Complete atomicity for Add and Replace
Complete atomicity for Add and Replace

jiangjin/go-cache,patrickmn/go-cache,robfig/go-cache,zj8487/go-cache,ggaaooppeenngg/cachemap,cognusion/go-cache-lru,yxd-hde/go-cache,pmylund/go-cache,dustin/go-cache,nothingmuch/go-cache