Qinna: a component-based framework for runtime safe resource adaptation of embedded systems.

Even if hardware improvements have increased the performance of embedded systems in the last years, resource problems are still acute. The persisting problem is the constantly growing complexity of systems, which increase the need for reusable developement framework and pieces of code. In the case of PDAs and smartphones, in addition to classical needs (safety, security), developers must deal with quality of service (QoS) constraints, such as resource management. Qinna was designed to face with these problems. In this paper, we propose a complete framework to express ressource constraints during the developpement process. We propose a component-based architecture, which generic components and algorithms, and a developpement methodology, to manage QoS issues while developing an embedded software. The obtained software is then able to automatically adapt its behaviour to the physical resources, thanks to \g{degraded modes}. We illustrate the methodology and the use of Qinna within a case study.