International Business Machines Corporation

Wolfgang Fischer

Stephan Feger

Ludwig Fischer

Dieter Sonnentag

Tayssir Scheib

Walter Hinz

Wolfgang Guber

Harmut Droege

Bernd Nerz

Simon Weishaupt

Hartmut Droege

Heinz G Horbach

Fritz W Hilpert

Klaus Staudenmaier

Ulrich Hengstler

Klaus Werse

Wilfried Bruegmann

Manfred Krautwald

Norbert Koller

Jan Barthel

D Walter Hinz

Dirk Willuhn

Berthold Gerber

Stephan 'Feger

Harald F Jonas

An approach for providing exclusive access to a resource shared by a plurality of processes in a computer system. The approach includes a computer processor retrieving a process identifier for a first process attempting to access the resource, where the process identifier is uniquely assigned to each process of the plurality of processes requiring the resource with the computer system. The approach includes the computer processor using the process identifier for the first process and a mutual exclusion object that includes a lock position allowing exclusive access to the resource and a wait position for a next process to attain the lock position to provide exclusive access to the resource.

Self-managed lock access

A data processing system is provided for emulating keyboard input. In one embodiment, the invention provides a contact sensitive graphical data input-output field for receiving graphical user input and for displaying graphical output. The graphical data input-output field includes multiple contact sensitive data input fields. The embodiment also provides a keyboard overlying the graphical data input-output field. The keyboard includes multiple keys, each of which corresponds to a data input field of the graphical data input-output field. Each key, when pressed by a user, contacts the data input field that corresponds to that key, thereby causing the data processing system to provide an electrical signal of a predetermined value that corresponds to the key pressed by the user. The keyboard further includes a window through which at least a portion of the graphical data input-output field can be viewed when the keyboard is fully overlying the graphical data input-output field, wherein the portion of said graphical data input-output field that can be viewed through the window can display graphical output.

Growing community of inventors

Boeblingen, Germany

Wolfgang Fischer