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Diffstat (limited to 'doc/zmq_msg_send.txt')
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diff --git a/doc/zmq_msg_send.txt b/doc/zmq_msg_send.txt deleted file mode 100644 index 1056e60..0000000 --- a/doc/zmq_msg_send.txt +++ /dev/null @@ -1,125 +0,0 @@ -zmq_msg_send(3) -=============== - - -NAME ----- -zmq_msg_send - send a message part on a socket - - -SYNOPSIS --------- -*int zmq_msg_send (zmq_msg_t '*msg', void '*socket', int 'flags');* - - -DESCRIPTION ------------ -The _zmq_msg_send()_ function is identical to linkzmq:zmq_sendmsg[3], which -shall be deprecated in future versions. _zmq_msg_send()_ is more consistent -with other message manipulation functions. - -The _zmq_msg_send()_ function shall queue the message referenced by the 'msg' -argument to be sent to the socket referenced by the 'socket' argument. The -'flags' argument is a combination of the flags defined below: - -*ZMQ_DONTWAIT*:: -For socket types (DEALER, PUSH) that block when there are no available peers -(or all peers have full high-water mark), specifies that the operation should -be performed in non-blocking mode. If the message cannot be queued on the -'socket', the _zmq_msg_send()_ function shall fail with 'errno' set to EAGAIN. - -*ZMQ_SNDMORE*:: -Specifies that the message being sent is a multi-part message, and that further -message parts are to follow. Refer to the section regarding multi-part messages -below for a detailed description. - -The _zmq_msg_t_ structure passed to _zmq_msg_send()_ is nullified during the -call. If you want to send the same message to multiple sockets you have to copy -it using (e.g. using _zmq_msg_copy()_). - -NOTE: A successful invocation of _zmq_msg_send()_ does not indicate that the -message has been transmitted to the network, only that it has been queued on -the 'socket' and 0MQ has assumed responsibility for the message. You do not need -to call _zmq_msg_close()_ after a successful _zmq_msg_send()_. - - -Multi-part messages -~~~~~~~~~~~~~~~~~~~ -A 0MQ message is composed of 1 or more message parts. Each message -part is an independent 'zmq_msg_t' in its own right. 0MQ ensures atomic -delivery of messages: peers shall receive either all _message parts_ of a -message or none at all. The total number of message parts is unlimited except -by available memory. - -An application that sends multi-part messages must use the _ZMQ_SNDMORE_ flag -when sending each message part except the final one. - -RETURN VALUE ------------- -The _zmq_msg_send()_ function shall return number of bytes in the message -if successful. Otherwise it shall return `-1` and set 'errno' to one of the -values defined below. - - -ERRORS ------- -*EAGAIN*:: -Non-blocking mode was requested and the message cannot be sent at the moment. -*ENOTSUP*:: -The _zmq_msg_send()_ operation is not supported by this socket type. -*EFSM*:: -The _zmq_msg_send()_ operation cannot be performed on this socket at the moment -due to the socket not being in the appropriate state. This error may occur with -socket types that switch between several states, such as ZMQ_REP. See the -_messaging patterns_ section of linkzmq:zmq_socket[3] for more information. -*ETERM*:: -The 0MQ 'context' associated with the specified 'socket' was terminated. -*ENOTSOCK*:: -The provided 'socket' was invalid. -*EINTR*:: -The operation was interrupted by delivery of a signal before the message was -sent. -*EFAULT*:: -Invalid message. -*EHOSTUNREACH*:: -The message cannot be routed. - - -EXAMPLE -------- -.Filling in a message and sending it to a socket ----- -/* Create a new message, allocating 6 bytes for message content */ -zmq_msg_t msg; -int rc = zmq_msg_init_size (&msg, 6); -assert (rc == 0); -/* Fill in message content with 'AAAAAA' */ -memset (zmq_msg_data (&msg), 'A', 6); -/* Send the message to the socket */ -rc = zmq_msg_send (&msg, socket, 0); -assert (rc == 6); ----- - -.Sending a multi-part message ----- -/* Send a multi-part message consisting of three parts to socket */ -rc = zmq_msg_send (&part1, socket, ZMQ_SNDMORE); -rc = zmq_msg_send (&part2, socket, ZMQ_SNDMORE); -/* Final part; no more parts to follow */ -rc = zmq_msg_send (&part3, socket, 0); ----- - - -SEE ALSO --------- -linkzmq:zmq_recv[3] -linkzmq:zmq_send[3] -linkzmq:zmq_msg_recv[3] -linkzmq:zmq_socket[7] -linkzmq:zmq[7] - - -AUTHORS -------- -This page was written by the 0MQ community. To make a change please -read the 0MQ Contribution Policy at <http://www.zeromq.org/docs:contributing>. |