DSemaphoreNet 1.0.0

.NET Standard 2.1
dotnet add package DSemaphoreNet --version 1.0.0
NuGet\Install-Package DSemaphoreNet -Version 1.0.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="DSemaphoreNet" Version="1.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add DSemaphoreNet --version 1.0.0
#r "nuget: DSemaphoreNet, 1.0.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install DSemaphoreNet as a Cake Addin
#addin nuget:?package=DSemaphoreNet&version=1.0.0

// Install DSemaphoreNet as a Cake Tool
#tool nuget:?package=DSemaphoreNet&version=1.0.0


A distributed semaphore based on Redis.

See RedisLabs: Fair semaphores


Create a semaphore factory

  • connectionMultiplexer - required, Inter-related group of connections to redis servers
  • redisDatabaseId optional, The ID of the database (default -1).
var connection = ConnectionMultiplexer.Connect("");
using (var semaphoreFactory = DSemaphoreFactory.Create(connection))
  // ...

Create a semaphore

semaphoreFactory.CreateSemaphore(string semaphoreName, int maxCount, TimeSpan? retryTime = null)
  • semaphoreName - required, Name of the semaphore
  • maxCount - required, The number of requests for the semaphore that can be granted concurrently
  • retryTime optional, How long to wait between retries when trying to acquire a lock. (default 10ms and it cannot be less than this value)
int maxCount = 5;
await using (var semaphore = semaphoreFactory.CreateSemaphore("foo", maxCount))
    foreach (var entity in collection)
       // ...

Wait an acquisition

WaitAsync(TimeSpan timeout, string id = null, CancellationToken cancellationToken = default)
  • timeout - required, observation time interval, after the delay has passed the method returns false. This value is important to prevent dead acquisition requests
  • id - optional, Id of the semaphore context
  • cancellationToken optional,
var timeout = TimeSpan.FromSeconds(30);
if (await semaphore.WaitAsync(timeout))
    // an action ...


This project is licensed under the MIT License - see the LICENSE.md file for details

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed. 
.NET Core netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.1 is compatible. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

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Version Downloads Last updated
1.0.0 411 8/14/2020