1 files changed, 84 insertions, 0 deletions
diff --git a/runtime/state.go b/runtime/state.go
new file mode 100644
index 0000000000..316b8a40f1
--- /dev/null
+++ b/runtime/state.go
@@ -0,0 +1,84 @@
+package runtime
+
+import (
+	"fmt"
+	"github.com/dotcloud/docker/utils"
+	"sync"
+	"time"
+)
+
+type State struct {
+	sync.RWMutex
+	Running    bool
+	Pid        int
+	ExitCode   int
+	StartedAt  time.Time
+	FinishedAt time.Time
+	Ghost      bool
+}
+
+// String returns a human-readable description of the state
+func (s *State) String() string {
+	s.RLock()
+	defer s.RUnlock()
+
+	if s.Running {
+		if s.Ghost {
+			return fmt.Sprintf("Ghost")
+		}
+		return fmt.Sprintf("Up %s", utils.HumanDuration(time.Now().UTC().Sub(s.StartedAt)))
+	}
+	if s.FinishedAt.IsZero() {
+		return ""
+	}
+	return fmt.Sprintf("Exited (%d) %s ago", s.ExitCode, utils.HumanDuration(time.Now().UTC().Sub(s.FinishedAt)))
+}
+
+func (s *State) IsRunning() bool {
+	s.RLock()
+	defer s.RUnlock()
+
+	return s.Running
+}
+
+func (s *State) IsGhost() bool {
+	s.RLock()
+	defer s.RUnlock()
+
+	return s.Ghost
+}
+
+func (s *State) GetExitCode() int {
+	s.RLock()
+	defer s.RUnlock()
+
+	return s.ExitCode
+}
+
+func (s *State) SetGhost(val bool) {
+	s.Lock()
+	defer s.Unlock()
+
+	s.Ghost = val
+}
+
+func (s *State) SetRunning(pid int) {
+	s.Lock()
+	defer s.Unlock()
+
+	s.Running = true
+	s.Ghost = false
+	s.ExitCode = 0
+	s.Pid = pid
+	s.StartedAt = time.Now().UTC()
+}
+
+func (s *State) SetStopped(exitCode int) {
+	s.Lock()
+	defer s.Unlock()
+
+	s.Running = false
+	s.Pid = 0
+	s.FinishedAt = time.Now().UTC()
+	s.ExitCode = exitCode
+}