Notify applications when input devices change.

This change allows the InputManager to keep track of what input
devices are registered with the system and when they change.
It needs to do this so that it can properly clear its cache of
input device properties (especially the key map!) when changes
occur.

Added new API so that applications can register listeners for
input device changes.

Fixed a minor bug in EventHub where it didn't handle EPOLLHUP
properly so it would spam the log about unsupposed epoll events
until inotify noticed that the device was gone and removed it.

Change-Id: I937d8c601f7185d4299038bce6a2934fe4fdd2b3

1 files changed, 4 insertions, 1 deletions

diff --git a/include/androidfw/InputDevice.h b/include/androidfw/InputDevice.h
index c9554dc..2eac544 100644
--- a/include/androidfw/InputDevice.h
+++ b/include/androidfw/InputDevice.h
@@ -66,9 +66,11 @@ public:
         float fuzz;
     };
 
-    void initialize(int32_t id, const String8& name, const String8& descriptor);
+    void initialize(int32_t id, int32_t generation,
+            const String8& name, const String8& descriptor);
 
     inline int32_t getId() const { return mId; }
+    inline int32_t getGeneration() const { return mGeneration; }
     inline const String8 getName() const { return mName; }
     inline const String8 getDescriptor() const { return mDescriptor; }
     inline uint32_t getSources() const { return mSources; }
@@ -97,6 +99,7 @@ public:
 
 private:
     int32_t mId;
+    int32_t mGeneration;
     String8 mName;
     String8 mDescriptor;
     uint32_t mSources;