twizzler_driver/device/
children.rs

1use twizzler::object::ObjID;
2use twizzler_abi::kso::{KactionCmd, KactionFlags, KactionGenericCmd};
3
4use super::Device;
5
6/// An iterator over the children of a device.
7pub struct DeviceChildrenIterator {
8    pub(crate) id: ObjID,
9    pub(crate) pos: u16,
10}
11
12impl Iterator for DeviceChildrenIterator {
13    type Item = Device;
14    fn next(&mut self) -> Option<Self::Item> {
15        let cmd = KactionCmd::Generic(KactionGenericCmd::GetChild(self.pos));
16        let result =
17            twizzler_abi::syscall::sys_kaction(cmd, Some(self.id), 0, 0, KactionFlags::empty())
18                .ok()?;
19        self.pos += 1;
20        result.objid().map(|id| Device::new(id).ok()).flatten()
21    }
22}
23
24impl Device {
25    /// Get an iterator over the children of this device.
26    pub fn children(&self) -> DeviceChildrenIterator {
27        DeviceChildrenIterator {
28            id: self.obj.id(),
29            pos: 0,
30        }
31    }
32}
twizzler_driver/device/children.rs

twizzler_driver/device/
children.rs
