Struct wasi_common::virtfs::InMemoryFile

pub struct InMemoryFile { /* fields omitted */ }

An InMemoryFile is a shared handle to some underlying data. The relationship is analagous to a filesystem wherein a file descriptor is one view into a possibly-shared underlying collection of data and permissions on a filesystem.

Implementations

impl InMemoryFile

pub fn memory_backed() -> Self

pub fn new(contents: Box<dyn FileContents>) -> Self

Trait Implementations

impl Handle for InMemoryFile

fn as_any(&self) -> &dyn Any

fn try_clone(&self) -> Result<Box<dyn Handle>>

fn get_file_type(&self) -> Filetype

fn get_rights(&self) -> HandleRights

fn set_rights(&self, rights: HandleRights)

fn advise(
    &self,
    _advice: Advice,
    _offset: Filesize,
    _len: Filesize
) -> Result<()>

fn allocate(&self, offset: Filesize, len: Filesize) -> Result<()>

fn fdstat_get(&self) -> Result<Fdflags>

fn fdstat_set_flags(&self, fdflags: Fdflags) -> Result<()>

fn filestat_get(&self) -> Result<Filestat>

fn filestat_set_size(&self, st_size: Filesize) -> Result<()>

fn preadv(&self, buf: &mut [IoSliceMut<'_>], offset: Filesize) -> Result<usize>

fn pwritev(&self, buf: &[IoSlice<'_>], offset: Filesize) -> Result<usize>

fn read_vectored(&self, iovs: &mut [IoSliceMut<'_>]) -> Result<usize>

fn seek(&self, offset: SeekFrom) -> Result<Filesize>

fn write_vectored(&self, iovs: &[IoSlice<'_>]) -> Result<usize>

fn create_directory(&self, _path: &str) -> Result<()>

fn openat(
    &self,
    path: &str,
    _read: bool,
    _write: bool,
    oflags: Oflags,
    _fd_flags: Fdflags
) -> Result<Box<dyn Handle>>

fn link(
    &self,
    _old_path: &str,
    _new_handle: Box<dyn Handle>,
    _new_path: &str,
    _follow: bool
) -> Result<()>

fn readlink(&self, _path: &str, _buf: &mut [u8]) -> Result<usize>

fn readlinkat(&self, _path: &str) -> Result<String>

fn rename(
    &self,
    _old_path: &str,
    _new_handle: Box<dyn Handle>,
    _new_path: &str
) -> Result<()>

fn remove_directory(&self, _path: &str) -> Result<()>

fn symlink(&self, _old_path: &str, _new_path: &str) -> Result<()>

fn unlink_file(&self, _path: &str) -> Result<()>

fn is_directory(&self) -> bool

fn is_tty(&self) -> bool

Test whether this descriptor is considered a tty within WASI. Note that since WASI itself lacks an isatty syscall and relies on a conservative approximation, we use the same approximation here.

fn datasync(&self) -> Result<()>

fn filestat_set_times(
    &self,
    _atim: Timestamp,
    _mtim: Timestamp,
    _fst_flags: Fstflags
) -> Result<()>

fn readdir<'a>(
    &'a self,
    _cookie: Dircookie
) -> Result<Box<dyn Iterator<Item = Result<(Dirent, String)>> + 'a>>

fn sync(&self) -> Result<()>

fn filestat_get_at(&self, _path: &str, _follow: bool) -> Result<Filestat>

fn filestat_set_times_at(
    &self,
    _path: &str,
    _atim: Timestamp,
    _mtim: Timestamp,
    _fst_flags: Fstflags,
    _follow: bool
) -> Result<()>