singleton.go

package singleton

import (
        "sync"
)

type singleton struct {
        mu sync.Mutex
        counter int
}

func (s *singleton) Addone() {
        s.mu.Lock()
        s.counter++
        s.mu.Unlock()
}

var s *singleton

func init() {
        s = &singleton{
                counter: 0,
        }
}

func GetInstance() *singleton {
        return s
}

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