nanomsg
Home Download Documentation Development Community Support
NOTE: This documentation is for version 0.1-alpha of nanomsg, but the latest released version is 1.1.2. Please see the documentation for 1.1.2 for the most up-to-date information.
nn_errno(3)

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

AUTHORS

Martin Sustrik <sustrik@250bpm.com>


"nanomsg" is a trademark of Garrett D'Amore.