US 7,127,723 B2Granted

Information processing apparatus with multiple operating systems

AssigneesHitachi, Ltd., Xanavi Informatics Corporation

InventorsYoshinori Endo, Mariko Okude, Hideo Hiroshige, Kozo Nakamura, Yukihiro Kawamata, Kimiya Yamaashi

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Abstract

An information processing apparatus wherein a plurality of operating systems operate on a single processor and a framework (shared object) enabling reliable and quick sharing of correct information between the plurality of operating systems is provided. The apparatus has a function the plurality of operating systems can create, register and refer to the shared object which provides an interface for registration and reference of information. The shared object is operated so that, while one of the operating systems is registering information or referring thereto, the other operating system is inhibited from registering the information and referring thereto. When one operating system finished the registration or reference of the information, one operating system informs the other operating system of the fact.

Claims13

Dependent claims

An information processing apparatus having a plurality of operating systems mounted therein and has an OS switching function of switchingly operating the plurality of operating systems, said apparatus having a sharing function that an application program of one of the plurality of operating systems can refer to shared information registered by an application program of the other operating system in a memory resource capable of being referred to by said plurality of operating systems and an inter-OS communication function, which transfers messages among said plurality of operating systems,

wherein said sharing function provides an interface for registration of the shared information in said memory resource by the application programs of said plurality of operating systems and an interface for reference of the shared information registered in said memory resource by the application programs of the plurality of operating systems, and
wherein said sharing function acts to inhibit the application program operating on one operating system from registering the shared information in said memory resource or referring thereto while the application program operating on the other operating system is registering the shared information in said memory resource or is referring thereto, and wherein said inter-OS communication function, when said memory resource is accessed by the application program operating on said one operating system, notifies the application program operating on the other operating system registered to the memory resource that the shared information is registered or referred thereto.

wherein said sharing function provides an interface for registration of the shared information in said memory resource by the application programs of said plurality of operating systems and an interface for reference of the shared information registered in said memory resource by the application programs of the plurality of operating systems, and
wherein said inter-OS communication function, by way of said sharing function acts, when the application program of one operating system registers or refers to the shared information in said memory resource, to inform the application program operating on the other operating system of the fact that the shared information was registered in shared memory resource or was referred thereto.

Dependencies are inferred from the claim text.