[Libcdio-devel] Fixed disc eject support on OS X

[Robert Kausch]

Hi all,

just had a closer look at the issues I had with ejecting discs using 
libcdio on OS X.

To eject, we scheduled the DADiskUnmount and DADiskEject commands and 
then ran CFRunLoopRunInMode(kCFRunLoopDefaultMode, 30.0, TRUE); to 
execute. This runs the current runloop until a connected source gets 
signaled or it times out. The catch is that it stops on _any_ connected 
source getting signaled which works fine for command line applications 
where usually only our own source (dacontext.canceled) is attached to 
the runloop. However, in Cocoa applications many other sources may be 
connected to the same runloop and fire signals all the time. The 
solution is to run that call in a loop until our source got signaled or 
it timed out.

Another issue was in using kDADiskUnmountOptionDefault when unmounting. 
This unmounted only the audio part when dealing with CD-Extra discs; the 
data session stayed mounted and prevented the disc ejection. I changed 
it to kDADiskUnmountOptionWhole to remedy.

Robert
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Robert Kausch
address@hidden