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Re: Can I export multiple user client objects on my kext?

Subject: Re: Can I export multiple user client objects on my kext?
From: Godfrey van der Linden <email@hidden>
Date: Wed, 04 Nov 2009 13:54:31 +1100
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G'day, Jim.

As Chris said the default implementation of newUserClient isn't real smart. If you want multiple interfaces automatically you could publish multiple nubs which share a single open-exclusive. But it isn't really worth the effort, overriding newUserClient is a better bet.

I've just been looking at IOService.cpp::newUserClient(). You will basically have to copy and paste it. Which is a shame, it should have a call-down to such as const OSSymbol * IOService::getUserClientClassForType(UInt32 type) (I guess I only have myself to blame there, sigh). At least the code is pretty simple.

Good luck

Godfrey

On 2009-11-04, at 6:17 , Chris Sarcone wrote:

Jim --
If I put an array in my info.plist for IOUserClientClass can I export multiple user client objects so that I can have different interfaces on my kext to support older or different word size interfaces in this way?
I don't think so. I believe IOKit will only look for one class name to use. However, you can override newUserClient() and use the 'type' parameter to instantiate different classes.
-- Chris
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References:
	>Can I export multiple user client objects on my kext? (From: Jim O'Connor <email@hidden>)
	>Re: Can I export multiple user client objects on my kext? (From: Chris Sarcone <email@hidden>)

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