Struct agilulf_fs::File

pub struct File { /* fields omitted */ }

A struct contains only one fd.

As the constant style of Linux system call, aio accepts fd. And I cannot get a fd from std::fs::File.

pub struct File {
   fd: RawFd,
}

WARNING

1. This struct will close the fd automatically when it's dropped.

2. Open file with this struct will take over the SIGIO signal. AIO will send a SIGIO signal with request id to this process and then this library will lookup WAKER_LIST and find the waker corresponding to this id. Then it will wake that task.

Methods

impl File

pub fn open(path: &str) -> Result<Self>

Open file from given path.

The oflag in this function is set as O_RDWR | O_CREAT. And the mode is set as S_IRUSR|S_IWUSR. While opening the first file, it will take over the SIGIO signal (by set it's handler).

Important traits for WriteFile<'a>

impl<'a> Future for WriteFile<'a> type Output = Result<()>;

pub fn write<'a>(&self, offset: i64, buf: &'a [u8]) -> WriteFile<'a>

Write buffer into file with aio.

pub fn fallocate(&self, offset: i64, len: i64) -> Result<()>

fallocate the file.

Trait Implementations

impl Drop for File

fn drop(&mut self)

Executes the destructor for this type.