https://github.com/sherifabdlnaby/semaphore

A fork of golang/x/sync/semaphore that is also resizable in runtime.
https://github.com/sherifabdlnaby/semaphore

go resizable semaphore semaphore-pattern

Last synced: about 18 hours ago
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A fork of golang/x/sync/semaphore that is also resizable in runtime.

• Host: GitHub
• URL: https://github.com/sherifabdlnaby/semaphore
• Owner: sherifabdlnaby
• License: bsd-3-clause
• Created: 2019-01-17T06:39:09.000Z (about 6 years ago)
• Default Branch: master
• Last Pushed: 2019-03-04T01:00:23.000Z (almost 6 years ago)
• Last Synced: 2025-02-01T01:51:19.518Z (12 days ago)
• Topics: go, resizable, semaphore, semaphore-pattern
• Language: Go
• Homepage:
• Size: 43.9 KB
• Stars: 3
• Watchers: 3
• Forks: 1
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Semaphore

[![](https://godoc.org/github.com/sherifabdlnaby/semaphore?status.svg)](http://godoc.org/github.com/sherifabdlnaby/semaphore)

[![Build Status](https://travis-ci.org/sherifabdlnaby/semaphore.svg?branch=master)](https://travis-ci.org/sherifabdlnaby/semaphore)

[![codecov](https://codecov.io/gh/Sherifabdlnaby/semaphore/branch/resizable-semaphore/graph/badge.svg)](https://codecov.io/gh/Sherifabdlnaby/semaphore)

[![License](https://img.shields.io/badge/License-BSD%203--Clause-blue.svg)](https://opensource.org/licenses/BSD-3-Clause)

A fork of `golang/x/sync/semaphore` that is also **resizable**.

----

This fork adds the ability to resize the semaphore in a concurrent-safe way.

- Use `semaphore.Resize(N)` to resize the semaphore to a new absolute value `N`

- #### Example

    ```go

    sem := semaphore.NewWeighted(5)     // Semaphore size = 5

    result1 := sem.TryAcquire(10)       // returns false.

    sem.Resize(15)                      // Semaphore size now = 10

    result2 := sem.TryAcquire(10)       // returns true.

    fmt.Println(result1,result2)        // prints false \n true  

    ```

- Added resize functionality has **no impact on the semaphore performance** according to benchmarks.

- Tests for the newly added `Resize()` was also added.