nng_listener_id
return numeric listener identifier
- Provided by: libnng-dev (Version: 1.12.0-1)
- Source: nng
- Report a bug
SYNOPSIS
#include <nng/nng.h> int nng_listener_id(nng_listener l);
DESCRIPTION
The nng_listener_id() function returns a positive identifier for the listener l, if it is valid. Otherwise it returns -1.
Note
A listener is considered valid if it was ever created with the
nng_listener_create() or
nng_listen() functions. listeners that are allocated
on the stack or statically should be initialized with the macro
NNG_LISTENER_INITIALIZER to ensure that they cannot
be confused with a valid listener before they are created properly.
RETURN VALUES
This function returns the positive value for the listener identifier, or -1 if the listener is invalid.
ERRORS
None.