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[EventEngine] Document RunAfter can return an invalid handle for immediate execution (#36072) 

Closes #36072

COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/36072 from drfloob:docs/runafter-immediate-invalid-handle 4ce2dd7dd1
PiperOrigin-RevId: 613737590
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AJ Heller 2024-03-07 16:21:50 -08:00 committed by Copybara-Service
parent 3032b5c48d
commit ad7fbc1e92
1 changed files with 3 additions and 0 deletions
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3
include/grpc/event_engine/event_engine.h
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@ -444,6 +444,9 @@ class EventEngine : public std::enable_shared_from_this<EventEngine>,
///
/// Implementations must not execute the closure in the calling thread before
/// \a RunAfter returns.
///
/// Implementations may return a \a kInvalid handle if the callback can be
/// immediately executed, and is therefore not cancellable.
virtual TaskHandle RunAfter(Duration when, Closure* closure) = 0;
/// Synonymous with scheduling an alarm to run after duration \a when.
///