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Add guarantee about when a spawned task may be polled #5816

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Jun 27, 2023
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Add guarantee about when a spawned task may be polled #5816

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4 changes: 4 additions & 0 deletions tokio/src/task/spawn.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,10 @@ cfg_rt! {
/// different thread to be executed. The specifics depend on the current
/// [`Runtime`](crate::runtime::Runtime) configuration.
///
/// It is guaranteed that spawn will not synchronously poll the task being spawned.
/// This means that calling spawn while holding a lock does not pose a risk of
/// deadlocking with the spawned task.
///
/// There is no guarantee that a spawned task will execute to completion.
/// When a runtime is shutdown, all outstanding tasks are dropped,
/// regardless of the lifecycle of that task.
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