pub struct DataWriter { /* private fields */ }Expand description
The write half of a DataStream, implementing futures::io::AsyncWrite.
See the DataStream docs for more information. In particular, note
that this writer requires poll_flush to complete in order to guarantee that
all data has been written.
§Usage with Tokio
If the tokio crate feature is enabled, this type also implements
tokio::io::AsyncWrite for easier integration
with code that expects that trait.
§Drop and close
Note that dropping a DataWriter has no special effect on its own:
if the DataWriter is dropped, the underlying stream will still remain open
until the DataReader is also dropped.
If you want the stream to close earlier, use close
(or shutdown with tokio).
Remember that Tor does not support half-open streams:
If you close or shutdown a stream,
the other side will not see the stream as half-open,
and so will (probably) not finish sending you any in-progress data.
Do not use close/shutdown to communicate anything besides
“I am done using this stream.”
Trait Implementations§
Source§impl AsyncWrite for DataWriter
impl AsyncWrite for DataWriter
Source§fn poll_write(
self: Pin<&mut DataWriter>,
cx: &mut Context<'_>,
buf: &[u8],
) -> Poll<Result<usize, Error>>
fn poll_write( self: Pin<&mut DataWriter>, cx: &mut Context<'_>, buf: &[u8], ) -> Poll<Result<usize, Error>>
Attempt to write bytes from
buf into the object. Read moreSource§fn poll_flush(
self: Pin<&mut DataWriter>,
cx: &mut Context<'_>,
) -> Poll<Result<(), Error>>
fn poll_flush( self: Pin<&mut DataWriter>, cx: &mut Context<'_>, ) -> Poll<Result<(), Error>>
Attempt to flush the object, ensuring that any buffered data reach
their destination. Read more
Source§impl AsyncWrite for DataWriter
impl AsyncWrite for DataWriter
Source§fn poll_write(
self: Pin<&mut DataWriter>,
cx: &mut Context<'_>,
buf: &[u8],
) -> Poll<Result<usize, Error>>
fn poll_write( self: Pin<&mut DataWriter>, cx: &mut Context<'_>, buf: &[u8], ) -> Poll<Result<usize, Error>>
Attempt to write bytes from
buf into the object. Read moreSource§fn poll_flush(
self: Pin<&mut DataWriter>,
cx: &mut Context<'_>,
) -> Poll<Result<(), Error>>
fn poll_flush( self: Pin<&mut DataWriter>, cx: &mut Context<'_>, ) -> Poll<Result<(), Error>>
Attempts to flush the object, ensuring that any buffered data reach
their destination. Read more
Source§fn poll_shutdown(
self: Pin<&mut DataWriter>,
cx: &mut Context<'_>,
) -> Poll<Result<(), Error>>
fn poll_shutdown( self: Pin<&mut DataWriter>, cx: &mut Context<'_>, ) -> Poll<Result<(), Error>>
Initiates or attempts to shut down this writer, returning success when
the I/O connection has completely shut down. Read more
Source§fn poll_write_vectored(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
bufs: &[IoSlice<'_>],
) -> Poll<Result<usize, Error>>
fn poll_write_vectored( self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &[IoSlice<'_>], ) -> Poll<Result<usize, Error>>
Like
poll_write, except that it writes from a slice of buffers. Read moreSource§fn is_write_vectored(&self) -> bool
fn is_write_vectored(&self) -> bool
Determines if this writer has an efficient
poll_write_vectored
implementation. Read moreAuto Trait Implementations§
impl !Freeze for DataWriter
impl !RefUnwindSafe for DataWriter
impl Send for DataWriter
impl Sync for DataWriter
impl Unpin for DataWriter
impl !UnwindSafe for DataWriter
Blanket Implementations§
Source§impl<'a, T, E> AsTaggedExplicit<'a, E> for Twhere
T: 'a,
impl<'a, T, E> AsTaggedExplicit<'a, E> for Twhere
T: 'a,
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T: 'a,
impl<'a, T, E> AsTaggedImplicit<'a, E> for Twhere
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Source§impl<W> AsyncWriteExt for Wwhere
W: AsyncWrite + ?Sized,
