`inner` is a fitting name for variables of type named `Inner`, but in other cases I find them confusing - sometimes `inner` refers to a `Pool`, sometimes to a `Sender`. I renamed a bunch of variables named `inner` to be more descriptive.
This PR is the first step in an effort of splitting https://github.com/tokio-rs/tokio/pull/722#issuecomment-439552671 into multiple PRs.
When spawning using `Handle` while on the executor, tasks were being
double counted. This prevented the number of active tasks to reach zero,
thus preventing the executor from shutting down.
This changes `spawn` to check if being called from the executor
**before** incrementing the number of active tasks.
Fixes#760
Should hopefully fix the underlying bug that was causing tokio-tls tests to occasionally fail on Windows.
Signed-off-by: Toby Lawrence <[email protected]>
* async-await: fix README example dependencies
As per commit "async-await: track nightly changes (#661)" ( commit
2f690d30bc)
> The `tokio-async-await` crate is no longer a facade. Instead, the
> `tokio` crate provides a feature flag to enable async/await support.
Ensure the example in the async-await README file also works by
correctly declaring this updated dependency
* async-await: remove unnecessary 'edition' declaration from README
As the "edition" feature was stabilized in rust v1.30 and async-await
specifies that the nightly toolchain must be used, remove the use of the
"edition" feature gate since it is enabled by default.
* Minimize allocation needed for channels
* Use a newtype for signal ids
* We can just cast the raw pointer to a `usize` and still perform a
simple identity check, without incurring any implications of storing a
raw pointer (e.g. previously Signal was !Sync and had an unsafe impl of
Send, and now it is naturally Sync+Send)
* Broadcast with `try_send` instead of `start_send`
The `Stream::start_send` method uses backpressure and schedules the
current task to be notified whenever the channel has additional room,
which means we'll generate a lot of unnecessary wakeups whenever a
channel gets full
By changing to `try_send` and handling any errors, we ensure the
Driver's task won't get woken up when a Signal finally consumes its
notification, since we're coalescing things anyway
* udp: add `into_parts` to `RecvDgram`
If `RecvDgram` can not be driven to completion it may become necessary to get back the `UdpSocket` it contains which is currently not possible.
This adds`into_parts` to get the socket as well as the buffer back. Both methods consume `RecvDgram`.
Note that after the future has completed, `into_parts` must not be used, or else a panic will happen.
## Motivation
tokio depends on an out of date version of crossbeam-utils, which results in multiple versions of that package being linked in binaries which use other popular libraries.
## Solution
Bump the version; there's no API changes and tests still pass.
* rt: fix `Runtime::reactor()` as used by tokio-core
Up until Tokio v0.1.11, the handle returned by `Runtime::reactor()`
pointed to a reactor instance running in a background thread. The thread
was eagerly spawned.
As of v0.1.12, a reactor instance is created per runtime worker thread.
`Runtime::reactor()` was deprecated and updated to point to the reactor
for one of the worker threads.
A problem occurs when attempting to use the reactor before spawning a
task. Worker threads are spawned lazily, which means that the reactor
referenced by `Runtime::reactor()` is not yet running.
This patch changes `Runtime::reactor` back to a dedicated reactor
running on a background thread. However, the background thread is now
spawned lazily when the deprecated function is first called.
Fixes#720
* Fix comment
Co-Authored-By: carllerche <[email protected]>
- `tokio::run` checks Enter before creating a new threadpool and
spawning the main future.
- `Runtime::block_on` now checks Enter
- `Runtime::block_on_all` now checks Enter
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## Motivation
Now that each worker thread drives its own reactor, reactors have to be driven until the threadpool shuts down. We mustn't use the `keep_alive` setting to shut down a worker thread if it doesn't receive an event from the reactor for a certain duration of time.
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## Solution
Just ignore the `keep_alive` setting when parking in `Worker::sleep`.
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Fixes: #681
## Motivation
Currently, a potential panic exists in `LengthDelimitedCodec::encode`.
Writing the length field to the `dst` buffer can exceed the buffer
capacity, as `BufMut::put_uint_{le,be}` doesn't reserve more capacity.
## Solution
This branch adds a call to `dst.reserve` to ensure that there's
sufficient remaining buffer capacity to hold the length field and
the frame, prior to writing the length field. Previously, capacity
was only reserved later in the function, when writing the frame
to the buffer, and we never reserved capacity for the length field.
I've also added a test that reproduces the issue. The test panics on
master, but passes after making this change.
Signed-off-by: Eliza Weisman <[email protected]>
Carl Lerche