Module task_pool 

TaskPool: a minimal bounded async executor, no external runtime.

The substrate’s rings are executor-agnostic (any std::future executor drives them). TaskPool is the proof that “any” includes “a tiny one we ship ourselves”: a fixed pool of worker threads running an arbitrary number of suspended tasks. There is no tokio, no reactor, no per-task thread. A task that awaits a ring parks its Waker in the ring (see crate::waker_ring); the producer’s push fires that Waker, which re-enqueues the task here, and a worker polls it. M threads, N tasks, with M fixed and N unbounded.

The ready queue is a Mutex<VecDeque> + Condvar on purpose: the executor’s own scheduling is not the thing under test, and a std-only queue keeps the dependency surface at zero.

Structs

TaskPool

A fixed-size pool of worker threads driving an unbounded set of suspended tasks.