Check clock accuracy before attempting to display clock

The RTC may not be set yet, may have been reset, or may have drifted
significantly if the device time hasn't been updated in a long time.

Using the the last_time_change file to determine if the time is known to
be accurate and only display the clock when that is the case.

Bug: 27802041
Change-Id: I845cf9c74fcb4009504f1bab853e04146fa19e1d

1 files changed, 20 insertions, 0 deletions

diff --git a/cmds/bootanimation/BootAnimation.h b/cmds/bootanimation/BootAnimation.h
index d49e1ec837b9..1c3d53a59bb8 100644
--- a/cmds/bootanimation/BootAnimation.h
+++ b/cmds/bootanimation/BootAnimation.h
@@ -51,6 +51,24 @@ private:
     virtual void        onFirstRef();
     virtual void        binderDied(const wp<IBinder>& who);
 
+    bool                updateIsTimeAccurate();
+
+    class TimeCheckThread : public Thread {
+    public:
+        TimeCheckThread(BootAnimation* bootAnimation);
+        virtual ~TimeCheckThread();
+    private:
+        virtual status_t    readyToRun();
+        virtual bool        threadLoop();
+        bool                doThreadLoop();
+        void                addTimeDirWatch();
+
+        int mInotifyFd;
+        int mSystemWd;
+        int mTimeWd;
+        BootAnimation* mBootAnimation;
+    };
+
     struct Texture {
         GLint   w;
         GLint   h;
@@ -113,8 +131,10 @@ private:
     sp<SurfaceControl> mFlingerSurfaceControl;
     sp<Surface> mFlingerSurface;
     bool        mClockEnabled;
+    bool        mTimeIsAccurate;
     String8     mZipFileName;
     SortedVector<String8> mLoadedFiles;
+    sp<TimeCheckThread> mTimeCheckThread;
 };
 
 // ---------------------------------------------------------------------------