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{"files":{"CHANGELOG.md":"87ba1b0829aea990ab3d7f2a30899c9d5e1067fba07c2abefae1fd004f2a5982","Cargo.toml":"9411d90fcc5e6badf13c9b3c133f2330b2b900dc4c851cfea36b8035cad7ca40","LICENSE-APACHE":"6f712474a3e3be1386d2d0c29449850ea788da64d35cff0fc8799acf741e9ecd","LICENSE-MIT":"5734ed989dfca1f625b40281ee9f4530f91b2411ec01cb748223e7eb87e201ab","README.md":"dbe15407a26bdae7ecdcb376b8c62170104156f12c3c1ed8b121e9d6e763d63b","build-common.rs":"502cb7494549bed6fa10ac7bea36e880eeb60290dc69b679ac5c92b376469562","no_atomic.rs":"31a8276afd38e39987a169eeb02e9bed32670de5ca36d7eb74aab7e506cf9dc4","src/lib.rs":"27e0ffe5571c303464e8e30b6e2d486ccb342cb4293d49f282666e1f63fc39cc","tests/subcrates.rs":"bb9715e661d65bf9e61d41ad838f09dc531d624e705ab8650e1ee549a1e1feaf"},"package":"1137cd7e7fc0fb5d3c5a8678be38ec56e819125d8d7907411fe24ccb943faca8"}

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# Version 0.8.4
- Remove dependency on `cfg-if`. (#1072)
# Version 0.8.3
- Bump the minimum supported Rust version to 1.61. (#1037)
# Version 0.8.2
- Bump the minimum supported Rust version to 1.38. (#877)
# Version 0.8.1
- Support targets that do not have atomic CAS on stable Rust (#698)
# Version 0.8.0
- Bump the minimum supported Rust version to 1.36.
- Bump `crossbeam-channel` to `0.5`.
- Bump `crossbeam-deque` to `0.8`.
- Bump `crossbeam-epoch` to `0.9`.
- Bump `crossbeam-queue` to `0.3`.
- Bump `crossbeam-utils` to `0.8`.
# Version 0.7.3
- Fix breakage with nightly feature due to rust-lang/rust#65214.
- Bump `crossbeam-channel` to `0.4`.
- Bump `crossbeam-epoch` to `0.8`.
- Bump `crossbeam-queue` to `0.2`.
- Bump `crossbeam-utils` to `0.7`.
# Version 0.7.2
- Bump `crossbeam-channel` to `0.3.9`.
- Bump `crossbeam-epoch` to `0.7.2`.
- Bump `crossbeam-utils` to `0.6.6`.
# Version 0.7.1
- Bump `crossbeam-utils` to `0.6.5`.
# Version 0.7.0
- Remove `ArcCell`, `MsQueue`, and `TreiberStack`.
- Change the interface of `ShardedLock` to match `RwLock`.
- Add `SegQueue::len()`.
- Rename `SegQueue::try_pop()` to `SegQueue::pop()`.
- Change the return type of `SegQueue::pop()` to `Result`.
- Introduce `ArrayQueue`.
- Update dependencies.
# Version 0.6.0
- Update dependencies.
# Version 0.5.0
- Update `crossbeam-channel` to 0.3.
- Update `crossbeam-utils` to 0.6.
- Add `AtomicCell`, `SharedLock`, and `WaitGroup`.
# Version 0.4.1
- Fix a double-free bug in `MsQueue` and `SegQueue`.
# Version 0.4
- Switch to the new implementation of epoch-based reclamation in
[`crossbeam-epoch`](https://github.com/crossbeam-rs/crossbeam-epoch), fixing numerous bugs in the
old implementation. Its API is changed in a backward-incompatible way.
- Switch to the new implementation of `CachePadded` and scoped thread in
[`crossbeam-utils`](https://github.com/crossbeam-rs/crossbeam-utils). The scoped thread API is
changed in a backward-incompatible way.
- Switch to the new implementation of Chase-Lev deque in
[`crossbeam-deque`](https://github.com/crossbeam-rs/crossbeam-deque). Its API is changed in a
backward-incompatible way.
- Export channel implemented in
[`crossbeam-channel`](https://github.com/crossbeam-rs/crossbeam-channel).
- Remove `AtomicOption`.
- Implement `Default` and `From` traits.
# Version 0.3
- Introduced `ScopedThreadBuilder` with the ability to name threads and set stack size
- `Worker` methods in the Chase-Lev deque don't require mutable access anymore
- Fixed a bug when unblocking `pop()` in `MsQueue`
- Implemented `Drop` for `MsQueue`, `SegQueue`, and `TreiberStack`
- Implemented `Default` for `TreiberStack`
- Added `is_empty` to `SegQueue`
- Renamed `mem::epoch` to `epoch`
- Other bug fixes
# Version 0.2
- Changed existing non-blocking `pop` methods to `try_pop`
- Added blocking `pop` support to Michael-Scott queue
- Added Chase-Lev work-stealing deque
# Version 0.1
- Added [epoch-based memory management](http://aturon.github.io/blog/2015/08/27/epoch/)
- Added Michael-Scott queue
- Added Segmented array queue

