To protect a global resource from concurrent access using a sync.Locker in Golang, you can follow these steps:
Import the sync package by adding the following import statement to your code:
import "sync"
Create a global variable of type sync.Locker:
var mutex sync.Locker = &sync.Mutex{}
Whenever you want to access the global resource, use the Lock and Unlock methods of the sync.Locker interface:
// Lock the mutex before accessing the global resource
mutex.Lock()
defer mutex.Unlock() // Ensure that the mutex is always unlocked, even in case of panic or return
// Access the global resource here
// Your code goes here
By locking the mutex before accessing the global resource and unlocking it afterward, you ensure that only one goroutine can access the resource at a time. Other goroutines that try to access the resource while it is locked will wait until the lock is released.
Note: Make sure to use the same sync.Locker instance (in this case, the mutex variable) across all goroutines that need to access the protected resource.