This is a Kotlin Multiplatform line-by-line transliteration port of Amanieu/thread_local-rs.

Original Project: This port is based on Amanieu/thread_local-rs. All design credit and project intent belong to the upstream authors; this repository is a faithful port to Kotlin Multiplatform with no behavioural changes intended.

This is an in-progress port. The goal is feature parity with the upstream Rust crate while providing a native Kotlin Multiplatform API. Every Kotlin file carries a // port-lint: source <path> header naming its upstream Rust counterpart so the AST-distance tool can track provenance.

The text below is reproduced and lightly edited from https://github.com/Amanieu/thread_local-rs. It is the upstream project's own description and remains under the upstream authors' authorship; links have been rewritten to absolute upstream URLs so they continue to resolve from this repository.

This library provides the ThreadLocal type which allow a separate copy of an object to be used for each thread. This allows for per-object thread-local storage, unlike the standard library's thread_local! macro which only allows static thread-local storage.

Documentation

Add this to your Cargo.toml:

[dependencies]
thread_local = "1.1"

This crate's minimum supported Rust version (MSRV) is 1.63.0.

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

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.

dependencies {
    implementation("io.github.kotlinmania:threadlocal-kotlin:0.3.1")
}

./gradlew build
./gradlew test

• JVM (Java 8+)
• macOS arm64
• Linux x64
• Windows mingw-x64
• iOS arm64 / simulator-arm64 (Swift export + XCFramework)
• JS (browser + Node.js)
• Wasm-JS (browser + Node.js)
• Android (API 24+)

See AGENTS.md and CLAUDE.md for translator discipline, port-lint header convention, and Rust → Kotlin idiom mapping.

This Kotlin port is distributed under the same Apache-2.0 license as the upstream Amanieu/thread_local-rs. See LICENSE (and any sibling LICENSE-* / NOTICE files mirrored from upstream) for the full text.

Original work copyrighted by the thread_local-rs authors.
Kotlin port: Copyright (c) 2026 Sydney Renee and The Solace Project.

Thanks to the Amanieu/thread_local-rs maintainers and contributors for the original Rust implementation. This port reproduces their work in Kotlin Multiplatform; bug reports about upstream design or behavior should go to the upstream repository.