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