41 lines
1.4 KiB
TypeScript
Executable file
41 lines
1.4 KiB
TypeScript
Executable file
/**
|
|
* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*/
|
|
import type { QueueChildMessage, TaskQueue } from './types';
|
|
export declare type ComputeTaskPriorityCallback = (method: string, ...args: Array<unknown>) => number;
|
|
declare type QueueItem = {
|
|
task: QueueChildMessage;
|
|
priority: number;
|
|
};
|
|
/**
|
|
* Priority queue that processes tasks in natural ordering (lower priority first)
|
|
* accoridng to the priority computed by the function passed in the constructor.
|
|
*
|
|
* FIFO ordering isn't guaranteed for tasks with the same priority.
|
|
*
|
|
* Worker specific tasks with the same priority as a non-worker specific task
|
|
* are always processed first.
|
|
*/
|
|
export default class PriorityQueue implements TaskQueue {
|
|
private _computePriority;
|
|
private _queue;
|
|
private _sharedQueue;
|
|
constructor(_computePriority: ComputeTaskPriorityCallback);
|
|
enqueue(task: QueueChildMessage, workerId?: number): void;
|
|
_enqueue(task: QueueChildMessage, queue: MinHeap<QueueItem>): void;
|
|
dequeue(workerId: number): QueueChildMessage | null;
|
|
_getWorkerQueue(workerId: number): MinHeap<QueueItem>;
|
|
}
|
|
declare type HeapItem = {
|
|
priority: number;
|
|
};
|
|
declare class MinHeap<TItem extends HeapItem> {
|
|
private _heap;
|
|
peek(): TItem | null;
|
|
add(item: TItem): void;
|
|
poll(): TItem | null;
|
|
}
|
|
export {};
|