I'm writing an extension for Mac OS X using the CoreMIDI library. I can send MIDI data into DrRacket by registering a callback. In my callback I need to allocate memory with malloc. I have written the code in XCode to verify that it works. When I compile with 3m for DrRacket it crashes DrRacket when it is used. Any ideas?? CoreMIDI assigns a high priority thread to handle the processing. It is definitely the malloc line that breaks. When I remove it, the extension works. Of course I need the malloc line for the data to be correct. Any help will be greatly appreciated. Thank you -Justin
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