futures-io-0.3.17/.cargo_vcs_info.json0000644000000001120000000000100132200ustar { "git": { "sha1": "7caefa51304e78fd5018cd5d2a03f3b9089cc010" } } futures-io-0.3.17/Cargo.toml0000644000000020440000000000100112240ustar # THIS FILE IS AUTOMATICALLY GENERATED BY CARGO # # When uploading crates to the registry Cargo will automatically # "normalize" Cargo.toml files for maximal compatibility # with all versions of Cargo and also rewrite `path` dependencies # to registry (e.g., crates.io) dependencies. # # If you are reading this file be aware that the original Cargo.toml # will likely look very different (and much more reasonable). # See Cargo.toml.orig for the original contents. [package] edition = "2018" name = "futures-io" version = "0.3.17" authors = ["Alex Crichton "] description = "The `AsyncRead`, `AsyncWrite`, `AsyncSeek`, and `AsyncBufRead` traits for the futures-rs library.\n" homepage = "https://rust-lang.github.io/futures-rs" documentation = "https://docs.rs/futures-io/0.3" license = "MIT OR Apache-2.0" repository = "https://github.com/rust-lang/futures-rs" [package.metadata.docs.rs] all-features = true rustdoc-args = ["--cfg", "docsrs"] [dependencies] [features] default = ["std"] read-initializer = [] std = [] unstable = [] futures-io-0.3.17/Cargo.toml.orig000064400000000000000000000013640072674642500147410ustar 00000000000000[package] name = "futures-io" edition = "2018" version = "0.3.17" authors = ["Alex Crichton "] license = "MIT OR Apache-2.0" repository = "https://github.com/rust-lang/futures-rs" homepage = "https://rust-lang.github.io/futures-rs" documentation = "https://docs.rs/futures-io/0.3" description = """ The `AsyncRead`, `AsyncWrite`, `AsyncSeek`, and `AsyncBufRead` traits for the futures-rs library. """ [features] default = ["std"] std = [] # Unstable features # These features are outside of the normal semver guarantees and require the # `unstable` feature as an explicit opt-in to unstable API. unstable = [] read-initializer = [] [dependencies] [package.metadata.docs.rs] all-features = true rustdoc-args = ["--cfg", "docsrs"] futures-io-0.3.17/LICENSE-APACHE000064400000000000000000000251720072674642500140010ustar 00000000000000 Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. "License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. "Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License. "Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. 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While redistributing the Work or Derivative Works thereof, You may choose to offer, and charge a fee for, acceptance of support, warranty, indemnity, or other liability obligations and/or rights consistent with this License. However, in accepting such obligations, You may act only on Your own behalf and on Your sole responsibility, not on behalf of any other Contributor, and only if You agree to indemnify, defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against, such Contributor by reason of your accepting any such warranty or additional liability. END OF TERMS AND CONDITIONS APPENDIX: How to apply the Apache License to your work. To apply the Apache License to your work, attach the following boilerplate notice, with the fields enclosed by brackets "[]" replaced with your own identifying information. (Don't include the brackets!) The text should be enclosed in the appropriate comment syntax for the file format. We also recommend that a file or class name and description of purpose be included on the same "printed page" as the copyright notice for easier identification within third-party archives. Copyright (c) 2016 Alex Crichton Copyright (c) 2017 The Tokio Authors Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. futures-io-0.3.17/LICENSE-MIT000064400000000000000000000021060072674642500135010ustar 00000000000000Copyright (c) 2016 Alex Crichton Copyright (c) 2017 The Tokio Authors Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. futures-io-0.3.17/src/lib.rs000064400000000000000000000541630072674642500137620ustar 00000000000000//! Asynchronous I/O //! //! This crate contains the `AsyncRead`, `AsyncWrite`, `AsyncSeek`, and //! `AsyncBufRead` traits, the asynchronous analogs to //! `std::io::{Read, Write, Seek, BufRead}`. The