Fix thread not joined#1080

Merged

BillyONeal merged 3 commits intomicrosoft:masterfrom

whoan:fix-unhandled-exception

Mar 26, 2019

Commits on Mar 25, 2019

Add locks to guarantee asio io_service thread is joined
whoan
committed

Commits on Mar 26, 2019

Merge remote-tracking branch 'origin/master' into fix-unhandled-exception
BillyONeal
committed
Use lock_guard instead of unique_lock and add unlock comments.
BillyONeal
committed