Developing Drivers with the Windows® Driver Foundation

UMDF Object Model Implementation

In UMDF, the framework maintains a set of framework objects, and the driver creates a callback object that corresponds to each framework object for which the driver requires an event callback. The callback objects expose callback interfaces that are defined by the framework.

UMDF drivers use the following types of objects:

Driver-created file	I/O completion parameters
Base object	I/O target
Driver	Memory
Device	USB device
File	USB I/O target
I/O request	USB interface
I/O queue

UMDF objects and interfaces are based on the COM programming pattern. UMDF uses only the query-interface and reference-counting features of COM; it does not depend on the entire COM infrastructure and runtime library.

Chapter 18 provides information ...