winealsa: implement opening and closing of device, and return caps.

[Alexandre Julliard]

Maarten Lankhorst <m.b.lankhorst at gmail.com> writes:

> +/* Note: this thread can be TerminateThread'd, when not in critical section
> + * Hence I use alloca here, and a critical section to protect when it is not
> + * desired to be TerminateThread'd, assume when the critical section is taken
> + * we won't ever get it back and we're signalled to terminate
> + */
> +static DWORD WINAPI callback_thread(LPVOID lParam)

You can't use TerminateThread for normal termination, it should only
be used for fatal erros when cleaning up properly is not
possible. Also please don't use alloca.

-- 
Alexandre Julliard
julliard at winehq.org