Change to priority queue of pointers to Callback objects #40
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This fixes #39. It uses
shared_ptr
s to ensure that the objects get cleaned up without much fuss.I've tested it on my Mac, and with
RDassertthread
andRDsan
from the r-debug Docker image, and I no longer see any errors. Previously, it would usually give weird errors and crash on Mac, and withRDassertthread
, it would error out every time with a failed thread assertion.I added a NEWS item to 0.7 -- if it's too late for 0.7, I can move it to a new section.