package docker import ( "fmt" "github.com/dotcloud/docker/future" "sync" "time" ) type State struct { Running bool Pid int ExitCode int StartedAt time.Time stateChangeLock *sync.Mutex stateChangeCond *sync.Cond } func newState() *State { lock := new(sync.Mutex) return &State{ stateChangeLock: lock, stateChangeCond: sync.NewCond(lock), } } // String returns a human-readable description of the state func (s *State) String() string { if s.Running { return fmt.Sprintf("Up %s", future.HumanDuration(time.Now().Sub(s.StartedAt))) } return fmt.Sprintf("Exit %d", s.ExitCode) } func (s *State) setRunning(pid int) { s.Running = true s.ExitCode = 0 s.Pid = pid s.StartedAt = time.Now() s.broadcast() } func (s *State) setStopped(exitCode int) { s.Running = false s.Pid = 0 s.ExitCode = exitCode s.broadcast() } func (s *State) broadcast() { s.stateChangeLock.Lock() s.stateChangeCond.Broadcast() s.stateChangeLock.Unlock() } func (s *State) wait() { s.stateChangeLock.Lock() s.stateChangeCond.Wait() s.stateChangeLock.Unlock() }