How to implement process_relight concurrent calls?

[isgbuddy]

executor = ThreadPoolExecutor()

    # 异步调用 process_relight 函数
    processed_fg, results = await async_process_relight(
        input_fg=input_fg,
        prompt=prompt,
        image_width=image_width,
        image_height=image_height,
        num_samples=num_samples,
        seed=seed,
        steps=steps,
        a_prompt=a_prompt,
        n_prompt=n_prompt,
        cfg=cfg,
        highres_scale=highres_scale,
        highres_denoise=highres_denoise,
        lowres_denoise=lowres_denoise,
        bg_source=bg_source
    )

   async def async_process_relight(input_fg, prompt, image_width, image_height, num_samples, seed, steps, a_prompt, n_prompt, cfg,
                            highres_scale, highres_denoise, lowres_denoise, bg_source):
loop = asyncio.get_event_loop()
# 使用 *args 传递位置参数，而不是关键字参数
return await loop.run_in_executor(
    executor,
    process_relight,
    input_fg, prompt, image_width, image_height, num_samples, seed, steps, a_prompt, n_prompt, cfg,
    highres_scale, highres_denoise, lowres_denoise, bg_source
)

These codes can do async call process_relight ok. But don't create result image at the same time.