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guardian

v1.3.0 Growing

Provides owned mutex guards for refcounted mutexes.

MIT OR Apache-2.0 Edition 2021 MSRV 1.56.0
Concurrency #mutex#synchronization#rc#locks

Quick Verdict

  • Not updated for 1+ year
  • Stable API (1.x for 10+ years)
  • Trusted by 177 crates
  • Tiny footprint (15KB, 0 deps)
  • Permissive license (MIT OR Apache-2.0)

Security

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Downloads
2.7M
Dependents
177
Releases
8
Size
15KB

Deep Insights

📊
Steady growth

451.5K downloads in the last 30 days (15.0K/day), up 3% from the previous period.

🔗
Moderate adoption

177 crates depend on guardian. Reasonable ecosystem adoption, though not yet a core dependency.

👤
Prolific maintainer

The primary maintainer publishes 93 crates. This suggests deep Rust expertise and long-term commitment to the ecosystem.

Stable for 10+ years

The API has been stable (1.x) for over 10 years with 8 releases. This level of maturity means you can depend on it without worrying about breaking changes.

🪶
Zero dependencies

guardian has no external dependencies — minimal supply chain risk and fast compile times.

📐
Compact crate

At 15KB, guardian is lightweight. Small crate size correlates with focused, well-scoped functionality.

🌟
Used by top crates

Notable dependents include reactive_graph, reactive_stores, surrealkv, key-mutex, urcu2. When high-quality crates choose guardian, it's a strong quality signal.

Health Breakdown

Maintenance 5/25

Recency, release consistency, active ratio

Quality 21/25

Yanked ratio, deps, size, maturity, features

Community 11/20

Reverse deps, ownership, ecosystem

Popularity 8/15

Downloads, momentum, growth trend

Documentation 12/15

Docs, repo, license, metadata

Download Trend

Daily downloads · last 90 days
12K/day avg-12%
010K20K30K4/265/146/16/197/77/24

Top Dependents

Version Adoption

v1.3.0
93%
v1.2.0
6%
v1.1.0
0%
v1.0.1
0%
v1.0.2
0%

Release Timeline

8 releasessince 2016
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2016
1
2017
2
2018
1
2019
2020
2021
2022
1
2023
1
2024
1
2025
1
2026
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More

README

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Maintainers

Dependencies
0
direct dependencies
Dependents
177
crates depend on guardian

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