* Use non-blocking connect for TcpStream.
Instead of spawning a background thread which is unaware of any timeouts
but continues to run until the TCP stack decides that the remote is not
reachable we use mio's non-blocking connect.
mio's `TcpStream::connect` returns immediately but the actual connection
is usually just in progress and we have to be sure the socket is
writeable before we can consider the connection as established.
* Add Watcher::{poll_read_ready, poll_write_ready}.
Following a suggestion of @stjepang we offer methods to check for
read/write readiness of a `Watcher` instead of the previous approach to
accept a set of `Waker`s when registering an event source. The changes
relative to master are smaller and both methods look more useful in
other contexts. Also the code is more robust w.r.t. wakeups of the
`Waker` from clones outside the `Reactor`.
I am not sure if we need to add protection mechanisms against spurious
wakeups from mio. Currently we treat the `Poll::Ready(())` of
`Watcher::poll_write_ready` as proof that the non-blocking connect has
finished, but if the event from mio was a spurious one, it might still
be ongoing.
Moves the point of adding error context to the net::addr module so that
we have access to the raw address input and can include it in the error
message.
`once_cell` provides a neat way of initializing lazy singletons without
macro. This PR use `sync::Lazy` to streamline same pattern proposed in
related rust RFC.
Resolve#406
Previously all of the into_raw_fd implementations only returns a copy of
the inner RawFd, while still holding the ownership of the file
descriptor when returning for into_raw_fd. Since `self` is dropped at
the end of into_raw_fd, the returned file descriptor will actually be
closed, render the function unuseable.
The patch makes sure that into_raw_fd actually takes the ownership of
the file descriptor all the way from the inner IoHandle. To achieve
this, I have to use an Option in IoHandle to store the I/O source. It's
not pretty, but I cannot come up with a better way.
* Add future::poll_fn
* Replace all uses of poll_fn with the new one
* Remove some uses of futures
* Simplify ReadDir and DirEntry
* Remove some use of futures from File
* Use futures subcrates
* Fix imports in docs
* Remove futures-util dependency
* Remove futures-executor-preview
* Refactor
* Require more features in the futures-preview crate
* Implement an async version of ToSocketAddrs
* fix documentation issue
* genius hack: pretending to be `impl Future`
* replace `std::net::ToSocketAddrs` with `async-std::net::ToSocketAddrs`
* Move unit tests into the tests directory
* Stylistic changes
* Remove re-exports in async_std::net
* fix broken link
* some mirror changes
* remove unnecessary format
* migrate: `std::net::ToSocketAddrs` -> `async_std::net::ToSocketAddrs`
* fix typo(tutorial)
* remove unnecessary type bound
* lifetime for future
