https://github.com/mbuesch/rangelockrs
Rust: Range lock for std::vec::Vec
https://github.com/mbuesch/rangelockrs
lock multithreading mutex vec
Last synced: 7 months ago
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Rust: Range lock for std::vec::Vec
- Host: GitHub
- URL: https://github.com/mbuesch/rangelockrs
- Owner: mbuesch
- License: other
- Created: 2022-05-21T14:59:30.000Z (about 4 years ago)
- Default Branch: master
- Last Pushed: 2024-07-28T19:31:57.000Z (almost 2 years ago)
- Last Synced: 2025-04-02T02:31:02.562Z (about 1 year ago)
- Topics: lock, multithreading, mutex, vec
- Language: Rust
- Homepage: https://bues.ch/cgit/rangelockrs.git/
- Size: 97.7 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.rst
- License: LICENSE-APACHE
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README
range-lock - Multithread range lock for Vec
===========================================
`Project home `_
`Git repository `_
`Github repository `_
This crate provides locks/mutexes for multi-threaded access to a single Vec instance.
Any thread can request exclusive access to a slice of the Vec.
Such access is granted, if no other thread is simultaneously holding the permission to access an overlapping slice.
Usage
=====
Add this to your Cargo.toml:
.. code:: toml
[dependencies]
range-lock = "0.2"
VecRangeLock example usage
--------------------------
General purpose VecRangeLock:
.. code:: rust
use range_lock::VecRangeLock;
use std::sync::Arc;
use std::thread;
let lock = Arc::new(VecRangeLock::new(vec![1, 2, 3, 4, 5]));
thread::spawn(move || {
let mut guard = lock.try_lock(2..4).expect("Failed to lock range 2..4");
assert_eq!(guard[0], 3);
guard[0] = 10;
});
RepVecRangeLock example usage
-----------------------------
The RepVecRangeLock is a restricted range lock, that provides access to interleaved patterns of slices to the threads.
Locking a RepVecRangeLock is more lightweight than locking a VecRangeLock.
The threads can not freely choose slice ranges, but only choose a repeating slice pattern by specifying a pattern offset.
Please see the example below.
.. code:: rust
use range_lock::RepVecRangeLock;
use std::sync::Arc;
use std::thread;
let data = vec![1, 2, 3, // <- cycle 0
4, 5, 6]; // <- cycle 1
// ^ ^ ^
// | | |
// | | offset-2
// offset-0 offset-1
let lock = Arc::new(RepVecRangeLock::new(data,
1, // slice_len: Each slice has 1 element.
3)); // cycle_len: Each cycle has 3 slices (offsets).
thread::spawn(move || {
// Lock slice offset 1:
let mut guard = lock.try_lock(1).expect("Failed to lock offset.");
assert_eq!(guard[0][0], 2); // Cycle 0, Slice element 0
assert_eq!(guard[1][0], 5); // Cycle 1, Slice element 0
guard[0][0] = 20; // Cycle 0, Slice element 0
guard[1][0] = 50; // Cycle 1, Slice element 0
});
TODOs for future releases
=========================
The following new features might be candidates for future releases:
* Sleeping lock, in case of lock contention.
* Add support for arrays.
License
=======
Copyright (c) 2021-2023 Michael Büsch
Licensed under the Apache License version 2.0 or the MIT license, at your option.