export declare type ThreadTaskData = ArrayBuffer | Uint8Array | Uint16Array | Uint32Array | Float32Array | Float64Array;
export interface ThreadTaskDataObject {
    [index: string]: ThreadTaskData | ThreadTaskData[] | ThreadTaskDataObject;
}
export interface ThreadTask {
    task: "chunk-generation" | "init-chunk-generator" | "chunk-geometry" | "init-geometry-generator";
    data: ThreadTaskData | ThreadTaskData[] | ThreadTaskDataObject;
    cb?: (data?: any) => void;
}
export default class Thread {
    private worker;
    private inUse;
    private currentTask;
    private queue;
    private maxQueueSize;
    private id;
    private cleanRate;
    /**
     * Creates a {@link Thread} instance, sets up it's worker and starts it's cleaning loop.
     *
     * @param id A string to be used as an identifier for this thread.
     */
    constructor(id: string);
    /**
     * Sets up the thread's worker and it's associated events.
     */
    private setupWorker;
    /**
     * Handles a message from the thread's worker
     *
     * @param msg The message received from the worker
     */
    private handleMessage;
    /**
     * Attempts to run a task on the thread or add it to the queue.
     *
     * @param task The task to run or queue.
     * @param skipQueue If true then the max queue size is ignored and the task is prepended to the front of the queue
     * @returns True when the task is ran or queued, false otherwise
     */
    addTask(task: ThreadTask, skipQueue?: boolean): boolean;
    /**
     * Sends a task to the thread's worker, saves a reference to the sent task and marks the thread as in use.
     *
     * No checks are made to see if the thread is in use before sending the task.
     *
     * @param task The task to send to the thread's worker.
     */
    private sendTask;
    /**
     * Sends the next task in the thread's queue to it's worker.
     *
     * If the queue is empty then the thread marks itself as not in use.
     */
    private nextTask;
    /**
     * Attempts to clean out the thread's queue whenever the thread has hung.
     *
     * A hung thread is one in which the thread is not in use but it has task(s) in it's queue.
     */
    private clean;
    /**
     * Returns wether the thread is currently in use.
     *
     * This is true when the thread's worker is currently processing a task.
     *
     * @returns If the thread is currently in use.
     */
    getInUse(): boolean;
    /**
     * A thread is free when it is not in use or the queue size is below the thread's maximum queue size
     *
     * @returns true/false depending on if the thread is free
     */
    isFree(): boolean;
    /**
     * Gets the number of task in the thread's queue.
     *
     * @returns The length of the thread's queue.
     */
    getNumInQueue(): number;
    /**
     * Gets the thread's id.
     *
     * @returns The thread's id
     */
    getId(): string;
    /**
     * Prepends a console.log call with the thread's id.
     *
     * @param params Params for `console.log`
     */
    private log;
}