Cross-posted to Mathematica.SE

The following is from the comparison between WSTP (MathLink) and LibraryLink in the documentation:

When the Wolfram Language is waiting for a WSTP application to return a result, it can be used to service preemptive computations such as those needed for user interface operations. When a library function is running this will not happen without effort by the author of the library.

^{(Emphasis by me.)}

What do I need to do to allow for preemptive computations to be serviced while running LibraryLink functions?

Is there a function similar to libData->AbortQ() that I need to call from time to time? AbortQ() itself won't allow for this (I already checked). I did not find anything promising in WolframLibrary.h, but the documentation suggests that there should be a way.