X Window研究笔记(21)
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21.X Window 字符串与Atom
Atom是X Window中的一大特色,不把它弄清楚,可能会对阅读其它代码形成障碍。X Window把常用的字串用一个hash表来管理,并给这些字符串赋与一个ID,客户端通过ID引用字符串,避免在客户端和服务器端之间来回传递这些它们,这样可以大大提高传输效率。另外Atom是一个整数,对整数的比较也比对字符串的比较有更快的速度。管理Atom的主要函数有:
![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif)
![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif)
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![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockStart.gif)
![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif)
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![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockStart.gif)
![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif)
![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif)
![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif)
![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif)
![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif)
![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif)
![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif)
![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockEnd.gif)
![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif)
(待续)