= zmq_errno(3)


== NAME
zmq_errno - retrieve value of errno for the calling thread


== SYNOPSIS
*int zmq_errno (void);*


== DESCRIPTION
The _zmq_errno()_ function shall retrieve the value of the 'errno' variable for
the calling thread.

The _zmq_errno()_ function is provided to assist users on non-POSIX systems who
are experiencing issues with retrieving the correct value of 'errno' directly.
Specifically, users on Win32 systems whose application is using a different C
run-time library from the C run-time library in use by 0MQ will need to use
_zmq_errno()_ for correct operation.

IMPORTANT: Users not experiencing issues with retrieving the correct value of
'errno' should not use this function and should instead access the 'errno'
variable directly.


== RETURN VALUE
The _zmq_errno()_ function shall return the value of the 'errno' variable for
the calling thread.


== ERRORS
No errors are defined.


== SEE ALSO
* xref:zmq.adoc[zmq]


== AUTHORS
This page was written by the 0MQ community. To make a change please
read the 0MQ Contribution Policy at <https://zeromq.org/how-to-contribute/>.