Struct FreezerController

pub struct FreezerController { /* private fields */ }

A controller that allows controlling the freezer subsystem of a Cgroup.

In essence, this subsystem allows the user to freeze and thaw (== “un-freeze”) the processes in the control group. This is done transparently so that neither the parent, nor the children of the processes can observe the freeze.

Note that if the control group is currently in the Frozen or Freezing state, then no processes can be added to it.

Implementations

impl FreezerController

pub fn new(root: PathBuf, v2: bool) -> Self

Contructs a new FreezerController with root serving as the root of the control group.

pub fn freeze(&self) -> Result<()>

Freezes the processes in the control group.

pub fn thaw(&self) -> Result<()>

Thaws, that is, unfreezes the processes in the control group.

pub fn state(&self) -> Result<FreezerState>

Retrieve the state of processes in the control group.

Trait Implementations

impl Clone for FreezerController

fn clone(&self) -> FreezerController

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FreezerController

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

Formats the value using the given formatter.

impl<'a> From<&'a Subsystem> for &'a FreezerController

fn from(sub: &'a Subsystem) -> &'a FreezerController

Converts to this type from the input type.