Hi Mark, thank you for getting back to me! Did you want to look at this sketch? prop.cpp (3.8 KB)
Basically it creates a custom dapl, then registers it with H5P_DATASET_ACCESS class. Verifies if property present – so far everything checks out; then opens a dataset, and checks if the dapl retrieved from dset id has the same property set: (no) .
In my understanding once the property registered, the call backs provided should be invoked at some point. Probably I am doing it wrong, just can’t seem to find why, and how. Also tried to register an entire class, similar result. In fact I spent some time on this in January, when I worked on a custom pipeline with BLAS level 3 like blocking. – and possibly multi threaded compression. Didn’t find solution, then I forgot about it until you mentioned the technique.
best: steve