impl<W> AsyncWriteExt for Wwhere
W: AsyncWrite + ?Sized,
Source§fn flush(&mut self) -> Flush<'_, Self>where
Self: Unpin,
fn flush(&mut self) -> Flush<'_, Self>where
Self: Unpin,
Creates a future which will entirely flush this
AsyncWrite. Read moreSource§fn close(&mut self) -> Close<'_, Self>where
Self: Unpin,
fn close(&mut self) -> Close<'_, Self>where
Self: Unpin,
Creates a future which will entirely close this
AsyncWrite.Source§fn write<'a>(&'a mut self, buf: &'a [u8]) -> Write<'a, Self>where
Self: Unpin,
fn write<'a>(&'a mut self, buf: &'a [u8]) -> Write<'a, Self>where
Self: Unpin,
Creates a future which will write bytes from
buf into the object. Read moreSource§fn write_vectored<'a>(
&'a mut self,
bufs: &'a [IoSlice<'a>],
) -> WriteVectored<'a, Self>where
Self: Unpin,
fn write_vectored<'a>(
&'a mut self,
bufs: &'a [IoSlice<'a>],
) -> WriteVectored<'a, Self>where
Self: Unpin,
Creates a future which will write bytes from
bufs into the object using vectored
IO operations. Read moreSource§impl<W> AsyncWriteExt for Wwhere
W: AsyncWrite + ?Sized,
impl<W> AsyncWriteExt for Wwhere
W: AsyncWrite + ?Sized,
Source§fn write<'a>(&'a mut self, src: &'a [u8]) -> Write<'a, Self>where
Self: Unpin,
fn write<'a>(&'a mut self, src: &'a [u8]) -> Write<'a, Self>where
Self: Unpin,
Writes a buffer into this writer, returning how many bytes were
written. Read more
Source§fn write_vectored<'a, 'b>(
&'a mut self,
bufs: &'a [IoSlice<'b>],
) -> WriteVectored<'a, 'b, Self>where
Self: Unpin,
fn write_vectored<'a, 'b>(
&'a mut self,
bufs: &'a [IoSlice<'b>],
) -> WriteVectored<'a, 'b, Self>where
Self: Unpin,
Source§fn write_buf<'a, B>(&'a mut self, src: &'a mut B) -> WriteBuf<'a, Self, B>
fn write_buf<'a, B>(&'a mut self, src: &'a mut B) -> WriteBuf<'a, Self, B>
Writes a buffer into this writer, advancing the buffer’s internal
cursor. Read more
Source§fn write_all_buf<'a, B>(
&'a mut self,
src: &'a mut B,
) -> WriteAllBuf<'a, Self, B>
fn write_all_buf<'a, B>( &'a mut self, src: &'a mut B, ) -> WriteAllBuf<'a, Self, B>
Attempts to write an entire buffer into this writer. Read more
Source§fn write_all<'a>(&'a mut self, src: &'a [u8]) -> WriteAll<'a, Self>where
Self: Unpin,
fn write_all<'a>(&'a mut self, src: &'a [u8]) -> WriteAll<'a, Self>where
Self: Unpin,
Attempts to write an entire buffer into this writer. Read more
Source§fn write_u8(&mut self, n: u8) -> WriteU8<&mut Self>where
Self: Unpin,
fn write_u8(&mut self, n: u8) -> WriteU8<&mut Self>where
Self: Unpin,
Writes an unsigned 8-bit integer to the underlying writer. Read more
Source§fn write_i8(&mut self, n: i8) -> WriteI8<&mut Self>where
Self: Unpin,
fn write_i8(&mut self, n: i8) -> WriteI8<&mut Self>where
Self: Unpin,
Writes a signed 8-bit integer to the underlying writer. Read more
Source§fn write_u16(&mut self, n: u16) -> WriteU16<&mut Self>where
Self: Unpin,
fn write_u16(&mut self, n: u16) -> WriteU16<&mut Self>where
Self: Unpin,
Writes an unsigned 16-bit integer in big-endian order to the
underlying writer. Read more
Source§fn write_i16(&mut self, n: i16) -> WriteI16<&mut Self>where
Self: Unpin,
fn write_i16(&mut self, n: i16) -> WriteI16<&mut Self>where
Self: Unpin,
Writes a signed 16-bit integer in big-endian order to the
underlying writer. Read more
Source§fn write_u32(&mut self, n: u32) -> WriteU32<&mut Self>where
Self: Unpin,
fn write_u32(&mut self, n: u32) -> WriteU32<&mut Self>where
Self: Unpin,
Writes an unsigned 32-bit integer in big-endian order to the
underlying writer. Read more
Source§fn write_i32(&mut self, n: i32) -> WriteI32<&mut Self>where
Self: Unpin,
fn write_i32(&mut self, n: i32) -> WriteI32<&mut Self>where
Self: Unpin,
Writes a signed 32-bit integer in big-endian order to the
underlying writer. Read more
Source§fn write_u64(&mut self, n: u64) -> WriteU64<&mut Self>where
