nng_pipe_id - return numeric pipe identifier

       The nng_pipe_id() function returns a positive identifier for the pipe p, if it is valid. Otherwise it
       returns -1.

           Note

           A pipe is considered valid if it was ever created by the socket. Pipes that are allocated on the
           stack or statically should be initialized with the macro NNG_PIPE_INITIALIZER to ensure that they
           cannot be confused with a valid pipe.

       None.

       nng_pipe_id - return numeric pipe identifier

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

nng_pipe(5), nng(7)

                                                   2025-04-20                                     NNG_PIPE_ID(3)

           #include <nng/nng.h>

           int nng_pipe_id(nng_pipe p);