mirror of https://github.com/smol-rs/blocking
Initial commit
This commit is contained in:
commit
43b1991fc8
|
@ -0,0 +1 @@
|
|||
github: stjepang
|
|
@ -0,0 +1,44 @@
|
|||
name: Build and test
|
||||
|
||||
on:
|
||||
push:
|
||||
branches:
|
||||
- master
|
||||
pull_request:
|
||||
|
||||
jobs:
|
||||
build_and_test:
|
||||
runs-on: ${{ matrix.os }}
|
||||
strategy:
|
||||
fail-fast: false
|
||||
matrix:
|
||||
os: ubuntu-latest
|
||||
rust: [nightly, beta, stable]
|
||||
steps:
|
||||
- uses: actions/checkout@v2
|
||||
|
||||
- name: Set current week of the year in environnement
|
||||
if: startsWith(matrix.os, 'ubuntu') || startsWith(matrix.os, 'macOS')
|
||||
run: echo "::set-env name=CURRENT_WEEK::$(date +%V)"
|
||||
|
||||
- name: Set current week of the year in environnement
|
||||
if: startsWith(matrix.os, 'windows')
|
||||
run: echo "::set-env name=CURRENT_WEEK::$(Get-Date -UFormat %V)"
|
||||
|
||||
- name: Install latest ${{ matrix.rust }}
|
||||
uses: actions-rs/toolchain@v1
|
||||
with:
|
||||
toolchain: ${{ matrix.rust }}
|
||||
profile: minimal
|
||||
override: true
|
||||
|
||||
- name: Run cargo check
|
||||
uses: actions-rs/cargo@v1
|
||||
with:
|
||||
command: check
|
||||
args: --all --benches --bins --examples --tests --all-features
|
||||
|
||||
- name: Run cargo test
|
||||
uses: actions-rs/cargo@v1
|
||||
with:
|
||||
command: test
|
|
@ -0,0 +1,59 @@
|
|||
name: Lint
|
||||
|
||||
on:
|
||||
push:
|
||||
branches:
|
||||
- master
|
||||
pull_request:
|
||||
|
||||
jobs:
|
||||
clippy:
|
||||
runs-on: ubuntu-latest
|
||||
steps:
|
||||
- uses: actions/checkout@v2
|
||||
|
||||
- name: Set current week of the year in environnement
|
||||
run: echo "::set-env name=CURRENT_WEEK::$(date +%V)"
|
||||
|
||||
- name: Cache .rustup
|
||||
uses: actions/cache@v1
|
||||
with:
|
||||
path: ~/.rustup
|
||||
key: rustup-${{ env.CURRENT_WEEK }}-clippy
|
||||
|
||||
- name: Cache cargo binaries
|
||||
uses: actions/cache@v1
|
||||
with:
|
||||
path: ~/.cargo/bin
|
||||
key: cargo-binaries-${{ env.CURRENT_WEEK }}-clippy
|
||||
|
||||
- uses: actions-rs/toolchain@v1
|
||||
with:
|
||||
toolchain: stable
|
||||
profile: minimal
|
||||
components: clippy
|
||||
- uses: actions-rs/clippy-check@v1
|
||||
with:
|
||||
token: ${{ secrets.GITHUB_TOKEN }}
|
||||
args: --all-features
|
||||
loc:
|
||||
runs-on: ubuntu-latest
|
||||
steps:
|
||||
- uses: actions/checkout@v2
|
||||
|
||||
- name: Set current week of the year in environnement
|
||||
run: echo "::set-env name=CURRENT_WEEK::$(date +%V)"
|
||||
|
||||
- name: Cache cargo binaries
|
||||
uses: actions/cache@v1
|
||||
with:
|
||||
path: ~/.cargo/bin
|
||||
key: cargo-binaries-${{ env.CURRENT_WEEK }}-loc
|
||||
|
||||
- name: Install cargo-count
|
||||
run: cargo install cargo-count || true
|
||||
|
||||
- name: Run cargo count
|
||||
# '-a --exclude=$(cat .gitignore)' necessary to work around:
|
||||
# https://github.com/kbknapp/cargo-count/issues/36
|
||||
run: cargo count -l rs -a --exclude=$(cat .gitignore) src
|
|
@ -0,0 +1,32 @@
|
|||
name: Security audit
|
||||
|
||||
on:
|
||||
push:
|
||||
branches:
|
||||
- master
|
||||
pull_request:
|
||||
|
||||
jobs:
|
||||
security_audit:
|
||||
runs-on: ubuntu-latest
|
||||
steps:
|
||||
- uses: actions/checkout@v2
|
||||
|
||||
- name: Set current week of the year in environnement
|
||||
run: echo "::set-env name=CURRENT_WEEK::$(date +%V)"
|
||||
|
||||
- name: Cache .rustup
|
||||
uses: actions/cache@v1
|
||||
with:
|
||||
path: ~/.rustup
|
||||
key: rustup-${{ env.CURRENT_WEEK }}-security_audit
|
||||
|
||||
- name: Cache cargo binaries
|
||||
uses: actions/cache@v1
|
||||
with:
|
||||
path: ~/.cargo/bin
|
||||
key: cargo-binaries-${{ env.CURRENT_WEEK }}-security_audit
