Module waker 

Zero-allocation waker using atomic priority bitmaps.

Each task has a (priority, index_in_priority) pair. When a waker fires, it atomically sets the corresponding bit in the per-priority queue and the global ready bitmap. The executor finds the next task in O(1) using leading_zeros on the bitmap.

Functions

broadcast_reschedule

Kick every other hart so an executor idling in wfi/waiti on a different core notices new ready work. Exposed separately from wake_task so a caller waking several tasks in one batch (e.g. timer::poll_timers scanning every expired deadline inside one critical section) can broadcast once instead of once per task.

reset

Reset the waker state (for testing).

task_waker

Create a Waker for the task identified by id.

wake_task

Mark id ready and broadcast a reschedule request to every other hart.