Combined wait for pcm_wait and ctl_wait

Hi,

Please is there any way to wait for nonblocking read/write at min_avail (like snd_pcm_wait) AND nonblocking subscribed ctl event (like snd_ctl_wait) in a single combined wait? The goal is to react as fast as possible to ctls in aloop and audio gadget devices which notify about stream stop and start (at new rate/format/channel count) on the other side.

I guess some wizardry with file descriptors and polling multiple fds could do.

Thanks a lot for any help or hints.

Best regards,

Pavel.