1.Any blocking operations currently in progress on sockets open within context shall return immediately with an error code of ETERM. With the exception of zmq_close(), any further operations on sockets open within context shall fail with an error code of ETERM.
2.After interrupting all blocking calls, zmq_ctx_term() shall block until the following conditions are satisfied:For further details regarding socket linger behaviour refer to the ZMQ_LINGER option in zmq_setsockopt(3). This function replaces the deprecated functions zmq_term(3) and zmq_ctx_destroy(3).
•All sockets open within context have been closed with zmq_close().
•For each socket within context, all messages sent by the application with zmq_send() have either been physically transferred to a network peer, or the socket’s linger period set with the ZMQ_LINGER socket option has expired.
The provided context was invalid.EINTR
Termination was interrupted by a signal. It can be restarted if needed.