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Note that this brings in a lot of machinery just for the sake of
wrapping file descriptors as PollEvented. This should maybe be moved
into the public API of some crate.
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traits into `Codec`
A previous commit refactored such that `Encode` and `Decode` are
implemented directly on the types being encoded or decoded. This was
thought to be less expressive but more convenient than having a separate
notion of a (stateful) encoder or decoder.
However, there are certain situations where the approach is just too
limiting: you're required to implemented `Decode` and `Encode` for types
you don't "own" and can't newtype.
This commit moves back to a setup where `Self` represents the
encoder/decoder state; it also merges the two traits into a single
`Codec` trait, since they are currently always used together.
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- Gets rid of `easy` module, instead providing framing support directly
in the `io` module.
- In particular, adds a framing adapter directly to the `Io` trait,
which gives you a Stream + Sink object. That object can then be
`split` into separate `Stream` and `Sink` objects if needed.
- Deprecates the `FramedIo` trait; that's now just Stream + Sink.
- Updates the line framing test to use the stream/sink combinators.
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This commit makes a few tweaks to the new `easy` module:
- Rename `Parse` to `Decode`, and `Serialize` to `Encode`.
- Don't use `Poll` for the `decode` method; we prefer to reserve
that type for actual aync events, and in particular for a `NotReady`
result to imply that some task scheduling has taken place. Instead,
use an internal `Option`.
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This commit extracts the concrete implementation of `FrameIo` in tokio-proto to
tokio-core under the name `EasyFramed`. This extraction is accompanied with a
new `EasyBuf` buffer type to work with when parsing types.
The purpose of this movement is to provide a clear and easy entry point at the
`FramedIo` layer for those who need it. Eventually these buffer types will get
replaced or moved to the `bytes` crate, but in the interest of an 0.1 release
and remaining backwards compatible with the tokio-core 0.1 release this is
adding a separate module.
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Closes #22
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* Handle -> Remote
* Pinned -> Handle
All APIs now take a `&Handle` by default and in general can return an immediate
`io::Result` instead of an `IoFuture`. This reflects how most usage will likely
be done through handles rather than remotes, and also all previous functionality
can be recovered with a `oneshot` plus `Remote::spawn`.
Closes #15
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* Remove TaskIo
* task_split -> split
* TaskIoRead -> ReadHalf
* TaskIoWrite -> WriteHalf
Closes #18
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Renamed APIs
* Loop => reactor::Core
* LoopHandle => reactor::Handle
* LoopPin => reactor::Pinned
* TcpStream => net::TcpStream
* TcpListener => net::TcpListener
* UdpSocket => net::UdpSocket
* Sender => channel::Sender
* Receiver => channel::Receiver
* Timeout => reactor::Timeout
* ReadinessStream => reactor::PollEvented
* All `LoopHandle` methods to construct objects are now free functions on the
associated types, e.g. `LoopHandle::tcp_listen` is now `TcpListener::bind`
* All APIs taking a `Handle` now take a `Handle` as the last argument
* All future-returning APIs now return concrete types instead of trait objects
Added APIs
* io::Io trait -- Read + Write + ability to poll
Removed without replacement:
* AddSource
* AddTimeout
* IoToken
* TimeoutToken
Closes #3
Closes #6
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* Remove `LoopData` as it's no longer necessary
* Add `LoopHandle::spawn` to spawn new futures onto an event loop
* Add `LoopData::spawn` to also spawn new futures onto an event loop
* Rejigger the implementation of the event loop a bit (make a slab of futures),
but otherwise everything else is pretty constant.
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Renames the futures-mio crate to tokio-core, pulls in the futures-io crate under
an `io` module, and gets everything compiling.
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We know that the future will never persist beyond this stack frame, so we can
just leave its ownership on the stack frame itself and receive notifications off
the event loop that we need to poll it.
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* Auto-register interest whenever we see WouldBlock
* Remove implementations of `Stream<Item=Ready>`, no longer needed
* Add explicit `poll_{read,write}` methods, if needed
* Remove all I/O streams, libstd ones suffice
* Update all I/O futures
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A more appealing model is actually just automatically inferring what needs to be
scheduled based on what actions are done during poll. For example if during a
poll you check a oneshot channel, then the current task is registered for being
woken up if it's not ready. Similarly this will apply to I/O where if I/O is
attempted but we see EAGAIN then we'll schedule the task to get notified when
it's ready.
This may also have performance benefits in some niche situations because you
don't need to recompute where you are in the state machine both during poll and
during schedule. Instead, it now happens all at once.
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We're not NotReady until we hit the final future and it's not done.
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Move tests into that module
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