Implementing CountDownLatch Functionality in Go Inspired by Java

Fri, 09 Apr 2021 12:42:59 +0300

When working with concurrent applications, synchronization primitives are essential tools. While Go provides sync.WaitGroup, sometimes we need more sophisticated control like timeouts. Java’s CountDownLatch offers this functionality, so let’s implement it in Go.

The Implementation

Our CountDownLatch combines Go’s sync.WaitGroup with atomic operations for thread-safe counting:

type CountDownLatch struct {
 sync.WaitGroup
 counter uint64
}

The struct embeds sync.WaitGroup and adds a counter field using uint64 to store two 32-bit counters in one atomic value.

Concurrency on Umit Unal

Implementing CountDownLatch Functionality in Go Inspired by Java

The Implementation