This builds on https://github.com/tokio-rs/mio/pull/1351 and introduces the
tokio::net::windows::named_pipe module which provides low level types for
building and communicating asynchronously over windows named pipes.
Named pipes require the `net` feature flag to be enabled on Windows.
Co-authored-by: Alice Ryhl <[email protected]>
When aborting a task registered with a current-thread scheduler from off runtime, the tasks may not
be immediately unlinked from the runtime. Instead, send a message to the runtime, notifying it to
remove the aborted task.
Fixes#3662
A call to `JoinHandle::abort` releases a task. When called from outside of the runtime,
this panics due to the current implementation checking for a thread-local worker context.
This change makes accessing the thread-local context optional under release, by falling
back to remotely marking a task remotely as dropped. Behaving the same as if the core
was stolen by another worker.
Fixes#3157
* sync: Implement map methods of parking_lot fame
Generally, this mimics the way `MappedRwLock*Guard`s are implemented in
`parking_lot`. By storing a raw pointer in the guards themselves
referencing the mapped data and maintaining type invariants through
`PhantomData`. I didn't try to think too much about this, so if someone
has objections I'd love to hear them.
I've also dropped the internal use of `ReleasingPermit`, since it made
the guards unecessarily large. The number of permits that need to be
released are already known by the guards themselves, and is instead
governed directly in the relevant `Drop` impls. This has the benefit of
making the guards as small as possible, for the non-mapped variants this
means a single reference is enough.
`fmt::Debug` impls have been adjusted to behave exactly like the
delegating impls in `parking_lot`. `fmt::Display` impls have been added
for all guard types which behave the same. This does change the format
of debug impls, for which I'm not sure if we provide any guarantees.
Generally, this mimics the way `MappedRwLock*Guard`s are implemented in
`parking_lot`. By storing a raw pointer in the guards themselves
referencing the mapped data and maintaining type invariants through
`PhantomData`. I didn't try to think too much about this, so if someone
has objections I'd love to hear them.
I've also dropped the internal use of `ReleasingPermit`, since it made
the guards unecessarily large. The number of permits that need to be
released are already known by the guards themselves, and is instead
governed directly in the relevant `Drop` impls. This has the benefit of
making the guards as small as possible, for the non-mapped variants this
means a single reference is enough.
`fmt::Debug` impls have been adjusted to behave exactly like the
delegating impls in `parking_lot`. `fmt::Display` impls have been added
for all guard types which behave the same. This does change the format
of debug impls, for which I'm not sure if we provide any guarantees.
`is_terminated` must return `true` until the future has been polled at least once to make sure that the associated block in select is called even after the delay has elapsed.
You use `Delay` in a `select!` by [fusing it](https://docs.rs/futures-preview/0.3.0-alpha.19/futures/future/trait.FutureExt.html#method.fuse):
```rust
let delay = tokio::timer::delay(/* ... */);
let delay = delay.fuse();
select! {
_ = delay => {
/* work here */
}
}
```
John-John Tedro