Struct wasi_common::pipe::WritePipe

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

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§

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impl<W: Write> WritePipe<W>

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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.

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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.

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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.

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impl WritePipe<Cursor<Vec<u8>>>

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pub fn new_in_memory() -> Self

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

Trait Implementations§

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impl<W: Write> Clone for WritePipe<W>

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fn clone(&self) -> Self

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<W: Debug + Write> Debug for WritePipe<W>

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

Formats the value using the given formatter. Read more
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impl<W: Write + Any + Send + Sync> WasiFile for WritePipe<W>

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fn as_any(&self) -> &dyn Any

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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,

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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,

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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,

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

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fn isatty(&self) -> bool

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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,

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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,

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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,

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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,

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

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

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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

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

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

Auto Trait Implementations§

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impl<W> Freeze for WritePipe<W>

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impl<W> RefUnwindSafe for WritePipe<W>

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impl<W> Send for WritePipe<W>
where W: Sync + Send,

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impl<W> Sync for WritePipe<W>
where W: Sync + Send,

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impl<W> Unpin for WritePipe<W>

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impl<W> UnwindSafe for WritePipe<W>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> GetSetFdFlags for T

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fn get_fd_flags(&self) -> Result<FdFlags, Error>
where T: AsFilelike,

Query the “status” flags for the self file descriptor.
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fn new_set_fd_flags(&self, fd_flags: FdFlags) -> Result<SetFdFlags<T>, Error>
where T: AsFilelike,

Create a new SetFdFlags value for use with set_fd_flags. Read more
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fn set_fd_flags(&mut self, set_fd_flags: SetFdFlags<T>) -> Result<(), Error>
where T: AsFilelike,

Set the “status” flags for the self file descriptor. Read more
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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Pointee for T

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type Pointer = u32

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fn debug( pointer: <T as Pointee>::Pointer, f: &mut Formatter<'_> ) -> Result<(), Error>

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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more