primary difference is //! that these traits integrate with the asynchronous task system. //! //! All items of this library are only available when the `std` feature of this //! library is activated, and it is activated by default. #![cfg_attr(all(feature = "read-initializer", feature = "std"), feature(read_initializer))] #![cfg_attr(not(feature = "std"), no_std)] #![warn(missing_debug_implementations, missing_docs, rust_2018_idioms, unreachable_pub)] // It cannot be included in the published code because this lints have false positives in the minimum required version. #![cfg_attr(test, warn(single_use_lifetimes))] #![doc(test( no_crate_inject, attr( deny(warnings, rust_2018_idioms, single_use_lifetimes), allow(dead_code, unused_assignments, unused_variables) ) ))] #![cfg_attr(docsrs, feature(doc_cfg))] #[cfg(all(feature = "read-initializer", not(feature = "unstable")))] compile_error!("The `read-initializer` feature requires the `unstable` feature as an explicit opt-in to unstable features"); #[cfg(feature = "std")] mod if_std { use std::io; use std::ops::DerefMut; use std::pin::Pin; use std::task::{Context, Poll}; // Re-export some types from `std::io` so that users don't have to deal // with conflicts when `use`ing `futures::io` and `std::io`. #[cfg(feature = "read-initializer")] #[cfg_attr(docsrs, doc(cfg(feature = "read-initializer")))] #[doc(no_inline)] #[allow(unreachable_pub)] // https://github.com/rust-lang/rust/issues/57411 pub use io::Initializer; #[allow(unreachable_pub)] // https://github.com/rust-lang/rust/issues/57411 #[doc(no_inline)] pub use io::{Error, ErrorKind, IoSlice, IoSliceMut, Result, SeekFrom}; /// Read bytes asynchronously. /// /// This trait is analogous to the `std::io::Read` trait, but integrates /// with the asynchronous task system. In particular, the `poll_read` /// method, unlike `Read::read`, will automatically queue the current task /// for wakeup and return if data is not yet available, rather than blocking /// the calling thread. pub trait AsyncRead { /// Determines if this `AsyncRead`er can work with buffers of /// uninitialized memory. /// /// The default implementation returns an initializer which will zero /// buffers. /// /// This method is only available when the `read-initializer` feature of this /// library is activated. /// /// # Safety /// /// This method is `unsafe` because an `AsyncRead`er could otherwise /// return a non-zeroing `Initializer` from another `AsyncRead` type /// without an `unsafe` block. #[cfg(feature = "read-initializer")] #[cfg_attr(docsrs, doc(cfg(feature = "read-initializer")))] #[inline] unsafe fn initializer(&self) -> Initializer { Initializer::zeroing() } /// Attempt to read from the `AsyncRead` into `buf`. /// /// On success, returns `Poll::Ready(Ok(num_bytes_read))`. /// /// If no data is available for reading, the method returns /// `Poll::Pending` and arranges for the current task (via /// `cx.waker().wake_by_ref()`) to receive a notification when the object becomes /// readable or is closed. /// /// # Implementation /// /// This function may not return errors of kind `WouldBlock` or /// `Interrupted`. Implementations must convert `WouldBlock` into /// `Poll::Pending` and either internally retry or convert /// `Interrupted` into another error kind. fn poll_read( self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &mut [u8], ) -> Poll>; /// Attempt to read from the `AsyncRead` into `bufs` using vectored /// IO operations. /// /// This method is similar to `poll_read`, but allows data to be read /// into multiple buffers using a single operation. /// /// On success, returns `Poll::Ready(Ok(num_bytes_read))`. /// /// If no data is available for reading, the method returns /// `Poll::Pending` and arranges for the current task (via /// `cx.waker().wake_by_ref()`) to receive a notification when the object becomes /// readable or is closed. /// By default, this method delegates to using `poll_read` on the first /// nonempty buffer in `bufs`, or an empty one if none exists. Objects which /// support vectored IO should override this method. /// /// # Implementation /// /// This function may not return errors of kind `WouldBlock` or /// `Interrupted`. Implementations must convert `WouldBlock` into /// `Poll::Pending` and either internally retry or convert /// `Interrupted` into another error kind. fn poll_read_vectored( self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &mut [IoSliceMut<'_>], ) -> Poll> { for b in bufs { if !b.is_empty() { return self.poll_read(cx, b); } } self.poll_read(cx, &mut []) } } /// Write bytes asynchronously. /// /// This trait is analogous to the `std::io::Write` trait, but integrates /// with the asynchronous task system. In particular, the `poll_write` /// method, unlike `Write::write`, will automatically queue the current task /// for wakeup and return if the writer cannot take more data, rather than blocking /// the calling thread. pub trait AsyncWrite { /// Attempt to write bytes from `buf` into the object. /// /// On success, returns `Poll::Ready(Ok(num_bytes_written))`. /// /// If the object is not ready for writing, the method returns /// `Poll::Pending` and arranges for the current task (via /// `cx.waker().wake_by_ref()`) to receive a notification when the object becomes /// writable or is closed. /// /// # Implementation /// /// This function may not return errors of kind `WouldBlock` or /// `Interrupted`. Implementations must convert `WouldBlock` into /// `Poll::Pending` and either internally retry or convert /// `Interrupted` into another error kind. /// /// `poll_write` must try to make progress by flushing the underlying object if /// that is the only way the underlying object can become writable again. fn poll_write( self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &[u8], ) -> Poll>; /// Attempt to write bytes from `bufs` into the object using vectored /// IO operations. /// /// This method is similar to `poll_write`, but allows data from multiple buffers to be written /// using a single operation. /// /// On success, returns `Poll::Ready(Ok(num_bytes_written))`. /// /// If the object is not ready for writing, the method returns /// `Poll::Pending` and arranges for the current task (via /// `cx.waker().wake_by_ref()`) to receive a notification when the object becomes /// writable or is closed. /// /// By default, this method delegates to using `poll_write` on the first /// nonempty buffer in `bufs`, or an empty one if none exists. Objects which /// support vectored IO should override this method. /// /// # Implementation /// /// This function may not return errors of kind `WouldBlock` or /// `Interrupted`. Implementations must convert `WouldBlock` into /// `Poll::Pending` and either internally retry or convert /// `Interrupted` into another error kind. fn poll_write_vectored( self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &[IoSlice<'_>], ) -> Poll> { for b in bufs { if !b.is_empty() { return self.poll_write(cx, b); } } self.poll_write(cx, &[]) } /// Attempt to flush the object, ensuring that any buffered data reach /// their destination. /// /// 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().wake_by_ref()`) to receive a notification when the object can make /// progress towards flushing. /// /// # Implementation /// /// This function may not return errors of kind `WouldBlock` or /// `Interrupted`. Implementations must convert `WouldBlock` into /// `Poll::Pending` and either internally retry or convert /// `Interrupted` into another error kind. /// /// It only makes sense to do anything here if you actually buffer data. fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll>; /// Attempt to close the object. /// /// On success, returns `Poll::Ready(Ok(()))`. /// /// If closing cannot immediately complete, this function returns /// `Poll::Pending` and arranges for the current task (via /// `cx.waker().wake_by_ref()`) to receive a notification when the object can make /// progress towards closing. /// /// # Implementation /// /// This function may not return errors of kind `WouldBlock` or /// `Interrupted`. Implementations must convert `WouldBlock` into /// `Poll::Pending` and either internally retry or convert /// `Interrupted` into another error kind. fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll>; } /// Seek bytes asynchronously. /// /// This trait is analogous to the `std::io::Seek` trait, but integrates /// with the asynchronous task system. In particular, the `poll_seek` /// method, unlike `Seek::seek`, will automatically queue the current task /// for wakeup and return if data is not yet available, rather than blocking /// the calling thread. pub trait AsyncSeek { /// Attempt to seek to an offset, in bytes, in a stream. /// /// A seek beyond the end of a stream is allowed, but behavior is defined /// by the implementation. /// /// If the seek operation completed successfully, /// this method returns the new position from the start of the stream. /// That position can be used later with [`SeekFrom::Start`]. /// /// # Errors /// /// Seeking to a negative offset is considered an error. /// /// # Implementation /// /// This function may not return errors of kind `WouldBlock` or /// `Interrupted`. Implementations must convert `WouldBlock` into /// `Poll::Pending` and either internally retry or convert /// `Interrupted` into another error kind. fn poll_seek( self: Pin<&mut Self>, cx: &mut Context<'_>, pos: SeekFrom, ) -> Poll>; } /// Read bytes asynchronously. /// /// This trait is analogous to the `std::io::BufRead` trait, but integrates /// with the asynchronous task system. In particular, the `poll_fill_buf` /// method, unlike `BufRead::fill_buf`, will automatically queue the current task /// for wakeup and return if data is not yet available, rather than blocking /// the calling thread. pub trait AsyncBufRead: AsyncRead { /// Attempt to return the contents of the internal buffer, filling it with more data /// from the inner reader if it is empty. /// /// On success, returns `Poll::Ready(Ok(buf))`. /// /// If no data is available for reading, the method returns /// `Poll::Pending` and arranges for the current task (via /// `cx.waker().wake_by_ref()`) to receive a notification when the object becomes /// readable or is closed. /// /// This function is a lower-level call. It needs to be paired with the /// [`consume`] method to function properly. When calling this /// method, none of the contents will be "read" in the sense that later /// calling [`poll_read`] may return the same contents. As such, [`consume`] must /// be called with the number of bytes that are consumed from this buffer to /// ensure that the bytes are never returned twice. /// /// [`poll_read`]: AsyncRead::poll_read /// [`consume`]: AsyncBufRead::consume /// /// An empty buffer returned indicates that the stream has reached EOF. /// /// # Implementation /// /// This function may not return errors of kind `WouldBlock` or /// `Interrupted`. Implementations must convert `WouldBlock` into /// `Poll::Pending` and either internally retry or convert /// `Interrupted` into another error kind. fn poll_fill_buf(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll>; /// Tells this buffer that `amt` bytes have been consumed from the buffer, /// so they should no longer be returned in calls to [`poll_read`]. /// /// This function is a lower-level call. It needs to be paired with the /// [`poll_fill_buf`] method to function properly. This function does /// not perform any I/O, it simply informs this object that some amount of /// its buffer, returned from [`poll_fill_buf`], has been consumed and should /// no longer be returned. As such, this function may do odd things if /// [`poll_fill_buf`] isn't called before calling it. /// /// The `amt` must be `<=` the number of bytes in the buffer returned by /// [`poll_fill_buf`]. /// /// [`poll_read`]: AsyncRead::poll_read /// [`poll_fill_buf`]: AsyncBufRead::poll_fill_buf fn consume(self: Pin<&mut Self>, amt: usize); } macro_rules! deref_async_read { () => { #[cfg(feature = "read-initializer")] unsafe fn initializer(&self) -> Initializer { (**self).initializer() } fn poll_read( mut self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &mut [u8], ) -> Poll> { Pin::new(&mut **self).poll_read(cx, buf) } fn poll_read_vectored( mut self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &mut [IoSliceMut<'_>], ) -> Poll> { Pin::new(&mut **self).poll_read_vectored(cx, bufs) } }; } impl AsyncRead for Box { deref_async_read!(); } impl AsyncRead for &mut T { deref_async_read!(); } impl

AsyncRead for Pin

