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OK this is from kqueue man page:
"kevent() returns the number of events placed in the eventlist, up to
the value given by nevents"
What I find confusing is that kevent() returns int data type, however
the length of eventlist given by nevents can be up to size_t.
Suppose you have more than INT_MAX events in kqueue, what are the
semantics of kevent()?
1. kevent() returns up to INT_MAX events, and advances internal pointer
to the next segment of up to INT_MAX events.
2. kevent() overflows int and returns a negative number.
This also begs another question: is there some sort of internal limit
on the total number of events supported by kqueue, or it can be as big
as your RAM allows?
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