Struct Reaper 

pub(crate) struct Reaper {
    pub(crate) sys: Reaper,
    pub(crate) drivers: AtomicUsize,
    pub(crate) child_count: AtomicUsize,
}

The zombie process reaper.

This structure reaps zombie processes and emits the SIGCHLD signal.

Fields

sys: Reaper

Underlying system reaper.

drivers: AtomicUsize

The number of tasks polling the SIGCHLD event.

If this is zero, the async-process thread must be spawned.

child_count: AtomicUsize

Number of live Child instances currently running.

This is used to prevent the reaper thread from being spawned right as the program closes, when the reaper thread isn’t needed. This represents the number of active processes.

Implementations

impl Reaper

pub(crate) fn get() -> &'static Self

Get the singleton instance of the reaper.

pub(crate) fn ensure_driven(&'static self)

Ensure that the reaper is driven.

If there are no active driver() callers, this will spawn the async-process thread.

pub(crate) fn start_driver_thread(&'static self)

Start the async-process thread.

pub(crate) fn register(&'static self, child: Child) -> Result<ChildGuard>

Register a process with this reaper.