C H A P T E R 5
Interacting with Drivers from Applications
In the previous chapter, we learnt about I/O Kit drivers, which live in the kernel. On the other hand, the applications that users interact with live in user space. So, if the user is going to use the services provided by your driver, the kernel/user space boundary needs to be crossed.
Mac OS X provides several different mechanisms through which a driver can provide its services to user space applications. The method that a developer chooses to allow a particular driver to provide its services to user space applications is dependent on the type of functionality that the driver implements. For example, all serial ports, audio drivers, and storage devices have their own interface that ...
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