[Openal] Do any implementations support alcSuspendContext correctly?

[E. Wing]

I am looking at the Mac OS X implementation of alcSuspendContext
(partly because I am trying to figure out the best way to handle a
phone call interruption on iPhone).

I discovered that it is a no-op. I found the following comment in the code:

	// This code breaks Doom 3 [4554491] - The 1.0 implementation was a no op.
	// Since alcProcessContext()/alcSuspendContext() are also no ops on
sound c ards with OpenAL imps, this should be ok

I was rather startled at the claim that nobody implemented this.

I skimmed through the OpenAL Soft code, and it looks like a no-op there too.

On iPhone, it seems to behave as a no-op. But interestingly, if I make
the current context NULL, the behavior acts like a SuspendContext,
where the audio state pauses. So if I was in the middle of a sound,
when I resume the context after some arbitrary amount of time, the
sound resumes from where it lefts off.

But thinking about this, this is really not the behavior I want from
switching contexts. I've been toying with a multiple view design
pattern for Mac desktop applications where I have multiple OpenGL
views (each with a separate context). I want to mirror that with each
having its own OpenAL context to go with each view. When the user
changes the active view focus, I want to switch OpenAL contexts to the
new active view. But if a sound was in the middle of playing on the
context that is being swapped out, I don't necessarily want the
context suspended. (The audio is likely coordinated with the visuals
and the visuals keep moving as they may be visualizing live data.)

Any how, I am wondering, do any implementations out there support
alcSuspendContext correctly? And do all the implementations suspend
the context if you swap out the current context?

Thanks,
Eric