 --- a/man/man3/zmq_recv.3 +++ b/man/man3/zmq_recv.3 @@ -4,9 +4,49 @@ zmq_recv \- retrieves a message from the socket .SH SYNOPSIS .B int zmq_recv (void *s, zmq_msg_t *msg, int flags); .SH DESCRIPTION +Receive a message from the socket +.IR s , +store it in +.IR msg . +Any content previously in +.IR msg +will be properly deallocated. +.IR flags +argument can be combination of the flags described below. + +.IP "\fBZMQ_NOBLOCK\fP" +The flag specifies that the operation should be performed in +non-blocking mode. I.e. if it cannot be processed immediately, +error should be returned with +.IR errno +set to EAGAIN. + .SH RETURN VALUE +In case of success the function returns zero. Otherwise it returns -1 and +sets +.IR errno +to the appropriate value. .SH ERRORS +.IP "\fBEAGAIN\fP" +it's a non-blocking receive and there's no message available at the moment. +.IP "\fBENOTSUP\fP" +function isn't supported by particular socket type. +.IP "\fBEFSM\fP" +function cannot be called at the moment, because socket is not in the +approprite state. This error may occur with sockets that switch between +several states (e.g. ZMQ_REQ). .SH EXAMPLE +.nf +zmq_msg_t msg; +int rc = zmq_msg_init (&msg); +assert (rc == 0); +rc = zmq_recv (s, &msg, 0); +assert (rc == 0); +.fi .SH SEE ALSO +.BR zmq_send (3) +.BR zmq_msg_init (3) +.BR zmq_msg_data (3) +.BR zmq_msg_size (3) .SH AUTHOR Martin Sustrik -- cgit v1.2.3