where P: DerefMut + Unpin, P::Target: AsyncRead, { #[cfg(feature = "read-initializer")] unsafe fn initializer(&self) -> Initializer { (**self).initializer() } fn poll_read( self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &mut [u8], ) -> Poll> { self.get_mut().as_mut().poll_read(cx, buf) } fn poll_read_vectored( self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &mut [IoSliceMut<'_>], ) -> Poll> { self.get_mut().as_mut().poll_read_vectored(cx, bufs) } } macro_rules! delegate_async_read_to_stdio { () => { #[cfg(feature = "read-initializer")] unsafe fn initializer(&self) -> Initializer { io::Read::initializer(self) } fn poll_read( mut self: Pin<&mut Self>, _: &mut Context<'_>, buf: &mut [u8], ) -> Poll> { Poll::Ready(io::Read::read(&mut *self, buf)) } fn poll_read_vectored( mut self: Pin<&mut Self>, _: &mut Context<'_>, bufs: &mut [IoSliceMut<'_>], ) -> Poll> { Poll::Ready(io::Read::read_vectored(&mut *self, bufs)) } }; } impl AsyncRead for &[u8] { delegate_async_read_to_stdio!(); } macro_rules! deref_async_write { () => { fn poll_write( mut self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &[u8], ) -> Poll> { Pin::new(&mut **self).poll_write(cx, buf) } fn poll_write_vectored( mut self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &[IoSlice<'_>], ) -> Poll> { Pin::new(&mut **self).poll_write_vectored(cx, bufs) } fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { Pin::new(&mut **self).poll_flush(cx) } fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { Pin::new(&mut **self).poll_close(cx) } }; } impl AsyncWrite for Box { deref_async_write!(); } impl AsyncWrite for &mut T { deref_async_write!(); } impl

AsyncWrite for Pin

where P: DerefMut + Unpin, P::Target: AsyncWrite, { fn poll_write( self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &[u8], ) -> Poll> { self.get_mut().as_mut().poll_write(cx, buf) } fn poll_write_vectored( self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &[IoSlice<'_>], ) -> Poll> { self.get_mut().as_mut().poll_write_vectored(cx, bufs) } fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { self.get_mut().as_mut().poll_flush(cx) } fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { self.get_mut().as_mut().poll_close(cx) } } macro_rules! delegate_async_write_to_stdio { () => { fn poll_write( mut self: Pin<&mut Self>, _: &mut Context<'_>, buf: &[u8], ) -> Poll> { Poll::Ready(io::Write::write(&mut *self, buf)) } fn poll_write_vectored( mut self: Pin<&mut Self>, _: &mut Context<'_>, bufs: &[IoSlice<'_>], ) -> Poll> { Poll::Ready(io::Write::write_vectored(&mut *self, bufs)) } fn poll_flush(mut self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll> { Poll::Ready(io::Write::flush(&mut *self)) } fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { self.poll_flush(cx) } }; } impl AsyncWrite for Vec { delegate_async_write_to_stdio!(); } macro_rules! deref_async_seek { () => { fn poll_seek( mut self: Pin<&mut Self>, cx: &mut Context<'_>, pos: SeekFrom, ) -> Poll> { Pin::new(&mut **self).poll_seek(cx, pos) } }; } impl AsyncSeek for Box { deref_async_seek!(); } impl AsyncSeek for &mut T { deref_async_seek!(); } impl

AsyncSeek for Pin

where P: DerefMut + Unpin, P::Target: AsyncSeek, { fn poll_seek( self: Pin<&mut Self>, cx: &mut Context<'_>, pos: SeekFrom, ) -> Poll> { self.get_mut().as_mut().poll_seek(cx, pos) } } macro_rules! deref_async_buf_read { () => { fn poll_fill_buf(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { Pin::new(&mut **self.get_mut()).poll_fill_buf(cx) } fn consume(mut self: Pin<&mut Self>, amt: usize) { Pin::new(&mut **self).consume(amt) } }; } impl AsyncBufRead for Box { deref_async_buf_read!(); } impl AsyncBufRead for &mut T { deref_async_buf_read!(); } impl

AsyncBufRead for Pin

where P: DerefMut + Unpin, P::Target: AsyncBufRead, { fn poll_fill_buf(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { self.get_mut().as_mut().poll_fill_buf(cx) } fn consume(self: Pin<&mut Self>, amt: usize) { self.get_mut().as_mut().consume(amt) } } macro_rules! delegate_async_buf_read_to_stdio { () => { fn poll_fill_buf(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll> { Poll::Ready(io::BufRead::fill_buf(self.get_mut())) } fn consume(self: Pin<&mut Self>, amt: usize) { io::BufRead::consume(self.get_mut(), amt) } }; } impl AsyncBufRead for &[u8] { delegate_async_buf_read_to_stdio!(); } } #[cfg(feature = "std")] pub use self::if_std::*;