Alexander Ivanov 4904d7eea0 #1021: Fix checkstyle warnings by changing the license header template (#1027)
* Add custom license header style in order to comply with Google's Checkstyle format

* Update license headers to comply with Google's Checkstyle format
2019-10-22 08:15:35 +03:00
..
2017-11-28 20:55:52 +02:00
2019-10-12 20:05:54 +03:00
2017-11-28 21:28:53 +02:00

layout, title, folder, permalink, categories, tags
layout title folder permalink categories tags
pattern Semaphore semaphore /patterns/semaphore/ Concurrency
Java
Difficulty-Intermediate

Also known as

Counting Semaphore

Intent

Create a lock which mediates access to a pool of resources. Only a limited number of threads, specified at the creation of the semaphore, can access the resources at any given time. A semaphore which only allows one concurrent access to a resource is called a binary semaphore.

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Applicability

Use a Semaphore when

  • you have a pool of resources to allocate to different threads
  • concurrent access to a resource could lead to a race condition

Credits