LongAdder，AtomicIntegerFieldUpdater深入研究

从LongAdder看更高效的无锁实现

AtomicIntegerFieldUpdater字段原子更新类

div:not([id]){display:none;}
-->


ul{padding:0!important;margin:0!important;}#sp-ac-container ul#sp-ac-a_useiframe-extend{padding-left:40px!important;}#sp-ac-rect{position:relative!important;top:0!important;left:0!important;float:right!important;height:10px!important;width:10px!important;padding:0!important;margin:0!important;-moz-border-radius:3px!important;border-radius:3px!important;border:1px solid white!important;-webkit-box-shadow:inset 0 5px 0 rgba(255,255,255,0.3),0 0 3px rgba(0,0,0,0.8)!important;-moz-box-shadow:inset 0 5px 0 rgba(255,255,255,0.3),0 0 3px rgba(0,0,0,0.8)!important;box-shadow:inset 0 5px 0 rgba(255,255,255,0.3),0 0 3px rgba(0,0,0,0.8)!important;opacity:0.8!important;}#sp-ac-dot,#sp-ac-cur-mode{position:absolute!important;z-index:9999!important;width:5px!important;height:5px!important;padding:0!important;-moz-border-radius:3px!important;border-radius:3px!important;border:1px solid white!important;opacity:1!important;-webkit-box-shadow:inset 0 -2px 1px rgba(0,0,0,0.3),inset 0 2px 1px rgba(255,255,255,0.3),0px 1px 2px rgba(0,0,0,0.9)!important;-moz-box-shadow:inset 0 -2px 1px rgba(0,0,0,0.3),inset 0 2px 1px rgba(255,255,255,0.3),0px 1px 2px rgba(0,0,0,0.9)!important;box-shadow:inset 0 -2px 1px rgba(0,0,0,0.3),inset 0 2px 1px rgba(255,255,255,0.3),0px 1px 2px rgba(0,0,0,0.9)!important;}#sp-ac-dot{right:-3px!important;top:-3px!important;}#sp-ac-cur-mode{left:-3px!important;top:-3px!important;width:6px!important;height:6px!important;}#sp-ac-content{padding:0!important;margin:5px 5px 0 0!important;-moz-border-radius:3px!important;border-radius:3px!important;border:1px solid #A0A0A0!important;-webkit-box-shadow:-2px 2px 5px rgba(0,0,0,0.3)!important;-moz-box-shadow:-2px 2px 5px rgba(0,0,0,0.3)!important;box-shadow:-2px 2px 5px rgba(0,0,0,0.3)!important;}#sp-ac-main{padding:5px!important;border:1px solid white!important;-moz-border-radius:3px!important;border-radius:3px!important;background-color:#F2F2F7!important;background:-moz-linear-gradient(top,#FCFCFC,#F2F2F7 100%)!important;background:-webkit-gradient(linear,0 0,0 100%,from(#FCFCFC),to(#F2F2F7))!important;}#sp-ac-foot{position:relative!important;left:0!important;right:0!important;min-height:20px!important;}#sp-ac-savebutton{position:absolute!important;top:0!important;right:2px!important;}#sp-ac-container .sp-ac-spanbutton{border:1px solid #ccc!important;-moz-border-radius:3px!important;border-radius:3px!important;padding:2px 3px!important;cursor:pointer!important;background-color:#F9F9F9!important;-webkit-box-shadow:inset 0 10px 5px white!important;-moz-box-shadow:inset 0 10px 5px white!important;box-shadow:inset 0 10px 5px white!important;}label[class="newFunc"]{color:blue !important;}
-->