tree 3ee3c4f7610d40be801190b4a51267ebec112773
parent 685a508ab61e3f7cb1d922b77fe4e71f981a7d6b
author Christopher Kohlhoff <chris@kohlhoff.com> 1326283837 +1100
committer Christopher Kohlhoff <chris@kohlhoff.com> 1337675899 +1000

There is no need to call PostQueuedCompletionStatus to stop the io_service if
the outstanding work count is initially zero. A run/poll call can only be
calling GetQueuedCompletionStatus if it the count was non-zero at some point.
However, if it was previously non-zero, then the io_service will have already
been stop()-ed when the count was decremented to zero.