Struct PowerWakeupCountFile 

pub struct PowerWakeupCountFile;

This file allows user space to put the system into a sleep state while taking into account the concurrent arrival of wakeup events.

• Reading from it returns the current number of registered wakeup events and it blocks if some wakeup events are being processed when the file is read from.
• Writing to it will only succeed if the current number of wakeup events is equal to the written value and, if successful, will make the kernel abort a subsequent transition to a sleep state if any wakeup events are reported after the write has returned.

Implementations

impl PowerWakeupCountFile

pub fn new_node() -> impl FsNodeOps

Trait Implementations

impl BytesFileOps for PowerWakeupCountFile

fn write(&self, current_task: &CurrentTask, data: Vec<u8>) -> Result<(), Errno>

fn read(&self, current_task: &CurrentTask) -> Result<Cow<'_, [u8]>, Errno>

fn write_locked( &self, _locked: &mut Locked<FileOpsCore>, current_task: &CurrentTask, data: Vec<u8>, ) -> Result<(), Errno>

fn read_locked( &self, _locked: &mut Locked<FileOpsCore>, current_task: &CurrentTask, ) -> Result<Cow<'_, [u8]>, Errno>

fn open( &self, _locked: &mut Locked<FileOpsCore>, _file: &FileObject, _current_task: &CurrentTask, ) -> Result<(), Errno>