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AssigneeApple Inc.
InventorsAndrew C. Boyd, Denis J. Palmans, Peter H. van der Veen, Stephen J. McPolin, Gilberto Gemin, Stephane Couture, Joseph A. Sarlo
Estimating the term…
In an embodiment, an operating system includes a device manager that is a central repository of device information. Device drivers may communicate with the device manager over respective channels, and may request channel identifiers (Cids) to communicate with resources related to the respective devices. The device manager may provide values for resource access (or handles that the resources may use to access values). In an embodiment, the device drivers do not have the ability to allocate resources for a peripheral device. Accordingly, the security of the system may be increased. Furthermore, the resource allocation may be centrally located, simplifying the process of updating resource allocation when needed. Additionally, the device manager may delay response to requests from a given device driver until its dependencies are clear (e.g. other device drivers and hardware initializations). Thus, startup scripts may be avoided in some embodiments.
A non-transitory computer accessible storage medium storing a plurality of instructions that are computer-executable to:
A computer system comprising:
A non-transitory computer accessible storage medium storing a plurality of instructions forming a device manager that has access to a device database, wherein the device database stores data identifying a plurality of resources in a computer system that are assigned to the device, and wherein the device database further comprises data identifying dependencies between a plurality of device drivers in the system, wherein the plurality of instructions is computer-executable to:
Dependencies are inferred from the claim text.