CXCodeCompleteResults and threads

Hey there,

I know that I can call clang_codeCompleteAt from threads as long as I ensure
no other thread is doing anything with the TU. But can I use the returned
results from another thread in a read-only manner without caring about locks?

Or are the CXCompletionString's mapped into the TU for sharing somehow (cmp.
CXTranslationUnit_CacheCompletionResults) such that I cannot convert safely
access the clang_getCompletion* functions?

Put differently, is this safe:

- parse TU
- get completion results

in parallel:
- calling clang_getCompletio* on completion results while the corresponding TU
potentially is reparsed/deleted/... as long as I didn't call

Thanks, bye