[alsa-devel] Coherence of status structure after SYNC_PTR

In alsa-lib, pcm_hw, htimestamp(), avail is rechecked to ensure a valid timestamp.

I guess this is for the case when status is mmaped, when hardware pointer is read, an interrupt occur, and timestamp is read.

Does SYNC_PTR ioctl always fill a coherent status?

Cheers!

pasquali