Abstract

We describe the support to object management of the distributed object-oriented operating system SOS. We discuss the integration of object migration and storage into C++ programs, a language not designed for that purpose. The necessary support is split between the compiler and a run-time object management system. Migration and storage preserve the type and structure of the objects, which may be user-defined and arbitrarily complex. Our mechanisms are simple, generic, and require little programmer intervention. The key elements are dynamic classes, a generalized pointer type which allows to efficiently refer to an object, pre-requisite objects, and a mechanism for object re-initialization. Keywords: persistence, migration, dynamic linking, dynamic type-checking, C++, object-oriented operating system, SOS 1 INTRODUCTION We present some aspects of the object management support in the SOS operating system [Sha86a]. SOS is a research program to build a distributed operating system, where ...

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