|
||||
|
||||
- uses: actions-rs/audit-check@v1
|
||||
with:
|
||||
token: ${{ secrets.GITHUB_TOKEN }}
|
|
@ -0,0 +1,2 @@
|
|||
/target
|
||||
Cargo.lock
|
|
@ -0,0 +1,21 @@
|
|||
[package]
|
||||
name = "blocking"
|
||||
version = "0.2.0"
|
||||
authors = ["Stjepan Glavina <stjepang@gmail.com>"]
|
||||
edition = "2018"
|
||||
description = "An executor for isolating blocking I/O in async programs"
|
||||
license = "Apache-2.0 OR MIT"
|
||||
repository = "https://github.com/stjepang/blocking"
|
||||
homepage = "https://github.com/stjepang/blocking"
|
||||
documentation = "https://docs.rs/blocking"
|
||||
keywords = ["async", "file", "stdio", "stdin", "process"]
|
||||
categories = ["asynchronous", "concurrency"]
|
||||
readme = "README.md"
|
||||
|
||||
[dependencies]
|
||||
async-task = "3.0.0"
|
||||
futures = { version = "0.3.4", default-features = false, features = ["std"] }
|
||||
once_cell = "1.3.1"
|
||||
|
||||
[dev-dependencies]
|
||||
futures = { version = "0.3.4", default-features = false, features = ["executor"] }
|
|
@ -0,0 +1,201 @@
|
|||
Apache License
|
||||
Version 2.0, January 2004
|
||||
http://www.apache.org/licenses/
|
||||
|
||||
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
|
||||
|
||||
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|
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|
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|
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|
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|
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|
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|
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|
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@ -0,0 +1,23 @@
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Permission is hereby granted, free of charge, to any
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|
@ -0,0 +1,103 @@
|
|||
# blocking
|
||||
|
||||
[![Build](https://github.com/stjepang/blocking/workflows/Build%20and%20test/badge.svg)](
|
||||
https://github.com/stjepang/blocking/actions)
|
||||
[![Coverage Status](https://coveralls.io/repos/github/stjepang/blocking/badge.svg?branch=master)](
|
||||
https://coveralls.io/github/stjepang/blocking?branch=master)
|
||||
[![License](https://img.shields.io/badge/license-MIT%2FApache--2.0-blue.svg)](
|
||||
https://github.com/stjepang/blocking)
|
||||
[![Cargo](https://img.shields.io/crates/v/blocking.svg)](
|
||||
https://crates.io/crates/blocking)
|
||||
[![Documentation](https://docs.rs/blocking/badge.svg)](
|
||||
https://docs.rs/blocking)
|
||||
[![Chat](https://img.shields.io/discord/701824908866617385.svg?logo=discord)](
|
||||
https://discord.gg/x6m5Vvt)
|
||||
|
||||
An executor for isolating blocking I/O in async programs.
|
||||
|
||||
Sometimes there's no way to avoid blocking I/O. Consider files or stdin, which have weak async
|
||||
support on modern operating systems. While [IOCP], [AIO], and [io_uring] are possible
|
||||
solutions, they're not always available or ideal.
|
||||
|
||||
Since blocking is not allowed inside futures, we must move blocking I/O onto a special
|
||||
executor provided by this crate. On this executor, futures are allowed to "cheat" and block
|
||||
without any restrictions. The executor dynamically spawns and stops threads depending on the
|
||||
current number of running futures.
|
||||
|
||||
Note that there is a limit on the number of active threads. Once that limit is hit, a running
|
||||
task has to complete or yield before other tasks get a chance to continue running. When a
|
||||
thread is idle, it waits for the next task or shuts down after a certain timeout.
