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zmq_init(3)
===========


NAME
----
zmq_init - initialise 0MQ context


SYNOPSIS
--------
*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 handle
I/O operations. If your application is using only the 'inproc' transport for
messaging you may set this to zero, otherwise set it to at least one.

.Thread safety
A 0MQ 'context' is thread safe and may be shared among as many application
threads as necessary, without any additional locking required on the part of
the 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 one
of the values defined below.


ERRORS
------
*EINVAL*::
An invalid number of 'io_threads' was requested.


SEE ALSO
--------
linkzmq:zmq[7]
linkzmq:zmq_term[3]


AUTHORS
-------
The 0MQ documentation was written by Martin Sustrik <sustrik@250bpm.com> and
Martin Lucina <martin@lucina.net>.
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