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Carl Lerche
db620b42ec
Currently, the timer uses a `Now` trait to abstract the source of time. This allows time to be mocked out. However, the current implementation has a number of limitations as represented by #288 and #296. The main issues are that `Now` requires `&mut self` which prevents a value from being easily used in a concurrent environment. Also, when wanting to write code that is abstract over the source of time, generics get out of hand. This patch provides an alternate solution. A new type, `Clock` is provided which defaults to `Instant::now` as the source of time, but allows configuring the actual source using a new iteration of the `Now` trait. This time, `Now` is `Send + Sync + 'static`. Internally, `Clock` stores the now value in an `Arc<Now>` value, which introduces dynamism and allows `Clock` values to be cloned and be `Sync`. Also, the current clock can be set for the current execution context using the `with_default` pattern. Because using the `Instant::now` will be the most common case by far, it is special cased in order to avoid the need to allocate an `Arc` and use dynamic dispatch.
tokio-timer
Timer facilities for Tokio
Overview
This crate provides timer facilities for usage with Tokio.
License
This project is licensed under the MIT license.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in Tokio by you, shall be licensed as MIT, without any additional terms or conditions.