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golang 并發(fā)問題

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縹緲止盈 2019-04-09 20:24:45

import("fmt""runtime")/*結(jié)果：有時99有時100*/varcounter_numintconstMAXSIZE=100funcCount_num(chchanint){counter_num++ch

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TA貢獻(xiàn)2003條經(jīng)驗獲得超2個贊

packagemainimport("fmt""runtime""sync/atomic")/*結(jié)果：有時99有時100*/varcounter_numuint32=0constMAXSIZE=100funcCount_num(chchanuint32){atomic.AddUint32(&counter_num,1)ch<-counter_num}funcmain(){runtime.GOMAXPROCS(runtime.NumCPU())varchs[MAXSIZE]chanuint32fori:=0;ichs[i]=make(chanuint32)goCount_num(chs[i])}fori,ch:=rangechs{print("-----",i,"\n")print(<-ch,"\n")}fmt.Println(counter_num)}