nn_errno(3) =========== NAME ---- nn_errno - retrieve the current errno SYNOPSIS -------- *#include * *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 -------- linknanomsg:nn_strerror[3] linknanomsg:nanomsg[7] AUTHORS ------- Martin Sustrik