Struct TaskQueue 

pub struct TaskQueue { /* private fields */ }

A single FIFO task queue with enable/disable support.

Like Chrome’s base::sequence_manager::TaskQueue. Each priority level in the scheduler owns one TaskQueue.

Chrome features mapped

Chrome	Kozan
TaskQueue::SetQueueEnabled()	set_enabled()
TaskQueue::InsertFence()	(future: set_fence()
TaskQueue::GetNumberOfPending	len()
PushBack / TakeTask	push() / pop()

Implementations

impl TaskQueue

pub fn new(priority: TaskPriority) -> Self

Create a new empty queue for the given priority.

pub fn push(&mut self, task: Task)

Push a task to the back of the queue.

pub fn pop(&mut self) -> Option<Task>

Pop the front task. Returns None if empty or disabled.

pub fn front(&self) -> Option<&Task>

Peek at the front task without removing it.

pub fn len(&self) -> usize

Number of tasks in this queue (regardless of enabled state).

pub fn is_empty(&self) -> bool

Whether this queue has no tasks.

pub fn has_ready(&self) -> bool

Whether this queue has tasks AND is enabled (actually pickable).

pub fn is_enabled(&self) -> bool

Whether this queue is enabled.

pub fn set_enabled(&mut self, enabled: bool)

Enable or disable this queue.

Disabled queues are skipped by TaskQueueManager::pick(). Chrome uses this to throttle background tab timers.

pub fn priority(&self) -> TaskPriority

The priority level this queue serves.