export declare const FRONTIER_RUNTIME_WORK_AREAS: readonly ["diff", "apply", "codec", "sync", "cache", "logging"];
export type FrontierRuntimeWorkArea = (typeof FRONTIER_RUNTIME_WORK_AREAS)[number] | 'other' | (string & {});
export type FrontierRuntimeTaskPriority = 'high' | 'normal' | 'low' | number;
export type FrontierRuntimeClock = () => number;
export interface FrontierRuntimeBudgetOptions {
    clock?: FrontierRuntimeClock;
    startMs?: number;
    maxMs?: number | null;
    maxUnits?: number | null;
}
export interface FrontierRuntimeBudgetSnapshot {
    startMs: number;
    nowMs: number;
    deadlineMs: number;
    elapsedMs: number;
    remainingMs: number;
    maxUnits: number;
    usedUnits: number;
    remainingUnits: number;
    exhausted: boolean;
}
export interface FrontierRuntimeBudget {
    readonly startMs: number;
    readonly deadlineMs: number;
    readonly maxUnits: number;
    readonly usedUnits: number;
    now(): number;
    elapsedMs(): number;
    remainingMs(): number;
    remainingUnits(): number;
    canRun(units?: number): boolean;
    shouldYield(units?: number): boolean;
    consume(units?: number): boolean;
    snapshot(): FrontierRuntimeBudgetSnapshot;
}
export interface FrontierRuntimeScheduledTask {
    id: string;
    area: FrontierRuntimeWorkArea;
    priority: number;
    units: number;
    queuedAt: number;
}
export interface FrontierRuntimeTask<TValue = unknown> {
    id?: string;
    area?: FrontierRuntimeWorkArea;
    priority?: FrontierRuntimeTaskPriority;
    units?: number;
    run: (budget: FrontierRuntimeBudget, task: FrontierRuntimeScheduledTask) => TValue | void;
}
export interface FrontierRuntimeSchedulerOptions extends FrontierRuntimeBudgetOptions {
    maxTasks?: number | null;
    areaUnitBudgets?: Readonly<Record<string, number | null | undefined>>;
    onTaskError?: (error: unknown, task: FrontierRuntimeScheduledTask) => void;
}
export interface FrontierRuntimeSchedulerRunOptions extends FrontierRuntimeBudgetOptions {
    maxTasks?: number | null;
    areaUnitBudgets?: Readonly<Record<string, number | null | undefined>>;
}
export interface FrontierRuntimeSchedulerSnapshot {
    pending: number;
    pendingByArea: Record<string, number>;
}
export interface FrontierRuntimeSchedulerRunResult extends FrontierRuntimeBudgetSnapshot {
    completed: number;
    failed: number;
    pending: number;
    completedByArea: Record<string, number>;
    failedByArea: Record<string, number>;
    pendingByArea: Record<string, number>;
    budgetExhausted: boolean;
    taskLimitReached: boolean;
}
export interface FrontierRuntimeScheduler {
    schedule<TValue = unknown>(task: FrontierRuntimeTask<TValue>): FrontierRuntimeScheduledTask;
    run(options?: FrontierRuntimeSchedulerRunOptions): FrontierRuntimeSchedulerRunResult;
    clear(area?: FrontierRuntimeWorkArea): number;
    getPendingCount(area?: FrontierRuntimeWorkArea): number;
    snapshot(): FrontierRuntimeSchedulerSnapshot;
}
export declare function createRuntimeBudget(options?: FrontierRuntimeBudgetOptions): FrontierRuntimeBudget;
export declare function createRuntimeScheduler(options?: FrontierRuntimeSchedulerOptions): FrontierRuntimeScheduler;
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