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Cut down on unnecessary imports of IO::Handle and
method lookup + dispatch overhead.
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It's slightly easier to test on a machine without Test::More
and I'm hand-rolling my own is() and ok() subs.
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Consistently returning the equivalent of pollfd.revents in a
portable manner was never worth the effort for us, as we use the
same ->event_step callback regardless of POLLIN/POLLOUT/POLLHUP.
Being a Perl, @events knows it size and we don't have to return
a maximum index for the caller to iterate on.
We can also avoid redundant integer coercion ("+0") since we
ensure everything is an IV in other places.
Finally, vec() is preferable to ("\0" x $size) for resizing
buffers because it only needs to write the extended portion
and not overwrite the entire buffer.
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epoll_wait_mod8 places a dummy element into the [2] slot of the
nested array, which caused is_deeply to fail.
Tested on aarch64.
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The x32 ABI allows users to take advantage of the extra
registers on x86-64 without the bloat of 64-bit pointers and
longs.
This ought to be significant since Perl was designed when 32-bit
was prevalent; and the common structs for ops, hashes, scalars,
and arrays use longs (SSize_t/Size_t) for things which should
never need 64-bits when processing emails.
Debian's x32 port seems to work quite nicely under a chroot
on an amd64 Linux system. All tests pass under x32, now.
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