Module futures::io

Asynchronous I/O.

This module is the asynchronous version of std::io. It defines two traits, AsyncRead, AsyncWrite, AsyncSeek, and AsyncBufRead, which mirror the Read, Write, Seek, and BufRead traits of the standard library. However, these traits integrate with the asynchronous task system, so that if an I/O object isn't ready for reading (or writing), the thread is not blocked, and instead the current task is queued to be woken when I/O is ready.

In addition, the AsyncReadExt, AsyncWriteExt, AsyncSeekExt, and AsyncBufReadExt extension traits offer a variety of useful combinators for operating with asynchronous I/O objects, including ways to work with them using futures, streams and sinks.

This module is only available when the std feature of this library is activated, and it is activated by default.

Structs

AllowStdIo	A simple wrapper type which allows types which implement only implement std::io::Read or std::io::Write to be used in contexts which expect an AsyncRead or AsyncWrite.
BufReader	The BufReader struct adds buffering to any reader.
BufWriter	Wraps a writer and buffers its output.
Close	Future for the close method.
CopyBufInto	Future for the copy_buf_into method.
CopyInto	Future for the copy_into method.
Error	The error type for I/O operations of the Read, Write, Seek, and associated traits.
Flush	Future for the flush method.
Initializer	A type used to conditionally initialize buffers passed to AsyncRead methods, modeled after std.
IoSlice	A buffer type used with Write::write_vectored.
IoSliceMut	A buffer type used with Read::read_vectored.
Lines	Stream for the lines method.
Read	Future for the read method.
ReadExact	Future for the read_exact method.
ReadHalf	The readable half of an object returned from AsyncRead::split.
ReadLine	Future for the read_line method.
ReadToEnd	Future for the read_to_end method.
ReadUntil	Future for the read_until method.
ReadVectored	Future for the read_vectored method.
Seek	Future for the seek method.
Window	A owned window around an underlying buffer.
Write	Future for the write method.
WriteAll	Future for the write_all method.
WriteHalf	The writable half of an object returned from AsyncRead::split.
WriteVectored	Future for the write_vectored method.

Enums

ErrorKind	A list specifying general categories of I/O error.
SeekFrom	Enumeration of possible methods to seek within an I/O object.

Traits

AsyncBufRead	Read bytes asynchronously.
AsyncBufReadExt	An extension trait which adds utility methods to AsyncBufRead types.
AsyncRead	Read bytes asynchronously.
AsyncReadExt	An extension trait which adds utility methods to AsyncRead types.
AsyncSeek	Seek bytes asynchronously.
AsyncSeekExt	An extension trait which adds utility methods to AsyncSeek types.
AsyncWrite	Write bytes asynchronously.
AsyncWriteExt	An extension trait which adds utility methods to AsyncWrite types.

Type Definitions

Result

A specialized Result type for I/O operations.