Struct ProcessSlot 

pub struct ProcessSlot { /* private fields */ }

Represents a slot for a process in a ProcessArray.

A slot can be empty (None), or hold a reference to a Process.

The ProcessSlot type is useful for allowing slices of processes without knowing the fixed number of processes, or being templated on NUM_PROCS. That is, interfaces can use [ProcessSlot] to just use an array of process slots.

Implementations

impl ProcessSlot

pub fn set_external( &self, process: &'static dyn Process, _capability: &dyn ExternalProcessCapability, )

Install a Process into this process slot from outside the kernel crate.

The normal set() method is pub(crate) because, in production, only the kernel’s own process-loading machinery should be able to populate a process slot. However, test code and external process implementations live in separate crates and still need a way to register a process with the kernel.

set_external provides that path: it is public but requires the caller to present an ExternalProcessCapability. This capability is an unsafe-to-implement marker trait, so only explicitly trusted code (typically a test harness) can obtain it. The capability prevents arbitrary crates from silently replacing a running process.

pub fn get(&self) -> Option<&'static dyn Process>

Return the underlying process::Process if the slot contains a process.

pub fn contains_process_with_id(&self, identifier: usize) -> bool

Check if the slot contains a process with a matching process ID.

Trait Implementations

impl Clone for ProcessSlot

fn clone(&self) -> ProcessSlot

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.