The semaphore Package

Let’s learn how we can use the semaphore package to control the access of goroutines to shared resources.

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What is a semaphore package?
Coding example
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What is a semaphore package?

The last lesson of this chapter presents the semaphore package, which is provided by the Go team. A semaphore is a construct that can limit or control the access to a shared resource. As we are talking about Go, a semaphore can limit the access of goroutines to a shared resource but originally, semaphores were used for limiting access to threads. Semaphores can have weights that limit the number of threads or goroutines that can have access to a resource.

The process is supported via the Acquire() and Release() methods, which are defined as follows:

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Course Introduction

Introduction to Go

Basic Go Data Types

Composite Data Types

Reflection and Interfaces

Go Packages and Functions

Telling a UNIX System What to Do

Go Concurrency

Building Web Services

Working with TCP/IP and WebSocket

Working with REST APIs

Code Testing and Profiling

Working with gRPC

Go Generics

Conclusion

Appendix A—Go Garbage Collector

The semaphore Package

What is a semaphore package?