[DeviceLight API] Content Side

content/browser/device_orientation/sensor_manager_android.cc

Index: content/browser/device_orientation/sensor_manager_android.cc
diff --git a/content/browser/device_orientation/sensor_manager_android.cc b/content/browser/device_orientation/sensor_manager_android.cc
index cec2c5e6a5eaba9bc30fc4d99fc09ac0b74fde53..77afb71abc3119b927c2fef8261c6832c2ed4c13 100644
--- a/content/browser/device_orientation/sensor_manager_android.cc
+++ b/content/browser/device_orientation/sensor_manager_android.cc
@@ -26,8 +26,10 @@ namespace content {
 
 SensorManagerAndroid::SensorManagerAndroid()
     : number_active_device_motion_sensors_(0),
+      device_light_buffer_(NULL),
       device_motion_buffer_(NULL),
       device_orientation_buffer_(NULL),
+      is_light_buffer_ready_(false),
       is_motion_buffer_ready_(false),
       is_orientation_buffer_ready_(false) {
   memset(received_motion_data_, 0, sizeof(received_motion_data_));
@@ -137,6 +139,23 @@ void SensorManagerAndroid::GotRotationRate(
   }
 }
 
+void SensorManagerAndroid::GotLight(
+    JNIEnv*, jobject, double value) {
+  base::AutoLock autolock(light_buffer_lock_);
+
+  if (!device_light_buffer_)
+    return;
+
+  device_light_buffer_->seqlock.WriteBegin();
+  device_light_buffer_->data = value;
+
+  device_light_buffer_->seqlock.WriteEnd();
+
+  if (!is_light_buffer_ready_) {
+      SetLightBufferReadyStatus(true);
+  }
+}
+
 bool SensorManagerAndroid::Start(EventType event_type) {
   DCHECK(!device_orientation_.is_null());
   return Java_DeviceMotionAndOrientation_start(
@@ -161,6 +180,45 @@ int SensorManagerAndroid::GetNumberActiveDeviceMotionSensors() {
 
 // ----- Shared memory API methods
 
+// --- Device Light
+
+bool SensorManagerAndroid::StartFetchingDeviceLightData(
+    DeviceLightHardwareBuffer* buffer) {
+  DCHECK(buffer);
+  {
+    base::AutoLock autolock(light_buffer_lock_);
+    device_light_buffer_ = buffer;
+    ClearInternalLightBuffers();
+  }
+  bool success = Start(kTypeLight);
+  {
+    base::AutoLock autolock(light_buffer_lock_);
+    // If Start() was unsuccessful then set the buffer ready flag to true
+    // to start firing all-null events.
+    SetLightBufferReadyStatus(!success);
+  }
+  return success;
+}
+
+void SensorManagerAndroid::StopFetchingDeviceLightData() {
+  Stop(kTypeLight);
+    {
+      base::AutoLock autolock(light_buffer_lock_);
+      if (device_light_buffer_) {
+        ClearInternalLightBuffers();
+        device_light_buffer_ = NULL;
+      }
+    }
+}
+
+void SensorManagerAndroid::SetLightBufferReadyStatus(bool ready) {
+  is_light_buffer_ready_ = ready;
+}
+
+void SensorManagerAndroid::ClearInternalLightBuffers() {
+  SetLightBufferReadyStatus(false);
+}
+
 // --- Device Motion
 
 bool SensorManagerAndroid::StartFetchingDeviceMotionData(