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async-mutex

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async-mutex

A mutex for guarding async workflows

  • 0.5.0
  • latest
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1.8M
decreased by-20.51%
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1
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What is async-mutex?

The async-mutex package provides a mutual exclusion mechanism (mutex) for asynchronous operations in JavaScript. This is useful when you need to ensure that only one piece of code can access a particular resource or execute a specific task at a time, even in a concurrent or asynchronous environment.

What are async-mutex's main functionalities?

Mutex

The Mutex class allows you to create a lock that can be used to protect a critical section of code so that only one caller can execute it at a time.

const { Mutex } = require('async-mutex');
const mutex = new Mutex();

async function criticalSection() {
  const release = await mutex.acquire();
  try {
    // Perform the critical task that must not be interrupted
  } finally {
    release();
  }
}

Semaphore

The Semaphore class is similar to Mutex but allows multiple concurrent accesses to a resource, with the maximum number of concurrent accesses specified during the creation of the Semaphore.

const { Semaphore } = require('async-mutex');
const semaphore = new Semaphore(2);

async function limitedAccessFunction() {
  const [value, release] = await semaphore.acquire();
  try {
    // Perform a task that should only allow 2 concurrent accesses
  } finally {
    release();
  }
}

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Package last updated on 11 Mar 2024

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