Go Mutex and RWMutex: Difference between revisions

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=Overview=
=Overview=
A <code>Mutex</code> is a '''mutual exclusion''' lock. Only one goroutine can enter the critical section at a time. Not until the call to the <code>Unlock()</code> function issued can another goroutine enter the critical section.
A <code>Mutex</code> is a [[Concurrent_(Parallel)_Programming#Mutual_Exclusion|mutual exclusion]] lock, implemented as a [[Concurrent_(Parallel)_Programming#Binary_Semaphore|binary semaphore]]. Only one goroutine can enter the critical section at a time. Not until the call to the <code>Unlock()</code> function issued can another goroutine enter the critical section.


The usage pattern follows, and the curly braces are not necessary, but can be used for clarity:
The usage pattern follows, and the curly braces are not necessary, but can be used for clarity:

Revision as of 19:44, 5 September 2023

External

Internal

Overview

A Mutex is a mutual exclusion lock, implemented as a binary semaphore. Only one goroutine can enter the critical section at a time. Not until the call to the Unlock() function issued can another goroutine enter the critical section.

The usage pattern follows, and the curly braces are not necessary, but can be used for clarity:

var mutex sync.Mutex

...

mutex.Lock() {
    // do something in a mutual exclusion mode
}

mutex.Unlock()