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Introduction to the new model

A project log for NPM - New Programming Model

NPM defines a programming model for new languages and "application processors", that emphasises safety, security and modularity.

Yann Guidon / YGDESYann Guidon / YGDES 05/30/2020 at 18:590 Comments

In the previous log (3. The cellular allegory), we find that there is some degree of similarity between eukaryote cells and the model I'm describing in this project.

Differences are :

I will now try to describe the elements of the programming model :


The rights

are properties and/or credentials that enable or inhibit access to a critical resource, such as

There is one rule here, inspired by other OSes : it is only possible to drop/lose rights ! Otherwise, any program could get access to resources it shouldn't, by mistake and/or malevolently. So the whole system is designed in a "top-down" fashion where a first/initial program starts with all the possible rights, dispatches them to other sub-programs, with each of them having only the minimum required rights to perform their job.

Surrogate programs can serve as gatekeepers : they perform the I/O taks for example while filtering data and enforcing protocols. They have their own filters for who can use which provided service. This allows dynamic, fine-grained access to necessary features, and even cascading "server programs" while keeping the system "flat" (no "privileged program" because no program has all the rights).


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