Class Driver & MiniDriver Definition

最新推荐文章于 2018-12-04 10:47:39 发布

原创最新推荐文章于 2018-12-04 10:47:39 发布 · 1.8k 阅读

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#class #object #system #callback #interface #include

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本文介绍了微软提供的类驱动程序与厂商编写的迷你驱动程序之间的交互方式。类驱动程序为迷你驱动程序提供了一个简单的接口，并通过函数调用完成大多数操作，而迷你驱动程序则提供了设备特定的控制。文中还详细解释了二者如何共同工作以节省系统资源。

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Class Driver and Minidriver Definitions

A Microsoft-provided class driver is an intermediate driver designed to provide a simple interface between a vendor-written minidriver and the operating system. A minidriver is a hardware-specific DLL that uses a Microsoft-provided class driver to accomplish most actions through function calls, and provides only device-specific controls.minidriver is composited by callback functions.

Under WDM, the minidriver registers its associated hardware adapters with the class driver, and the class driver creates a file object to represent each adapter that registers. The minidriver uses the class driver's device object to make system calls. The class driver is accessed by user-mode clients through WDM Streaming.

The interactions between class driver and minidriver include:

The minidriver does not create a device object, but shares the class driver's device object as necessary. This saves system resources.
Only one device object is created per adapter. Multiple subdevices (called streams) supported by the adapter are represented by WDM Streaming pins.

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