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
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0MQ 4.3.4 01/18/2023 ZMQ_CLOSE(3)
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