ZMQ_CLOSE(3)                      0MQ Manual                      ZMQ_CLOSE(3)

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 4.3.5                         10/23/2023                      ZMQ_CLOSE(3)