INFORMATION PROCESSING DEVICE, PERIPHERAL DEVICE CONTROL METHOD, AND NON-TRANSITORY COMPUTER READABLE MEDIUM STORING FILTER DRIVER

摘要

In an information processing device, if the power state of a peripheral device changed by a class driver is the low-power state, in which the peripheral device consumes less power than in its normal state but its operation is limited, a filter driver below the class driver suspends controlling the peripheral device in accordance with a control request from an application program without passing through the class driver until the power state of the peripheral device returns to the normal state.

主权项

1. An information processing device comprising:
a first application program configured to transmit a control request for a peripheral device; a second application program configured to run on an operating system on which the first application program runs and to transmit a control request for the peripheral device; a class driver configured to relay the control request from the first application program; and a filter driver sitting below the class driver and configured to control the peripheral device in accordance with the control request from the first application program through the class driver and to control the peripheral device in accordance with the control request from the second application program without passing through the class driver, wherein the filter driver comprises:
a power state management unit configured to change a power state of the peripheral device in accordance with a change request of the power state of the peripheral device from the class driver and to recognize the changed power state of the peripheral device; anda control unit configured to control the peripheral device in accordance with the control request from the first application program and second application program, and if the power state of the peripheral device recognized by the power state management unit is a low-power state, the control unit suspends controlling the peripheral device in accordance with the control request from the second application program until the power state of the peripheral device returns to a normal state.