import { mo } from '../../src/index.ts';
import type { SharedStruct, Int32, Mutex } from '../../src/index.ts';

type Position = SharedStruct<{ x: Int32; y: Int32 }>;

export const updatePosition = mo(
  import.meta,
  async (mu: Mutex, pos: Position, dx: number, dy: number, steps: number): Promise<void> => {
    for (let i = 0; i < steps; i++) {
      using guard = await mu.lock();
      const current = pos.load();
      pos.store({ x: current.x + dx, y: current.y + dy });
    }
  },
);