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# 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 = "2021"
rust-version = "1.61"
name = "crossbeam"
version = "0.8.4"
exclude = [
"/.*",
"/ci",
"/tools",
]
description = "Tools for concurrent programming"
homepage = "https://github.com/crossbeam-rs/crossbeam"
readme = "README.md"
keywords = [
"atomic",
"garbage",
"non-blocking",
"lock-free",
"rcu",
]
categories = [
"concurrency",
"memory-management",
"data-structures",
"no-std",
]
license = "MIT OR Apache-2.0"
repository = "https://github.com/crossbeam-rs/crossbeam"
[dependencies.crossbeam-channel]
version = "0.5.10"
optional = true
default-features = false
[dependencies.crossbeam-deque]
version = "0.8.4"
optional = true
default-features = false
[dependencies.crossbeam-epoch]
version = "0.9.17"
optional = true
default-features = false
[dependencies.crossbeam-queue]
version = "0.3.10"
optional = true
default-features = false
[dependencies.crossbeam-utils]
version = "0.8.18"
default-features = false
[dev-dependencies.rand]
version = "0.8"
[features]
alloc = [
"crossbeam-epoch/alloc",
"crossbeam-queue/alloc",
]
default = ["std"]
nightly = [
"crossbeam-epoch/nightly",
"crossbeam-utils/nightly",
"crossbeam-queue/nightly",
]
std = [
"alloc",
"crossbeam-channel/std",
"crossbeam-deque/std",
"crossbeam-epoch/std",
"crossbeam-queue/std",
"crossbeam-utils/std",
]

