US 8,019,915 B2Granted

Method and device for controlling access to multiple applications

AssigneeTIXEL GmbH

InventorsLars Eric Fuerst, Ralf Einhom, Carsten Herpel, Ralf Koehler

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Abstract

The invention relates to a method and a device for controlling access to multiple applications which are each implemented as a client application in an operating system environment of a data processing device from a shared memory system. The problem addressed by the invention is that of providing an improved method and an improved device for controlling access to multiple applications which are each implemented as a client application in an operating system environment of a data processing device from a shared memory system, which allow an efficient exchange of data for input/output. In particular, interaction with multimedia data in such an operating environment should be optimized. The invention comprises the details of a method for controlling access to multiple applications which are each implemented as a client application in an operating system environment of a data processing device from a shared memory system which is constructed in the form of multiple memory blocks in the operating system environment, which are each assigned to one of the client applications.

Claims13

Dependent claims

A method for controlling an access by a plurality of applications, which are respectively implemented as an application client in an operating system environment of a data processing device, to a shared storage system which is mapped in the operating system environment in the form of a plurality of storage blocks which are respectively associated with one of the application clients, the method including:

each storage block being assigned a local I/O access controller which is configured to block or allow access by the associated application client to the storage block,
local I/O access controllers which are respectively associated with the same application client being assigned to a local client for flow control which is configured to put the local I/O access controllers which are associated with the same application client into an “access permitted” state or an “access blocked” state together,
the operating system environment having a global I/O access controller formed in it which is configured to transmit control information to the local clients for flow control, and
an I/O access operation by the application clients to one or more of the storage blocks in the shared storage system being regulated globally in line with a temporal flow pattern by virtue of the local clients for flow control putting the local I/O access controllers which are associated with the same application client into the “access permitted” state or the “access blocked” state together in line with the control information which is received by the local clients for flow control from the global I/O access controller.

1 more element

An apparatus for controlling an access by a plurality of applications, which are respectively implemented as an application client in an operating system environment for a data processing device, to a shared storage system which is mapped in the operating system environment in the form of a plurality of storage blocks which are respectively associated with one of the application clients, wherein the apparatus has:

local I/O access controllers formed which are respectively associated with a storage block, wherein the local I/O access controllers are configured to block or allow access by the associated application client to the storage block,
local clients for flow control formed which respectively have associated local I/O access controllers for the same application client, wherein the local clients for flow control are configured to put the local I/O access controllers which are associated with the same application client into an “access permitted” state or an “access blocked” state together,
a global I/O access controller formed in the operating system environment, said global I/O access controller being configured to transmit control information to the local clients for flow control, and
an I/O access operation by the application clients to one or more storage blocks, which are respectively associated with the application clients in the shared storage system regulated globally in line with a temporal flow pattern by virtue of the local clients for flow control putting the local I/O access controllers which are associated with the same application client into the “access permitted” state or the “access blocked” state together in line with the control information which is received by the local clients for flow control from the global I/O access controller.

1 more element

Dependencies are inferred from the claim text.