import type { IDisposable } from '../dispose/disposable.js';
import { DisposableOnce } from '../dispose/sync-disposable.js';
import type { EventHandler } from '../event/type.js';
/** @public */
export interface CancellationToken {
    readonly isCancellationRequested: boolean;
    onCancellationRequested(callback: EventHandler<void>): IDisposable;
}
/** @private */
export interface CancellationDriver extends IDisposable {
    readonly token: CancellationToken;
    cancel(): void;
}
/** @public */
export declare class CancellationTokenSource extends DisposableOnce implements IDisposable {
    private readonly driver;
    readonly token: CancellationToken;
    constructor();
    cancel(): void;
    _dispose(): void;
}
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