DirtyHairy/async-mutex

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1430 stars · 70 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A TypeScript library providing mutex and semaphore primitives for synchronizing asynchronous JavaScript workflows. Locking returns a promise that resolves when the resource becomes available, preventing race conditions in single-threaded async code.

Use cases

• serialize access to a shared async resource in JavaScript
• limit concurrent requests in a web crawler
• prevent race conditions when exchanging messages with a web worker
• control parallelism of async tasks with a semaphore
• guard async workflows against reentrant calls

When to choose

• you need promise-based locking for async/await code
• you want to cap the number of concurrent async operations
• you need a tiny, dependency-free synchronization primitive in Node or the browser

When to avoid

• you need true multi-threaded synchronization (use worker threads with Atomics)
• your code is fully synchronous and single-threaded without interleaving
• you need distributed locking across processes or machines

Facets

library · maturity stable

concurrency developer-tools developer-tools web-development browser cross-platform mutex semaphore async typescript synchronization promise-based javascript nodejs

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