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- 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 the CRT library, they don't share
- the 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 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#,nn_strerror(3)>>
- <<nanomsg#,nanomsg(7)>>
- AUTHORS
- -------
- link:mailto:sustrik@250bpm.com[Martin Sustrik]
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