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mutex

4.1.0
4.1.0 4.0.0 3.0.6 3.0.5 3.0.4 3.0.3 3.0.2 3.0.1 3.0.0 2.0.0 1.3.3 1.3.2 1.3.1 1.2.3 1.1.3 1.1.2 1.1.1 1.1.0 1.0.2 1.0.1 1.0.0

This package implements a simple mutex as a GenServer. It allows to lock keys and handles locking multiple keys without deadlocks.

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CHANGELOG.md 

# Changelog



All notable changes to this project will be documented in this file.



## [4.1.0] - 2026-07-15



### 🚀 Features



- Grant released keys to waiters in FIFO order



### 🧪 Testing



- Added tests around waiters cleanup guarantees



## [4.0.0] - 2026-07-07



### 🚀 Features



- [**breaking**] Detect self-deadlocks in await functions and return LockError with owner pid from lock/2

- [**breaking**] Mutex.release now returns an error tuple on failures, added Mutex.release!



### 🐛 Bug Fixes



- Raise ArgumentError on duplicate keys in await_all instead of hanging forever

- Accept and log unexpected messsages in handle_info

- Skip liveness check for remote pids in whereis_name



### 🚜 Refactor



- Use single monitor for each client process



### 📚 Documentation



- Document await_all concurrency model

- Document ReleaseEror exception module



## [3.0.6] - 2026-07-04



### 📚 Documentation



- Enable ex_doc markdown formatter



## [3.0.5] - 2026-05-29



### ⚙️ Miscellaneous Tasks



- Fix compilation warnings for Elixir 1.20



## [3.0.4] - 2026-05-10



### ⚙️ Miscellaneous Tasks



- Maintenance release (deps, docs)



## [3.0.3] - 2026-02-03



### ⚙️ Miscellaneous Tasks



- Maintenance release



## [3.0.2] - 2025-10-16



### ⚙️ Miscellaneous Tasks



- Fixed Elixir 1.19 compilation warnings



## [3.0.1] - 2025-05-13



### 🐛 Bug Fixes



- Do not sleep  before notifying multiple waiters that a lock is available



### 🚜 Refactor



- Removed dead code



### ⚙️ Miscellaneous Tasks



- Update dependabot config (#8)

- Update CI config (#9)

- Fix dialyzer warning

- Update dependabot config (#15)

- Update Elixir Github workflow (#21)



## [3.0.0] - 2024-10-12



### 🚀 Features



- Added support for process name registration

- [**breaking**] Removed mutex metadata

- [**breaking**] Options in start_link must now always be a Keyword

- Removed need to cleanup state every N seconds

- Added the give_away function to transfer lock ownership

- Renamed 'under' functions to 'with_lock'

- [**breaking**] Releasing a lock is now a synchronous operation



### 🧪 Testing



- Splitted tests for speed



### ⚙️ Miscellaneous Tasks



- Fix github workflow for tests



## [2.0.0] - 2024-01-25



### ⚙️ Miscellaneous Tasks



- Upgrade to elixir version 1.15



## [1.0.2] - 2018-03-02