The thread pool optimizes cases where a task currently running on the
pool spawns a new future. However, the optimization did not factor in
cases where two thread pools interacted.
This patch fixes the optimization and includes a test.
Fixes#342
This patch adds a `blocking` to `tokio-threadpool`. This function serves
as a way to annotate sections of code that will perform blocking
operations. This informs the thread pool that an additional thread needs
to be spawned to replace the current thread, which will no longer be
able to process the work queue.
Replaces homegrown Arc with std Arc
Is this safer? Unknown. At least we don't have to maintain an arc
implementation anymore. This will also make it easier to filter out tsan
false positives.
Also split task/mod.rs into multiple files.
Carl Lerche