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The functionality has been rolled into `tracing`. Who knew?
The `.run()` method in the driver API passed the set of driver channels in a type that was protected by a mutex. There was no need for the serialization because only the driver would be using the channels. Back when I wrote that code, I wasn't as experienced with Rust and so that's how I got it to work. Looking at it not, I realize that I should be able to pass a mutable borrow to the `.run()` method. This commit contains the following changes: - `.run()` now takes a mutable borrow instead of `Arc<Mutex<T>>` - We don't need the `tracing_futures` crate; the `tracing` crate now supports instrumenting futures - The number of async tasks required to support drivers has been reduced; the manager task runs asynchronously, but doesn't spawn a task for the driver. Instead, it itself calls the `.run()` method. It catches any panics, as well. This cuts the number of async tasks in half.
If a driver crashes, we need to set the driver channels into a known state. All types returned by the `Registrator` types must implement the `ResettableState` trait. The default implementation is to do nothing. Most types are fine with this. Types that need to do some resetting, can add their reset logic with this trait.
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Removes the need for the mutex in the drivers'
.run()method. Also cuts, by half, the number of async tasks to run the drivers.