Addresses https://github.com/libp2p/rust-libp2p/issues/1206 by always
registering the current task before calling poll_*_notify functions.
This is in the same spirit as the corresponding fix for yamux
in https://github.com/paritytech/yamux/pull/54.
Also adds missing registration of the current task in close()
and flush_all(), which have been observed to cause stalls
when trying to do a graceful connection shutdown / close.
* muxing: adds an error type to streammuxer
* Update examples/chat.rs
Co-Authored-By: montekki <fedor.sakharov@gmail.com>
* make the trait error type bound to io error
mplex gets a new flag `is_shutdown` to keep track of when `shutdown` has
been called. We need to make certain that after the shutdown no more
`Sink::poll_complete` or `Sink::start_send` calls are being made which
may result in a panic.
Update the `StreamMuxer` trait.
- `read_substream`, `write_substream` and `flush_substream` now return `Poll` instead of `Result`.
- A new `Shutdown` enum allows for half-closing of substreams and is used in `shutdown_substream`.
- `close_inbound` and `close_outbound` have been merged into `shutdown` which takes a `Shutdown` parameter to allow closing only one direction.
- Add a new `flush_all` method to allow flushing after a series of actions (e.g. multiple `shutdown_substream`).
W.r.t. flushing the general idea is that normal use drains buffers over time. Shutting down a substream does not imply flushing, so can be followed by `flush_substream` or (if multiple substreams are to be shut down) a single `flush_all`. Shutting down the muxer itself proceeds likewise, i.e. `shutdown` followed by `flush_all`.
* Rewrite the swarm
* Small improvement to Debug of ListenersStream
* Fix Swarm::Replaced never being produced
* Fix logic problem when reaching a node in swarm
* Small comment in swarm
* Add closed_multiaddr to Replaced event
* Add address to NodeClosed and NodeError
* Fix concerns
* Remove StreamMuxer::boxed
Retain all incoming buffer elements with different substream ID or equal
Endpoint. The latter was previously not considered which could result in
the removal of data for another substream with same ID but opposite
Endpoint.
* Stronger typing for the swarm handler future
* The swarm future is now a swarm stream of events
* Rewrite StreamMuxer in core
* Update libp2p_mplex for the new stream muxer
* Update yamux for new stream muxer
