转载:http://blog.csdn.net/swingboard/article/details/27207497   So today let’s talk about devm functions as that is what I have been upto the past couple of weeks. Yes, should have finished the task by now but due to some reasons was not active a coupl…

Process cube的时候遇到如下错误.   Errors in the high-level relational engine. The following exception occurred while the managed IDbConnection interface was being used: Login failed for user xxx 解决这个问题的步骤:(reset impression mode) Note:  to set to the impersona…

interface Go语言里面设计最精妙的应该算interface,它让面向对象,内容组织实现非常的方便,当你看完这一章,你就会被interface的巧妙设计所折服. 什么是interface 简单的说,interface是一组method签名的组合,我们通过interface来定义对象的一组行为. 我们前面一章最后一个例子中Student和Employee都能SayHi,虽然他们的内部实现不一样,但是那不重要,重要的是他们都能say hi 让我们来继续做更多的扩展,Student和Emplo…

interface Go语言里面设计最精妙的应该算interface,它让面向对象,内容组织实现非常的方便,当你看完这一章,你就会被interface的巧妙设计所折服. 什么是interface 简单的说,interface是一组method签名的组合,我们通过interface来定义对象的一组行为. 我们前面一章最后一个例子中Student和Employee都能SayHi,虽然他们的内部实现不一样,但是那不重要,重要的是他们都能say hi 让我们来继续做更多的扩展,Student和Emplo…

Onece a class implementation a particular interface, you can interact with the members of the interface through any instance of that class. Cow bossie = ); // Cow implements IMoo, which includes Moo method bossie.Moo(); You can also declare a variabl…

abstract修饰符可以修饰类和方法. (1)abstract修饰类,会使这个类成为一个抽象类,这个类将不能生成对象实例,但可以做为对象变量声明的类型(见后面实例),也就是编译时类型.抽象类就相当于一类的半成品,需要子类继承并覆盖其中的抽象方法. (2)abstract修饰方法,会使这个方法变成抽象方法,也就是只有声明而没有实现,需要子类继承实现. (3)注意的地方: A:有抽象方法的类一定是抽象类.但是抽象类中不一定都是抽象方法,也可以全是具体方法.abstract修饰符在修饰类时必须放在类…

我们知道在Java中的继承都是单继承的,就是说一个父类可以被多个子类继承但是一个子类只能有一个父类.但是一个接口可以被不同实现类去实现,这就是我们说的Java中的多态的概念.下面我们再来说一下接口的多继承的概念,就是说一个接口是可以继承多个接口的. 下面是我们公司自己开发的ORM框架,就用到了接口的多继承的概念. @MybatisRepository public interface BaseQueryDao<T> extends IBaseQueryDao<T>, Dynamic…

https://en.wikipedia.org/wiki/Single_document_interface https://msdn.microsoft.com/en-us/library/b2kye6c4.aspx SDI applications allow only one open document frame window at a time. It's made up of one or more independent windows, which appears separa…

Move resources allocated using unmanaged interface to managed devm interface So today let's talk about devm functions as that is what I have been upto the past couple of weeks. Yes, should have finished the task by now but due to some reasons was not…

前言 devm是内核提供的基础机制,用于方便驱动开发者所分配资源的自动回收.参考内核文档devres.txt.总的来说,就是驱动开发者只需要调用这类接口分配期望的资源,不用关心释放问题.这些资源的释放会在device对象销毁时自动释放. devres使用 不同的内核模块提供了对应的devm_xxx接口,如下(不仅仅这些): MEM devm_kmalloc() devm_kzalloc() devm_kcalloc() devm_kmalloc_array() devm_kstrdup() de…