/**
 * Pool for managing instance IDs efficiently
 * Reuses released IDs to minimize fragmentation
 */
export declare class InstancePool {
    private activeInstances;
    private freeIds;
    private nextId;
    private maxInstances;
    constructor(maxInstances: number);
    /**
     * Acquire a new instance ID
     * @returns Instance ID or null if pool is exhausted
     */
    acquire(): number | null;
    /**
     * Release an instance ID back to the pool
     * @param id - Instance ID to release
     */
    release(id: number): void;
    /**
     * Get pool statistics
     */
    getStats(): {
        active: number;
        total: number;
        max: number;
    };
    /**
     * Get highest active instance ID.
     * Returns -1 when no instances are active.
     */
    getHighestActiveId(): number;
    /**
     * Clear all instances from the pool
     */
    clear(): void;
    /**
     * Check if the pool has available capacity
     */
    hasCapacity(): boolean;
    /**
     * Get the number of active instances
     */
    getActiveCount(): number;
}
//# sourceMappingURL=InstancePool.d.ts.map