pub struct TaskQueue<T> {
    port: Receiver<T>,
    wake_up_sender: Sender<T>,
    msg_queue: DomRefCell<VecDeque<T>>,
    taken_task_counter: Cell<u64>,
    throttled: DomRefCell<HashMap<TaskSourceName, VecDeque<(Option<Trusted<Worker>>, ScriptThreadEventCategory, Box<dyn TaskBox>, Option<PipelineId>, TaskSourceName)>>>,
    inactive: DomRefCell<HashMap<PipelineId, VecDeque<(Option<Trusted<Worker>>, ScriptThreadEventCategory, Box<dyn TaskBox>, Option<PipelineId>, TaskSourceName)>>>,
}

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§port: Receiver<T>

The original port on which the task-sources send tasks as messages.

§wake_up_sender: Sender<T>

A sender to ensure the port doesn’t block on select while there are throttled tasks.

§msg_queue: DomRefCell<VecDeque<T>>

A queue from which the event-loop can drain tasks.

§taken_task_counter: Cell<u64>

A “business” counter, reset for each iteration of the event-loop

§throttled: DomRefCell<HashMap<TaskSourceName, VecDeque<(Option<Trusted<Worker>>, ScriptThreadEventCategory, Box<dyn TaskBox>, Option<PipelineId>, TaskSourceName)>>>

Tasks that will be throttled for as long as we are “busy”.

§inactive: DomRefCell<HashMap<PipelineId, VecDeque<(Option<Trusted<Worker>>, ScriptThreadEventCategory, Box<dyn TaskBox>, Option<PipelineId>, TaskSourceName)>>>

Tasks for not fully-active documents.

Implementations§

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impl<T: QueuedTaskConversion> TaskQueue<T>

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pub fn new(port: Receiver<T>, wake_up_sender: Sender<T>) -> TaskQueue<T>

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fn release_tasks_for_fully_active_documents(
    &self,
    fully_active: &HashSet<PipelineId>
) -> Vec<T>

Release previously held-back tasks for documents that are now fully-active. https://html.spec.whatwg.org/multipage/#event-loop-processing-model:fully-active

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fn store_task_for_inactive_pipeline(&self, msg: T, pipeline_id: &PipelineId)

Hold back tasks for currently not fully-active documents. https://html.spec.whatwg.org/multipage/#event-loop-processing-model:fully-active

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fn process_incoming_tasks(&self, first_msg: T, fully_active: &HashSet<PipelineId>)

Process incoming tasks, immediately sending priority ones downstream, and categorizing potential throttles.

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pub fn select(&self) -> &Receiver<T>

Reset the queue for a new iteration of the event-loop, returning the port about whose readiness we want to be notified.

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pub fn recv(&self) -> Result<T, ()>

Take a message from the front of the queue, without waiting if empty.

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pub fn try_recv(&self) -> Result<T, ()>

Same as recv.

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pub fn take_tasks(&self, first_msg: T)

Drain the queue for the current iteration of the event-loop. Holding-back throttles above a given high-water mark.

Trait Implementations§

Auto Trait Implementations§

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impl<T> !RefUnwindSafe for TaskQueue<T>

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impl<T> Send for TaskQueue<T>where
    T: Send,

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impl<T> !Sync for TaskQueue<T>

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impl<T> Unpin for TaskQueue<T>where
    T: Unpin,

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impl<T> !UnwindSafe for TaskQueue<T>

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impl<T> Any for Twhere
    T: 'static + ?Sized,

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Gets the TypeId of self. Read more
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    T: ?Sized,

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Immutably borrows from an owned value. Read more
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Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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Convert
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The alignment of pointer.
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Dereferences the given pointer. Read more
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type Output = T

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    U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

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