Unisys Corporation

William O Pollnow

Allyn D Smith

Steven R Hallquist

James R Heit

Murray D Wilke

Dennis Stroik

Thomas G Kipp

Paul A Fraser

Systems and methods for improving the handing of communications between network applications in a computer system with connectivity services interfaces that seamlessly handle the communications in an easy-to-use, secure, message-oriented environment are disclosed. Embodiments of systems and methods for maintaining ownership of sessions by applications, and for avoiding the orphaning of communication sessions when activities are terminated are also disclosed. Also disclosed are embodiments of systems and methods for accessing data using authentication credentials different than the authentication credentials associated with a user that is requesting access to the data. Embodiments of systems and methods for authenticating credentials for establishing a secure communication connection between applications executing on different platforms are also disclosed.

Systems and methods for maintaining ownership of and avoiding orphaning of communication sessions

A traceroute command may be used to diagnose a computer network or provide additional information regarding a computer network. A traceroute command may be provided to applications executing within a virtualized environment by allowing commands to be passed from the virtualized environment to a host operating system through a network interface. The traceroute command may be executed by the host operating system, and network information returned to the application in the virtualized environment.

Trace route command execution from a virtualized environment

Systems and methods for handling communications between network applications

A method and apparatus for managing heap memory for an application program in a data processing system. The system supports a basic addressing mode and an extended addressing mode. Programs operating in the basic addressing mode are limited to addressing using a first number of bits, program operating in the extended addressing mode are limited to addressing using a second number of bits, and the first number of bits is less than the second number of bits. One or more heap banks are established for an application program, with each heap bank having a quantity of memory space that is addressable by the program operating in basic addressing mode. The heap banks are managed by a system program operating in extended addressing mode. In response to each request from the application program that requires a quantity of memory space, one of the heap banks is selected for allocating the memory. An additional heap bank is established if none of the heap banks has a quantity of available memory space that satisfies the required quantity.

Management of memory heap space for data files accessible to programs operating in different addressing modes

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Roseville, MN, United States of America

William O Pollnow