re: 易中天品三國之“藐視”J2EE binge 2006-09-11 09:58
易老師不是說了嗎?搞學問的就需要求甚解.
我們算是搞學問的吧
我也遇到了奇怪的問題,我配置的log一句話也不出來,log文件倒是建立了
如果樓上有解,能否給我點提示lazbean at hotmail dot com
@crazycy
nono,文章寫到:
The issue of the failure of double-checked locking is not due to implementation bugs in JVMs but to the current Java platform memory model. The memory model allows what is known as "out-of-order writes" and is a prime reason why this idiom fails.
文章中說,基于java的內存模型,DCL并不是最安全的.最安全的是餓漢 和懶漢.
當然,懶漢很影響效率.