typedef struct nng_pipe_s nng_pipe;
nng_pipe is a handle to a “pipe”, which can be thought of as a single
(In most cases this is actually the case — the pipe is an abstraction for a
single TCP or IPC connection.)
Pipes are associated with either the listener or dialer that created them,
and therefore are also automatically associated with a single socket.
nng_pipe structure is always passed by value (both
for input parameters and return values), and should be treated opaquely.
Passing structures this way gives the compiler a chance to perform
accurate type checks in functions passing values of this type.
|Most applications should never concern themselves with individual pipes. However it is possible to access a pipe when more information about the source of a message is needed, or when more control is required over message delivery.
Pipe objects may be destroyed by the
They are also closed when their “owning” dialer or listener is closed,
or when the remote peer closes the underlying connection.
A pipe may be initialized using the macro
before it is opened, to prevent confusion with valid open pipes.
nng_pipe p = NNG_PIPE_INITIALIZER;