Fix the timer thread never exits and can not deconstruct the pipe in poll. (#591)
Fix the timer thread never exits and can not deconstruct the pipe in poll. (#591)


fuchsia-mirror/third_party-mio,carllerche/mio,mneumann/mio,fuchsia-mirror/third_party-mio,carllerche/mio,mneumann/mio,murarth/mio