Struct WritePipe

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

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

where Self: 'async_trait, 'life0: 'async_trait,

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

where Self: 'async_trait, 'life0: '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 Self: 'async_trait, 'a: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

fn pollable(&self) -> Option<BorrowedFd<'_>>

fn isatty(&self) -> bool

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

where Self: 'async_trait, 'life0: 'async_trait,

fn sock_recv<'a, 'life0, 'life1, 'async_trait>( &'life0 self, _ri_data: &'life1 mut [IoSliceMut<'a>], _ri_flags: RiFlags, ) -> Pin<Box<dyn Future<Output = Result<(u64, RoFlags), Error>> + Send + 'async_trait>>

where Self: 'async_trait, 'a: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

fn sock_send<'a, 'life0, 'life1, 'async_trait>( &'life0 self, _si_data: &'life1 [IoSlice<'a>], _si_flags: SiFlags, ) -> Pin<Box<dyn Future<Output = Result<u64, Error>> + Send + 'async_trait>>

where Self: 'async_trait, 'a: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

fn sock_shutdown<'life0, 'async_trait>( &'life0 self, _how: SdFlags, ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

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

where Self: 'async_trait, 'life0: 'async_trait,

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

where Self: 'async_trait, 'life0: 'async_trait,

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

where Self: 'async_trait, 'life0: 'async_trait,

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

where Self: 'async_trait, 'life0: 'async_trait,

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

where Self: 'async_trait, 'life0: '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 Self: 'async_trait, 'life0: '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 Self: 'async_trait, 'life0: '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 Self: 'async_trait, 'a: 'async_trait, 'life0: 'async_trait, 'life1: '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 Self: 'async_trait, 'a: 'async_trait, 'life0: 'async_trait, 'life1: '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 Self: 'async_trait, 'a: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

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

where Self: 'async_trait, 'life0: '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 Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

fn num_ready_bytes(&self) -> Result<u64, Error>

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

where Self: 'async_trait, 'life0: 'async_trait,

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

where Self: 'async_trait, 'life0: 'async_trait,