Trait salvo_core::rt::Write
source · pub trait Write {
// Required methods
fn poll_write(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &[u8]
) -> Poll<Result<usize, Error>>;
fn poll_flush(
self: Pin<&mut Self>,
cx: &mut Context<'_>
) -> Poll<Result<(), Error>>;
fn poll_shutdown(
self: Pin<&mut Self>,
cx: &mut Context<'_>
) -> Poll<Result<(), Error>>;
// Provided methods
fn is_write_vectored(&self) -> bool { ... }
fn poll_write_vectored(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
bufs: &[IoSlice<'_>]
) -> Poll<Result<usize, Error>> { ... }
}Expand description
Write bytes asynchronously.
This trait is similar to std::io::Write, but for asynchronous writes.
Required Methods§
sourcefn poll_write(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &[u8]
) -> Poll<Result<usize, Error>>
fn poll_write( self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &[u8] ) -> Poll<Result<usize, Error>>
Attempt to write bytes from buf into the destination.
On success, returns Poll::Ready(Ok(num_bytes_written))). If
successful, it must be guaranteed that n <= buf.len(). A return value
of 0 means that the underlying object is no longer able to accept
bytes, or that the provided buffer is empty.
If the object is not ready for writing, the method returns
Poll::Pending and arranges for the current task (via cx.waker()) to
receive a notification when the object becomes writable or is closed.
sourcefn poll_flush(
self: Pin<&mut Self>,
cx: &mut Context<'_>
) -> Poll<Result<(), Error>>
fn poll_flush( self: Pin<&mut Self>, cx: &mut Context<'_> ) -> Poll<Result<(), Error>>
Attempts to flush the object.
On success, returns Poll::Ready(Ok(())).
If flushing cannot immediately complete, this method returns
Poll::Pending and arranges for the current task (via cx.waker()) to
receive a notification when the object can make progress.
Provided Methods§
sourcefn is_write_vectored(&self) -> bool
fn is_write_vectored(&self) -> bool
Returns whether this writer has an efficient poll_write_vectored
implementation.
The default implementation returns false.