mirrors/arti.git/crates/tor-rtcompat/src/scheduler.rs, branch arti-v1.1.1

Temporarily disable it_cancels_delayed_firings.

2022-11-10T16:58:35Z

This test is timing-dependent in a way that seems to fail on heavily loaded CI machines. See #545.

`TaskSchedule`: give error on `sleep*()` if last handle is dropped

2022-09-07T13:22:38Z

This fixes an busy-loop. When the last `TaskHandle` on a `TaskSchedule` is dropped, the schedule is permanently canceled: whatever operation it was scheduling should no longer be performed. But our code was broken: the `sleep()` and `sleep_until_wallclock()` functions don't verify whether the handles are dropped or not. This breakage caused an CPU-eating busy-loop in `sleep_until_wallclock`. With this patch, we now return a `Result<(), SleepError>` from these functions. Fixes #572.

tor-rtcompat: s/micros/millis inside a flaky test

2022-07-26T14:01:03Z

The other tests wait for 100 milliseconds; this one waits for 100 *microseconds* for some reason, which meant it was understandably flaky if run on anything less than perfect conditions (arti#515). This is probably a typo, so just change it. fixes arti#515

TaskSchedule: Add a sleep_until_wallclock method too.

2022-06-10T17:59:30Z

Add a `sleep` function to TaskSchedule.

2022-06-07T14:41:44Z

Having this alias makes it easier to implement more complex schedules, like those used in DirMgr.

Add "suspend" and "resume" to TaskSchedule.

2022-06-07T14:11:49Z

Unlike "cancel" and "fire", "suspend" and "resume" don't change any pending timers or events: they just prevent execution of those events for a while, and let them resume later on.

Make daemon tasks self-contained; introduce NetDirProvider

2022-03-30T13:26:43Z

The various background daemon tasks that `arti-client` used to spawn are now handled inside their respective crates instead, with functions provided to spawn them that return `TaskHandle`s. This required introducing a new trait, `NetDirProvider`, which steals some functionality from the `DirProvider` trait to enable `tor-circmgr` to depend on it (`tor-circmgr` is a dependency of `tor-dirmgr`, so it can't depend on `DirProvider` directly). While we're at it, we also make some of the tasks wait for events from the `NetDirProvider` instead of sleeping, slightly increasing efficiency.

tor-rtcompat/scheduler: add unit tests, FireIn -> FireAt

2022-03-24T14:07:40Z

Addressing review comments: added some unit tests for the new scheduler type, and made FireIn use an Instant instead (making it FireAt).

Implement a periodic task scheduler, and a basic dormant mode

2022-03-23T13:43:48Z

This is a revised version of !397; it implements a scheduling system for periodic tasks that can be externally controlled, and then uses the external control aspect to implement a basic dormant mode (#90). More technically, the scheduling system consists of a `Stream` that periodic tasks are expected to embed in a `while` loop or similar, a way for tasks themselves to choose how long to wait until the stream next yields a result, and a handle to control this outside of the task.