Processes

[ethandmd]

Tasklist: src/vm/task.rs Kernel data structure representing all current tasks as a doubly linked list. Sub lists are formed within this global list for tasks which are ready to run, waiting, running, ...

• [x] task list

Process: src/vm/process.rs A process has state, and is a kind of task. A process's state consists of:

• [x] process identifier (usize)
• [x] address space (represented as a balanced BST of things that implement dyn Resource)
• [x] trapframe (struct TrapFrame; kernel trap handler, location, pc to return to and gp regs)
• [x] process page table (vm::ptable::PageTable)
• [x] hart context regs (struct HartContext; for ctx switch)

Hart: src/hw.rs Abstraction of a riscv hart:

• [x] hart id
• [x] process
• [x] hart context regs (for ctx switch)

Process state: src/vm/process.rs Possible defined states a process can be in:

• [x] ready (can be run by cpu)
• [x] run (is running on cpu)
• [x] wait (is waiting on external resource)
• [x] sleep
• [x] dead

[ethandmd]

Stubbed in:

• src/mem.rs <-- Kernel reference counted pointer stub
• src/collection.rs <-- Kernel collection data structures (Balanced BST)