Synchronizing access to a resource with Mutex

In case the code uses the concurrent access to any resource which is considered to be unsafe for concurrent use, it is necessary to implement a synchronization mechanism to secure the access. Besides the channel usage, Mutex could be leveraged for this purpose. This recipe will show you how.

How to do it...

1. Open the console and create the folder chapter10/recipe01.
2. Navigate to the directory.
3. Create the file mutex.go with the following content:

        package main

        import (
          "fmt"
          "sync"
        )

        var names = []string{"Alan", "Joe", "Jack", "Ben",
                             "Ellen", "Lisa", "Carl", "Steve",
                             "Anton", "Yo"}

        type SyncList struct {
          m sync.Mutex
          slice []interface{}
        }

        func NewSyncList(cap int) *SyncList {
          return &SyncList{
            sync.Mutex{},
            make([]interface{}, cap),
          }
        }

  ...