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ATL CComPtr和CComQIPtr详解 - C/C++ - 清泛网移动版 - 专注C/C++及内核技术
...而CComQIPtr不但实现了CComPtr的所有的功能，而且当我们把一个不同类型的接口指针赋值给CComQIPtr的时候，CComQIPtr会自动的调用接口指针的QueryInterface接口，来获得对应的正确的接口指针。CComPtr和CComQIPtr是智能接口指针类，它们在...
ATL CComPtr和CComQIPtr详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...而CComQIPtr不但实现了CComPtr的所有的功能，而且当我们把一个不同类型的接口指针赋值给CComQIPtr的时候，CComQIPtr会自动的调用接口指针的QueryInterface接口，来获得对应的正确的接口指针。CComPtr和CComQIPtr是智能接口指针类，它们在...
libevent对比libev的基准测试 - C/C++ - 清泛网 - 专注C/C++及内核技术
...序的结果。Libevent 概述Libevent（于 2000-11-14 首次发布）是一个高性能事件循环，支持简单的 API、两 Google翻译自：http://libev.schmorp.de/bench.html
本文档简要描述了针对 libevent 和 libev 运行 libevent 基准程序的结果。
Libevent 概述
Lib...
C++中智能指针的设计和使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
...用实现技术是使用引用计数(reference count)。智能指针类将一个计数器与类指向的对象相关联，引用计数跟踪该类有多少个对象共享同一指针。每次创建类的新对象时，初始化指针并将引用计数置为1；当对象作为另一对象的副本而...
How do I prevent Android taking a screenshot when my app goes to the background?
... building has the requirement that the app has to prevent the OS to take a screenshot of the app when it's being pushed into the background for security reasons. This way it won't be able to see the last active screen when switching between apps.
...
Android, canvas: How do I clear (delete contents of) a canvas (= bitmaps), living in a surfaceView?
...nt to clear your Canvas with.
And: how can I update just a part of the screen ?
There is no such method that just update a "part of the screen" since Android OS is redrawing every pixel when updating the screen. But, when you're not clearing old drawings on your Canvas, the old drawings are st...
How to set entire application in portrait mode only?
...
For any Android version
From XML
You can specify android:screenOrientation="portrait" for each activity in your manifest.xml file. You cannot specify this option on the application tag.
From Java
Other option is to do it programmatically, for example in an Activity base class:
@...
开源邮件传输代理软件 -- Postfix 介绍 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...组成，并且在这些进程中并无特定的进程间父子关系。某一个特定的进程可以为其他进程提供特定的服务。
大多数的postfix进程由一个进程统一进行管理，该进程负责在需要的时候调用其他进程，这个管理进程就是master进程。...
Android: Align button to bottom-right of screen using FrameLayout?
...m trying to put the zoom controls of the map on the bottom right corner of screen. I could do it with RelativeLayout using both alignParentBottom="true" and alignParentRight="true" , but with Framelayout I did not find any such attributes. How do I align it to the bottom-right of screen?
...
Why is printing to stdout so slow? Can it be sped up?
...can it be that writing to physical disk is WAY faster than writing to the "screen" (presumably an all-RAM op), and is effectively as fast as simply dumping to the garbage with /dev/null?
Congratulations, you have just discovered the importance of I/O buffering. :-)
The disk appears to be faster, ...