refactor thread_manager.h
refactor thread_manager.h

vittvolt/15721-peloton,AllisonWang/peloton,yingjunwu/peloton,prashasthip/peloton,eric-haibin-lin/peloton-1,cmu-db/peloton,AngLi-Leon/peloton,vittvolt/peloton,wangziqi2016/peloton,AllisonWang/peloton,apavlo/peloton,eric-haibin-lin/peloton-1,eric-haibin-lin/peloton-1,apavlo/peloton,seojungmin/peloton,jessesleeping/iso_peloton,apavlo/peloton,prashasthip/peloton,apavlo/peloton,vittvolt/peloton,haojin2/peloton,cmu-db/peloton,haojin2/peloton,cmu-db/peloton,AngLi-Leon/peloton,malin1993ml/peloton,yingjunwu/peloton,vittvolt/15721-peloton,seojungmin/peloton,PauloAmora/peloton,wangziqi2016/peloton,wangziqi2016/peloton,phisiart/peloton-p3,jessesleeping/iso_peloton,seojungmin/peloton,haojin2/peloton,prashasthip/peloton,vittvolt/15721-peloton,ShuxinLin/peloton,vittvolt/15721-peloton,seojungmin/peloton,phisiart/peloton-p3,prashasthip/peloton,jessesleeping/iso_peloton,AngLi-Leon/peloton,yingjunwu/peloton,cmu-db/peloton,vittvolt/peloton,PauloAmora/peloton,wangziqi2016/peloton,wangziqi2016/peloton,cmu-db/peloton,malin1993ml/peloton,seojungmin/peloton,AllisonWang/peloton,vittvolt/peloton,vittvolt/15721-peloton,malin1993ml/peloton,AllisonWang/peloton,seojungmin/peloton,eric-haibin-lin/peloton-1,phisiart/peloton-p3,PauloAmora/peloton,ShuxinLin/peloton,malin1993ml/peloton,phisiart/peloton-p3,ShuxinLin/peloton,malin1993ml/peloton,ShuxinLin/peloton,AllisonWang/peloton,eric-haibin-lin/peloton-1,prashasthip/peloton,phisiart/peloton-p3,jessesleeping/iso_peloton,cmu-db/peloton,vittvolt/15721-peloton,phisiart/peloton-p3,eric-haibin-lin/peloton-1,apavlo/peloton,AllisonWang/peloton,AngLi-Leon/peloton,haojin2/peloton,haojin2/peloton,vittvolt/peloton,ShuxinLin/peloton,prashasthip/peloton,apavlo/peloton,yingjunwu/peloton,ShuxinLin/peloton,PauloAmora/peloton,AngLi-Leon/peloton,jessesleeping/iso_peloton,jessesleeping/iso_peloton,yingjunwu/peloton,vittvolt/peloton,haojin2/peloton,PauloAmora/peloton,AngLi-Leon/peloton,malin1993ml/peloton,PauloAmora/peloton,jessesleeping/iso_peloton,yingjunwu/peloton,wangziqi2016/peloton