Self: Unpin,
fn write_u64(&mut self, n: u64) -> WriteU64<&mut Self>where
Self: Unpin,
Writes an unsigned 64-bit integer in big-endian order to the
underlying writer. Read more
Source§fn write_i64(&mut self, n: i64) -> WriteI64<&mut Self>where
Self: Unpin,
fn write_i64(&mut self, n: i64) -> WriteI64<&mut Self>where
Self: Unpin,
Writes an signed 64-bit integer in big-endian order to the
underlying writer. Read more
Source§fn write_u128(&mut self, n: u128) -> WriteU128<&mut Self>where
Self: Unpin,
fn write_u128(&mut self, n: u128) -> WriteU128<&mut Self>where
Self: Unpin,
Writes an unsigned 128-bit integer in big-endian order to the
underlying writer. Read more
Source§fn write_i128(&mut self, n: i128) -> WriteI128<&mut Self>where
Self: Unpin,
fn write_i128(&mut self, n: i128) -> WriteI128<&mut Self>where
Self: Unpin,
Writes an signed 128-bit integer in big-endian order to the
underlying writer. Read more
Source§fn write_f32(&mut self, n: f32) -> WriteF32<&mut Self>where
Self: Unpin,
fn write_f32(&mut self, n: f32) -> WriteF32<&mut Self>where
Self: Unpin,
Writes an 32-bit floating point type in big-endian order to the
underlying writer. Read more
Source§fn write_f64(&mut self, n: f64) -> WriteF64<&mut Self>where
Self: Unpin,
fn write_f64(&mut self, n: f64) -> WriteF64<&mut Self>where
Self: Unpin,
Writes an 64-bit floating point type in big-endian order to the
underlying writer. Read more
Source§fn write_u16_le(&mut self, n: u16) -> WriteU16Le<&mut Self>where
Self: Unpin,
fn write_u16_le(&mut self, n: u16) -> WriteU16Le<&mut Self>where
Self: Unpin,
Writes an unsigned 16-bit integer in little-endian order to the
underlying writer. Read more
Source§fn write_i16_le(&mut self, n: i16) -> WriteI16Le<&mut Self>where
Self: Unpin,
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Self: Unpin,
Writes a signed 16-bit integer in little-endian order to the
underlying writer. Read more
Source§fn write_u32_le(&mut self, n: u32) -> WriteU32Le<&mut Self>where
Self: Unpin,
fn write_u32_le(&mut self, n: u32) -> WriteU32Le<&mut Self>where
Self: Unpin,
Writes an unsigned 32-bit integer in little-endian order to the
underlying writer. Read more
Source§fn write_i32_le(&mut self, n: i32) -> WriteI32Le<&mut Self>where
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Self: Unpin,
Writes a signed 32-bit integer in little-endian order to the
underlying writer. Read more
Source§fn write_u64_le(&mut self, n: u64) -> WriteU64Le<&mut Self>where
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fn write_u64_le(&mut self, n: u64) -> WriteU64Le<&mut Self>where
Self: Unpin,
Writes an unsigned 64-bit integer in little-endian order to the
underlying writer. Read more
Source§fn write_i64_le(&mut self, n: i64) -> WriteI64Le<&mut Self>where
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Writes an signed 64-bit integer in little-endian order to the
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Source§fn write_u128_le(&mut self, n: u128) -> WriteU128Le<&mut Self>where
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Self: Unpin,
Writes an unsigned 128-bit integer in little-endian order to the
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Source§fn write_f32_le(&mut self, n: f32) -> WriteF32Le<&mut Self>where
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Writes an 32-bit floating point type in little-endian order to the
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Source§fn write_f64_le(&mut self, n: f64) -> WriteF64Le<&mut Self>where
Self: Unpin,
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Self: Unpin,
Writes an 64-bit floating point type in little-endian order to the
underlying writer. Read more
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Size: 296 bytes