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Apache License
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END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
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The MIT License (MIT)
Copyright (c) 2019 The Crossbeam Project Developers
Permission is hereby granted, free of charge, to any
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# Crossbeam
[![Build Status](https://github.com/crossbeam-rs/crossbeam/workflows/CI/badge.svg)](
https://github.com/crossbeam-rs/crossbeam/actions)
[![License](https://img.shields.io/badge/license-MIT_OR_Apache--2.0-blue.svg)](
https://github.com/crossbeam-rs/crossbeam#license)
[![Cargo](https://img.shields.io/crates/v/crossbeam.svg)](
https://crates.io/crates/crossbeam)
[![Documentation](https://docs.rs/crossbeam/badge.svg)](
https://docs.rs/crossbeam)
[![Rust 1.61+](https://img.shields.io/badge/rust-1.61+-lightgray.svg)](
https://www.rust-lang.org)
[![chat](https://img.shields.io/discord/569610676205781012.svg?logo=discord)](https://discord.com/invite/JXYwgWZ)
This crate provides a set of tools for concurrent programming:
#### Atomics
* [`AtomicCell`], a thread-safe mutable memory location.<sup>(no_std)</sup>
* [`AtomicConsume`], for reading from primitive atomic types with "consume" ordering.<sup>(no_std)</sup>
#### Data structures
* [`deque`], work-stealing deques for building task schedulers.
* [`ArrayQueue`], a bounded MPMC queue that allocates a fixed-capacity buffer on construction.<sup>(alloc)</sup>
* [`SegQueue`], an unbounded MPMC queue that allocates small buffers, segments, on demand.<sup>(alloc)</sup>
#### Memory management
* [`epoch`], an epoch-based garbage collector.<sup>(alloc)</sup>
#### Thread synchronization
* [`channel`], multi-producer multi-consumer channels for message passing.
* [`Parker`], a thread parking primitive.
* [`ShardedLock`], a sharded reader-writer lock with fast concurrent reads.
* [`WaitGroup`], for synchronizing the beginning or end of some computation.
#### Utilities
* [`Backoff`], for exponential backoff in spin loops.<sup>(no_std)</sup>
* [`CachePadded`], for padding and aligning a value to the length of a cache line.<sup>(no_std)</sup>
* [`scope`], for spawning threads that borrow local variables from the stack.
*Features marked with <sup>(no_std)</sup> can be used in `no_std` environments.*<br/>
*Features marked with <sup>(alloc)</sup> can be used in `no_std` environments, but only if `alloc`
feature is enabled.*
[`AtomicCell`]: https://docs.rs/crossbeam/*/crossbeam/atomic/struct.AtomicCell.html
[`AtomicConsume`]: https://docs.rs/crossbeam/*/crossbeam/atomic/trait.AtomicConsume.html
[`deque`]: https://docs.rs/crossbeam/*/crossbeam/deque/index.html
[`ArrayQueue`]: https://docs.rs/crossbeam/*/crossbeam/queue/struct.ArrayQueue.html
[`SegQueue`]: https://docs.rs/crossbeam/*/crossbeam/queue/struct.SegQueue.html
[`channel`]: https://docs.rs/crossbeam/*/crossbeam/channel/index.html
[`Parker`]: https://docs.rs/crossbeam/*/crossbeam/sync/struct.Parker.html
[`ShardedLock`]: https://docs.rs/crossbeam/*/crossbeam/sync/struct.ShardedLock.html
[`WaitGroup`]: https://docs.rs/crossbeam/*/crossbeam/sync/struct.WaitGroup.html
[`epoch`]: https://docs.rs/crossbeam/*/crossbeam/epoch/index.html
[`Backoff`]: https://docs.rs/crossbeam/*/crossbeam/utils/struct.Backoff.html
[`CachePadded`]: https://docs.rs/crossbeam/*/crossbeam/utils/struct.CachePadded.html
[`scope`]: https://docs.rs/crossbeam/*/crossbeam/fn.scope.html
## Crates
The main `crossbeam` crate just [re-exports](src/lib.rs) tools from
smaller subcrates:
* [`crossbeam-channel`](crossbeam-channel)
provides multi-producer multi-consumer channels for message passing.
* [`crossbeam-deque`](crossbeam-deque)
provides work-stealing deques, which are primarily intended for building task schedulers.
* [`crossbeam-epoch`](crossbeam-epoch)
provides epoch-based garbage collection for building concurrent data structures.
* [`crossbeam-queue`](crossbeam-queue)
provides concurrent queues that can be shared among threads.
* [`crossbeam-utils`](crossbeam-utils)
provides atomics, synchronization primitives, scoped threads, and other utilities.
There is one more experimental subcrate that is not yet included in `crossbeam`:
* [`crossbeam-skiplist`](crossbeam-skiplist)
provides concurrent maps and sets based on lock-free skip lists.
## Usage
Add this to your `Cargo.toml`:
```toml
[dependencies]
crossbeam = "0.8"
```
## Compatibility
Crossbeam supports stable Rust releases going back at least six months,
and every time the minimum supported Rust version is increased, a new minor
version is released. Currently, the minimum supported Rust version is 1.61.
## Contributing
Crossbeam welcomes contribution from everyone in the form of suggestions, bug reports,
pull requests, and feedback. 💛
If you need ideas for contribution, there are several ways to get started:
* Found a bug or have a feature request?
[Submit an issue](https://github.com/crossbeam-rs/crossbeam/issues/new)!
* Issues and PRs labeled with
[feedback wanted](https://github.com/crossbeam-rs/crossbeam/issues?utf8=%E2%9C%93&q=is%3Aopen+sort%3Aupdated-desc+label%3A%22feedback+wanted%22+)
need feedback from users and contributors.
* Issues labeled with
[good first issue](https://github.com/crossbeam-rs/crossbeam/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc+label%3A%22good+first+issue%22)
are relatively easy starter issues.
#### RFCs
We also have the [RFCs](https://github.com/crossbeam-rs/rfcs) repository for more
high-level discussion, which is the place where we brainstorm ideas and propose
substantial changes to Crossbeam.
You are welcome to participate in any open
[issues](https://github.com/crossbeam-rs/rfcs/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc)
or
[pull requests](https://github.com/crossbeam-rs/rfcs/pulls?q=is%3Apr+is%3Aopen+sort%3Aupdated-desc).
#### Learning resources
If you'd like to learn more about concurrency and non-blocking data structures, there's a
list of learning resources in our [wiki](https://github.com/crossbeam-rs/rfcs/wiki),
which includes relevant blog posts, papers, videos, and other similar projects.
Another good place to visit is [merged RFCs](https://github.com/crossbeam-rs/rfcs/tree/master/text).
They contain elaborate descriptions and rationale for features we've introduced to
Crossbeam, but keep in mind that some of the written information is now out of date.
#### Conduct
The Crossbeam project adheres to the
[Rust Code of Conduct](https://www.rust-lang.org/policies/code-of-conduct).
This describes the minimum behavior expected from all contributors.
## 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.
Some Crossbeam subcrates have additional licensing notices.
Take a look at other readme files in this repository for more information.
#### 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.