|
||||
|
||||
[IOCP]: https://en.wikipedia.org/wiki/Input/output_completion_port
|
||||
[AIO]: http://man7.org/linux/man-pages/man2/io_submit.2.html
|
||||
[io_uring]: https://lwn.net/Articles/776703/
|
||||
|
||||
# Examples
|
||||
|
||||
Spawn a blocking future with [`Blocking::spawn()`]:
|
||||
|
||||
```rust
|
||||
use blocking::Blocking;
|
||||
use std::fs;
|
||||
|
||||
# futures::executor::block_on(async {
|
||||
let contents = Blocking::spawn(async { fs::read_to_string("file.txt") }).await?;
|
||||
# std::io::Result::Ok(()) });
|
||||
```
|
||||
|
||||
Or do the same with the [`blocking!`] macro:
|
||||
|
||||
```rust
|
||||
use blocking::blocking;
|
||||
use std::fs;
|
||||
|
||||
# futures::executor::block_on(async {
|
||||
let contents = blocking!(fs::read_to_string("file.txt"))?;
|
||||
# std::io::Result::Ok(()) });
|
||||
```
|
||||
|
||||
Read a file and pipe its contents to stdout:
|
||||
|
||||
```rust
|
||||
use blocking::Blocking;
|
||||
use std::fs::File;
|
||||
use std::io::stdout;
|
||||
|
||||
# futures::executor::block_on(async {
|
||||
let input = Blocking::new(File::open("file.txt")?);
|
||||
let mut output = Blocking::new(stdout());
|
||||
|
||||
futures::io::copy(input, &mut output).await?;
|
||||
# std::io::Result::Ok(()) });
|
||||
```
|
||||
|
||||
Iterate over the contents of a directory:
|
||||
|
||||
```rust
|
||||
use blocking::Blocking;
|
||||
use futures::prelude::*;
|
||||
use std::fs;
|
||||
|
||||
# futures::executor::block_on(async {
|
||||
let mut dir = Blocking::new(fs::read_dir(".")?);
|
||||
|
||||
while let Some(item) = dir.next().await {
|
||||
println!("{}", item?.file_name().to_string_lossy());
|
||||
}
|
||||
# std::io::Result::Ok(()) });
|
||||
```
|
||||
|
||||
## License
|
||||
|
||||
Licensed under either of
|
||||
|
||||
* Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
|
||||
* MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
|
||||
|
||||
at your option.
|
||||
|
||||
#### Contribution
|
||||
|
||||
Unless you explicitly state otherwise, any contribution intentionally submitted
|
||||
for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
|
||||
dual licensed as above, without any additional terms or conditions.
|
|
@ -0,0 +1,28 @@
|
|||
use std::fs::File;
|
||||
use std::io;
|
||||
use std::io::prelude::*;
|
||||
use std::time::Instant;
|
||||
|
||||
use blocking::Blocking;
|
||||
use futures::prelude::*;
|
||||
|
||||
fn main() -> io::Result<()> {
|
||||
futures::executor::block_on(async {
|
||||
let start = Instant::now();
|
||||
let mut file = File::open("big.txt")?;
|
||||
let mut contents = Vec::<u8>::new();
|
||||
|
||||
// file.read_to_end(&mut contents)?;
|
||||
// Blocking::new(file).read_to_end(&mut contents).await?;
|
||||
// smol::reader(file).read_to_end(&mut contents).await?;
|
||||
|
||||
let mut file2 = File::create("big2.txt")?;
|
||||
// Blocking::new(file2).write_all(&contents).await?;
|
||||
futures::io::copy(Blocking::new(file), &mut Blocking::new(file2)).await?;
|
||||
|
||||
dbg!(contents.len());
|
||||
dbg!(start.elapsed());
|
||||
|
||||
Ok(())
|
||||
})
|
||||
}
|
|
@ -0,0 +1,29 @@
|
|||
//! Lists directory contents.
|
||||
//!
|
||||
//! Run with:
|
||||
//!
|
||||
//! ```
|
||||
//! cargo run --example ls .
|
||||
//! ```
|
||||
|
||||
use std::fs;
|
||||
use std::io;
|
||||
use std::env;
|
||||
|
||||
use blocking::Blocking;
|
||||
use futures::executor::block_on;
|
||||
use futures::prelude::*;
|
||||
|
||||
fn main() -> io::Result<()> {
|
||||
let path = env::args().nth(1).unwrap_or(".".into());
|
||||
|
||||
block_on(async {
|
||||
let mut dir = Blocking::new(fs::read_dir(path)?);
|
||||
|
||||
while let Some(item) = dir.next().await {
|
||||
println!("{}", item?.file_name().to_string_lossy());
|
||||
}
|
||||
|
||||
Ok(())
|
||||
})
|
||||
}
|
File diff suppressed because it is too large
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Reference in New Issue