This is easier to use than IO.select for a single IO object
and is immune to the limitations/innefficiency of select()
on platforms where poll/ppoll is available.
This issue was solved with changeset r37785.
Eric, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.
io/wait: add IO#wait_writable method
ext/io/wait/wait.c (io_wait_writable): this is easier to use than
IO.select for a single IO object and is immune to the
limitations/innefficiency of select() on platforms where poll/ppoll
is available. patched by Eric Wong. [Feature #4646]