winealsa: improve sound quality for IDsDriverImpl

[Alexandre Julliard]

Jerry Jenkins <Jerry_J_Jenkins at hotmail.com> writes:

> Based on this thought, I need a function to retrieve the buffer. Then
> I found that snd_pcm_mmap_begin is the right one. But no documents
> said that it is responsible for return the driver's buffer. Well, I
> can verify that, and the result is really delightful for the time
> being. In the long run I prefer the configure time check. I can check
> that at runtime in DSDB_MMAPCopy and print some messages if the
> behavior of snd_pcm_mmap_begin changes, but I can't prevent others
> from accessing the buffer before DSDB_MMAPCopy check it.

If the behavior is subject to change, there is no way you can test
that at configure time. This needs to be a run time check.

-- 
Alexandre Julliard
julliard at winehq.com