NAME

       zmq_close - close 0MQ socket

SYNOPSIS

       int zmq_close (void *socket);

DESCRIPTION

       The zmq_close() function shall destroy the socket referenced by the socket argument. Any outstanding
       messages physically received from the network but not yet received by the application with zmq_recv()
       shall be discarded. The behaviour for discarding messages sent by the application with zmq_send() but not
       yet physically transferred to the network depends on the value of the ZMQ_LINGER socket option for the
       specified socket.

       zmq_close() must be called exactly once for each socket. If it is never called, zmq_ctx_term() will block
       forever. If it is called multiple times for the same socket or if socket does not point to a socket, the
       behaviour is undefined.

           Note

           The default setting of ZMQ_LINGER does not discard unsent messages; this behaviour may cause the
           application to block when calling zmq_ctx_term(). For details refer to zmq_setsockopt(3) and
           zmq_ctx_term(3).

           Note

           This API will complete asynchronously, so not everything will be deallocated after it returns. See
           above for details about linger.

RETURN VALUE

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

ERRORS

       ENOTSOCK
           The provided socket was NULL.

SEE ALSO

       zmq_socket(3) zmq_ctx_term(3) zmq_setsockopt(3) 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.

0MQ 4.3.4                                          12/16/2021                                       ZMQ_CLOSE(3)