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This documentation is for version v1.1.0 of nng, but the latest released version is v1.6.0. see the documentation for v1.6.0 for the most up-to-date information.


#include <nng/nng.h>

int nng_listener_id(nng_listener l);


The nng_listener_id() function returns a positive identifier for the listener l, if it is valid. Otherwise it returns -1.

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.


This function returns the positive value for the listener identifier, or -1 if the listener is invalid.



NNG Reference Manual vv1.1.0 © 2019 Staysail Systems, Inc, © 2018 Capitar IT Group BV
This document is supplied under the MIT License.
nanomsg™ and nng™ are trademarks of Garrett D'Amore.