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Re: Callbacks from IOKit

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Re: Callbacks from IOKit

Subject: Re: Callbacks from IOKit
From: Florent Pillet <email@hidden>
Date: Tue, 22 Apr 2008 12:53:03 +0200

Rick Mann wrote:

I'm doing some stuff with USB, and the example code I'm using uses IOServiceAddMatchingNotification() to add a pointer to a C callback to get notified when things happen on the USB bus.

In C++, one typically uses the refcon parameter in these APIs to pass a pointer to the C++ object responsible for handling the callback, and a pointer to a static C++ member function that massages the call into a method dispatch.

You will do the same in Cocoa, and in your callback function, use the refcon as your object id and call a method of your object.

Just make sure that the object in question is not autoreleased, otherwise you'll have some weird and difficult to debug issues.

Florent
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  >Callbacks from IOKit (From: Rick Mann <email@hidden>)




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