Struct wasi_common::pipe::WritePipe

pub struct WritePipe<W: Write> { /* fields omitted */ }

A virtual pipe write end.

use wasi_common::{pipe::WritePipe, WasiCtx, Table};
let stdout = WritePipe::new_in_memory();
// Brint these instances from elsewhere (e.g. wasi-cap-std-sync):
let random = todo!();
let clocks = todo!();
let sched = todo!();
let table = Table::new();
let mut ctx = WasiCtx::new(random, clocks, sched, table);
ctx.set_stdout(Box::new(stdout.clone()));
// use ctx in an instance, then make sure it is dropped:
drop(ctx);
let contents: Vec<u8> = stdout.try_into_inner().expect("sole remaining reference to WritePipe").into_inner();
println!("contents of stdout: {:?}", contents);

Implementations

impl<W: Write> WritePipe<W>

pub fn new(w: W) -> Self

Create a new pipe from a Write type.

All Handle write operations delegate to writing to this underlying writer.

pub fn from_shared(writer: Arc<RwLock<W>>) -> Self

Create a new pipe from a shareable Write type.

All Handle write operations delegate to writing to this underlying writer.

pub fn try_into_inner(self) -> Result<W, Self>

Try to convert this WritePipe<W> back to the underlying W type.

This will fail with Err(self) if multiple references to the underlying W exist.

impl WritePipe<Cursor<Vec<u8>>>

pub fn new_in_memory() -> Self

Create a new writable virtual pipe backed by a Vec<u8> buffer.

Trait Implementations

impl<W: Write> Clone for WritePipe<W>

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<W: Debug + Write> Debug for WritePipe<W>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<W: Write + Any + Send + Sync> WasiFile for WritePipe<W>

fn as_any(&self) -> &dyn Any

fn datasync<'life0, 'async_trait>(
    &'life0 self
) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>> where
    'life0: 'async_trait,
    Self: 'async_trait, 

fn sync<'life0, 'async_trait>(
    &'life0 self
) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>> where
    'life0: 'async_trait,
    Self: 'async_trait, 

fn get_filetype<'life0, 'async_trait>(
    &'life0 self
) -> Pin<Box<dyn Future<Output = Result<FileType, Error>> + Send + 'async_trait>> where
    'life0: 'async_trait,
    Self: 'async_trait, 

fn get_fdflags<'life0, 'async_trait>(
    &'life0 self
) -> Pin<Box<dyn Future<Output = Result<FdFlags, Error>> + Send + 'async_trait>> where
    'life0: 'async_trait,
    Self: 'async_trait, 

fn set_fdflags<'life0, 'async_trait>(
    &'life0 mut self,
    _fdflags: FdFlags
) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>> where
    'life0: 'async_trait,
    Self: 'async_trait, 

fn get_filestat<'life0, 'async_trait>(
    &'life0 self
) -> Pin<Box<dyn Future<Output = Result<Filestat, Error>> + Send + 'async_trait>> where
    'life0: 'async_trait,
    Self: 'async_trait, 

fn set_filestat_size<'life0, 'async_trait>(
    &'life0 self,
    _size: u64
) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>> where
    'life0: 'async_trait,
    Self: 'async_trait, 

fn advise<'life0, 'async_trait>(
    &'life0 self,
    offset: u64,
    len: u64,
    advice: Advice
) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>> where
    'life0: 'async_trait,
    Self: 'async_trait, 

fn allocate<'life0, 'async_trait>(
    &'life0 self,
    offset: u64,
    len: u64
) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>> where
    'life0: 'async_trait,
    Self: 'async_trait, 

fn read_vectored<'a, 'life0, 'life1, 'async_trait>(
    &'life0 self,
    bufs: &'life1 mut [IoSliceMut<'a>]
) -> Pin<Box<dyn Future<Output = Result<u64, Error>> + Send + 'async_trait>> where
    'a: 'async_trait,
    'life0: 'async_trait,
    'life1: 'async_trait,
    Self: 'async_trait, 

fn read_vectored_at<'a, 'life0, 'life1, 'async_trait>(
    &'life0 self,
    bufs: &'life1 mut [IoSliceMut<'a>],
    offset: u64
) -> Pin<Box<dyn Future<Output = Result<u64, Error>> + Send + 'async_trait>> where
    'a: 'async_trait,
    'life0: 'async_trait,
    'life1: 'async_trait,
    Self: 'async_trait, 

fn write_vectored<'a, 'life0, 'life1, 'async_trait>(
    &'life0 self,
    bufs: &'life1 [IoSlice<'a>]
) -> Pin<Box<dyn Future<Output = Result<u64, Error>> + Send + 'async_trait>> where
    'a: 'async_trait,
    'life0: 'async_trait,
    'life1: 'async_trait,
    Self: 'async_trait, 

fn write_vectored_at<'a, 'life0, 'life1, 'async_trait>(
    &'life0 self,
    bufs: &'life1 [IoSlice<'a>],
    offset: u64
) -> Pin<Box<dyn Future<Output = Result<u64, Error>> + Send + 'async_trait>> where
    'a: 'async_trait,
    'life0: 'async_trait,
    'life1: 'async_trait,
    Self: 'async_trait, 

fn seek<'life0, 'async_trait>(
    &'life0 self,
    pos: SeekFrom
) -> Pin<Box<dyn Future<Output = Result<u64, Error>> + Send + 'async_trait>> where
    'life0: 'async_trait,
    Self: 'async_trait, 

fn peek<'life0, 'life1, 'async_trait>(
    &'life0 self,
    buf: &'life1 mut [u8]
) -> Pin<Box<dyn Future<Output = Result<u64, Error>> + Send + 'async_trait>> where
    'life0: 'async_trait,
    'life1: 'async_trait,
    Self: 'async_trait, 

fn set_times<'life0, 'async_trait>(
    &'life0 self,
    atime: Option<SystemTimeSpec>,
    mtime: Option<SystemTimeSpec>
) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>> where
    'life0: 'async_trait,
    Self: 'async_trait, 

fn num_ready_bytes<'life0, 'async_trait>(
    &'life0 self
) -> Pin<Box<dyn Future<Output = Result<u64, Error>> + Send + 'async_trait>> where
    'life0: 'async_trait,
    Self: 'async_trait, 

fn readable<'life0, 'async_trait>(
    &'life0 self
) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>> where
    'life0: 'async_trait,
    Self: 'async_trait, 

fn writable<'life0, 'async_trait>(
    &'life0 self
) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>> where
    'life0: 'async_trait,
    Self: 'async_trait,