1ZMQ_CLOSE(3)                      0MQ Manual                      ZMQ_CLOSE(3)
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NAME

6       zmq_close - close 0MQ socket
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SYNOPSIS

9       int zmq_close (void *socket);
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DESCRIPTION

12       The zmq_close() function shall destroy the socket referenced by the
13       socket argument. Any outstanding messages physically received from the
14       network but not yet received by the application with zmq_recv() shall
15       be discarded. The behaviour for discarding messages sent by the
16       application with zmq_send() but not yet physically transferred to the
17       network depends on the value of the ZMQ_LINGER socket option for the
18       specified socket.
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20       zmq_close() must be called exactly once for each socket. If it is never
21       called, zmq_ctx_term() will block forever. If it is called multiple
22       times for the same socket or if socket does not point to a socket, the
23       behaviour is undefined.
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25           Note
26           The default setting of ZMQ_LINGER does not discard unsent messages;
27           this behaviour may cause the application to block when calling
28           zmq_ctx_term(). For details refer to zmq_setsockopt(3) and
29           zmq_ctx_term(3).
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31           Note
32           This API will complete asynchronously, so not everything will be
33           deallocated after it returns. See above for details about linger.
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RETURN VALUE

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

40       ENOTSOCK
41           The provided socket was NULL.
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SEE ALSO

44       zmq_socket(3) zmq_ctx_term(3) zmq_setsockopt(3) zmq(7)
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AUTHORS

47       This page was written by the 0MQ community. To make a change please
48       read the 0MQ Contribution Policy at
49       http://www.zeromq.org/docs:contributing.
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530MQ 4.3.4                         01/21/2023                      ZMQ_CLOSE(3)
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