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reword task finish and cancel

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Liigo Zhuang 2022-04-22 15:10:59 +08:00
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docs/modules/ROOT/pages/runtime.adoc
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@ -14,7 +14,7 @@ The Embassy runtime is an async/await executor designed for embedded usage along
== Executor
The executor function is described below. The executor keeps a queue of tasks that it should poll. When a task is created, it is polled (1). The task will attempt to make progress until it reaches a point where it would be blocked. This may happen whenever a task is .await'ing an async function. When that happens, the task yields execution by (2) returning `Poll::Pending`. Once a task yields, the executor enqueues the task at the end of the run queue, and proceeds to (3) poll the next task in the queue.
The executor function is described below. The executor keeps a queue of tasks that it should poll. When a task is created, it is polled (1). The task will attempt to make progress until it reaches a point where it would be blocked. This may happen whenever a task is .await'ing an async function. When that happens, the task yields execution by (2) returning `Poll::Pending`. Once a task yields, the executor enqueues the task at the end of the run queue, and proceeds to (3) poll the next task in the queue. When a task is finished or canceled, it will not be enqueued again.
IMPORTANT: The executor relies on tasks not blocking indefinitely, as this prevents the executor to regain control and schedule another task.