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// The target triplets have the form of 'arch-vendor-system'.
//
// When building for Linux (e.g. the 'system' part is
// 'linux-something'), replace the vendor with 'unknown'
// so that mapping to rust standard targets happens correctly.
fn convert_custom_linux_target(target: String) -> String {
let mut parts: Vec<&str> = target.split('-').collect();
let system = parts.get(2);
if system == Some(&"linux") {
parts[1] = "unknown";
};
parts.join("-")
}

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// This file is @generated by no_atomic.sh.
// It is not intended for manual editing.
const NO_ATOMIC: &[&str] = &[
"bpfeb-unknown-none",
"bpfel-unknown-none",
"mipsel-sony-psx",
"msp430-none-elf",
"riscv32i-unknown-none-elf",
"riscv32im-unknown-none-elf",
"riscv32imc-unknown-none-elf",
];

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//! Tools for concurrent programming.
//!
//! ## Atomics
//!
//! * [`AtomicCell`], a thread-safe mutable memory location.
//! * [`AtomicConsume`], for reading from primitive atomic types with "consume" ordering.
//!
//! ## Data structures
//!
//! * [`deque`], work-stealing deques for building task schedulers.
//! * [`ArrayQueue`], a bounded MPMC queue that allocates a fixed-capacity buffer on construction.
//! * [`SegQueue`], an unbounded MPMC queue that allocates small buffers, segments, on demand.
//!
//! ## Memory management
//!
//! * [`epoch`], an epoch-based garbage collector.
//!
//! ## Thread synchronization
//!
//! * [`channel`], multi-producer multi-consumer channels for message passing.
//! * [`Parker`], a thread parking primitive.
//! * [`ShardedLock`], a sharded reader-writer lock with fast concurrent reads.
//! * [`WaitGroup`], for synchronizing the beginning or end of some computation.
//!
//! ## Utilities
//!
//! * [`Backoff`], for exponential backoff in spin loops.
//! * [`CachePadded`], for padding and aligning a value to the length of a cache line.
//! * [`scope`], for spawning threads that borrow local variables from the stack.
//!
//! [`AtomicCell`]: atomic::AtomicCell
//! [`AtomicConsume`]: atomic::AtomicConsume
//! [`ArrayQueue`]: queue::ArrayQueue
//! [`SegQueue`]: queue::SegQueue
//! [`Parker`]: sync::Parker
//! [`ShardedLock`]: sync::ShardedLock
//! [`WaitGroup`]: sync::WaitGroup
//! [`Backoff`]: utils::Backoff
//! [`CachePadded`]: utils::CachePadded
#![doc(test(
no_crate_inject,
attr(
deny(warnings, rust_2018_idioms),
allow(dead_code, unused_assignments, unused_variables)
)
))]
#![warn(
missing_docs,
missing_debug_implementations,
rust_2018_idioms,
unreachable_pub
)]
#![cfg_attr(not(feature = "std"), no_std)]
pub use crossbeam_utils::atomic;
pub mod utils {
//! Miscellaneous utilities.
//!
//! * [`Backoff`], for exponential backoff in spin loops.
//! * [`CachePadded`], for padding and aligning a value to the length of a cache line.
pub use crossbeam_utils::Backoff;
pub use crossbeam_utils::CachePadded;
}
#[cfg(feature = "alloc")]
#[doc(inline)]
pub use {crossbeam_epoch as epoch, crossbeam_queue as queue};
#[cfg(feature = "std")]
#[doc(inline)]
pub use {
crossbeam_channel as channel, crossbeam_channel::select, crossbeam_deque as deque,
crossbeam_utils::sync,
};
#[cfg(feature = "std")]
#[cfg(not(crossbeam_loom))]
pub use crossbeam_utils::thread::{self, scope};

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third-party/vendor/crossbeam/tests/subcrates.rs vendored Normal file
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@ -0,0 +1,48 @@
//! Makes sure subcrates are properly re-exported.
use crossbeam::select;
#[test]
fn channel() {
let (s, r) = crossbeam::channel::bounded(1);
select! {
send(s, 0) -> res => res.unwrap(),
recv(r) -> res => assert!(res.is_ok()),
}
}
#[test]
fn deque() {
let w = crossbeam::deque::Worker::new_fifo();
w.push(1);
let _ = w.pop();
}
#[test]
#[cfg_attr(miri, ignore)] // Miri ICE: https://github.com/crossbeam-rs/crossbeam/pull/870#issuecomment-1189209073
fn epoch() {
crossbeam::epoch::pin();
}
#[test]
fn queue() {
let a = crossbeam::queue::ArrayQueue::new(10);
let _ = a.push(1);
let _ = a.pop();
}
#[test]
fn utils() {
crossbeam::utils::CachePadded::new(7);
crossbeam::scope(|scope| {
scope.spawn(|_| ());
})
.unwrap();
crossbeam::thread::scope(|scope| {
scope.spawn(|_| ());
})
.unwrap();
}