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zmq_init(3)===========NAME----zmq_init - initialise 0MQ contextSYNOPSIS--------*void *zmq_init (int 'io_threads');*DESCRIPTION-----------The _zmq_init()_ function initialises a 0MQ 'context'.The 'io_threads' argument specifies the size of the 0MQ thread pool to handleI/O operations. If your application is using only the 'inproc' transport formessaging you may set this to zero, otherwise set it to at least one..Thread safetyA 0MQ 'context' is thread safe and may be shared among as many applicationthreads as necessary, without any additional locking required on the part ofthe caller.RETURN VALUE------------The _zmq_init()_ function shall return an opaque handle to the initialised'context' if successful. Otherwise it shall return NULL and set 'errno' to oneof the values defined below.ERRORS------*EINVAL*::An invalid number of 'io_threads' was requested.SEE ALSO--------linkzmq:zmqlinkzmq:zmq_termAUTHORS-------The 0MQ documentation was written by Martin Sustrik <firstname.lastname@example.org> andMartin Lucina <email@example.com>.