Mutex: User to protect the state or several assets example

stateprotection.go

import (
    “sync"
)

type Player struct {
    sync.Mutex
    Health int
}
func (p *Player) DecreaseHealthPoint(damageTaken int)
{
    p.Lock() // lock access from other goroutine.
    p.Health = p.Health - damageTaken // the protected shared resource
    p.Unlock() // release the lock so other goroutine can access the struct.
}