DragonFly On-Line Manual Pages

NN_ERRNO(3)                     nanomsg manual                     NN_ERRNO(3)

NAME
       nn_errno - retrieve the current errno

SYNOPSIS
       #include <nanomsg/nn.h>

       int nn_errno (void);

DESCRIPTION
       Returns value of errno for the current thread.

       On most systems, errno can be accessed directly and this function is
       not needed. However, on Windows, there are multiple implementations of
       the CRT library (single-threaded, multi-threaded, release, debug) and
       each of them has its own instance of errno. Thus, if nanomsg library
       and the application that uses it link with different versions of CRT
       library, they don't share same instance of errno. Consequently, error
       codes set by nanomsg cannot be accessed by the application. To overcome
       this problem, application can use nn_errno() function to retrieve the
       nanomsg's value of errno.

RETURN VALUE
       Returns value of errno for the current thread.

ERRORS
       No errors are defined.

EXAMPLE
           rc = nn_send (s, "ABC", 3, 0);
           if (rc < 0)
               printf ("nn_send failed with error code %d\n", nn_errno ());

SEE ALSO
       nn_strerror(3) nanomsg(7)

AUTHORS
       Martin Sustrik <sustrik@250bpm.com[1]>

NOTES
        1. sustrik@250bpm.com
           mailto:sustrik@250bpm.com

nanomsg Unknown                   12/23/2015                       NN_ERRNO(3)