Struct SystemState 

pub struct SystemState {
    pub now: Option<Instant>,
    pub times: Times,
    pub executor: Option<Rc<dyn Executor>>,
    pub processes: BTreeMap<Pid, Process>,
    pub foreground: Option<Pid>,
    pub file_system: FileSystem,
    pub home_dirs: HashMap<String, PathBuf>,
    pub path: UnixString,
}

State of the virtual system.

Fields

now: Option<Instant>

Current time

times: Times

Consumed CPU time

executor: Option<Rc<dyn Executor>>

Task manager that can execute asynchronous tasks

The virtual system uses this executor to run (virtual) child processes. If executor is None, VirtualSystem::new_child_process will fail.

processes: BTreeMap<Pid, Process>

Processes running in the system

foreground: Option<Pid>

Process group ID of the foreground process group

Note: The current implementation does not support the notion of controlling terminals and sessions. This item may be replaced with a more correct implementation in the future.

file_system: FileSystem

Collection of files existing in the virtual system

home_dirs: HashMap<String, PathBuf>

Map from user names to their home directory paths

VirtualSystem::getpwnam_dir looks up its argument in this dictionary.

path: UnixString

Standard path returned by VirtualSystem::confstr_path

Implementations

impl SystemState

pub fn select_all(this: &RefCell<Self>)

Performs select on all processes in the system.

Any errors are ignored.

The RefCell must not have been borrowed, or this function will panic with a double borrow.

Trait Implementations

impl Clone for SystemState

fn clone(&self) -> SystemState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SystemState

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for SystemState

fn default() -> SystemState

Returns the “default value” for a type.