DSemaphoreNet 1.0.0

Install-Package DSemaphoreNet -Version 1.0.0
dotnet add package DSemaphoreNet --version 1.0.0
<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
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: DSemaphoreNet, 1.0.0"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. 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
The NuGet Team does not provide support for this client. Please contact its maintainers for support.


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

NuGet packages

This package is not used by any NuGet packages.

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Version Downloads Last updated
1.0.0 226 8/14/2020