Unlocking Java AQS Shared Mode: How Semaphore Works Under the Hood

This article explains the shared‑mode acquisition in Java's AbstractQueuedSynchronizer, walks through the core template methods, compares them with exclusive mode, and demonstrates a classic application by dissecting the Semaphore source code and its usage patterns.

AQSJavaSharedLock

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Unlocking Java AQS Shared Mode: How Semaphore Works Under the Hood

Architect's Tech Stack

Aug 8, 2018 · Backend Development

Deep Dive into Java AQS Shared‑Lock Implementation

This article explains the execution flow, source‑code details, and wake‑up logic of Java's AbstractQueuedSynchronizer shared‑lock mode, covering acquireShared, doAcquireShared, setHeadAndPropagate, doReleaseShared, and releaseShared methods with full code snippets and practical guidance.

AQSJavaSharedLock

0 likes · 11 min read

Deep Dive into Java AQS Shared‑Lock Implementation