Patent ID: 11899775
Assignee: APPLE INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 18:
19. The computer system as recited in claim 18 wherein the operations further comprise:
receiving a second request from the first device driver for a resource allocated to the at least one device;
accessing the device database by the device manager to locate the resource; and
respond to the request by the device manager with a handle to the resource, wherein the handle is opaque to the first device driver and thereby prevents the first device driver from accessing the resource directly, wherein the first device driver is configured to transmit the handle to a controller for the resource, and wherein the controller is configured to transmit the handle to the device manager to obtain a resource value, restricting the first device driver to the provided resource and preventing the first device driver from allocating the resource to the device.