Bug 942712 - Ensure event 'AdapterAdded' will be fired after 'Enabled' being fired, r=gyeh

dom/bluetooth/BluetoothService.cpp

@@ -164,6 +164,9 @@ public:
     BluetoothSignal signal(signalName, NS_LITERAL_STRING(KEY_MANAGER), true);
     gBluetoothService->DistributeSignal(signal);
 
+    // Event 'AdapterAdded' has to be fired after firing 'Enabled'
+    gBluetoothService->TryFiringAdapterAdded();
+
     return NS_OK;
   }
 
@@ -508,6 +511,8 @@ BluetoothService::StartStopBluetooth(bool aStart, bool aIsStartup)
                                           LazyIdleThread::ManualShutdown);
   }
 
+  mAdapterAddedReceived = false;
+
   nsCOMPtr<nsIRunnable> runnable = new ToggleBtTask(aStart, aIsStartup);
   nsresult rv = mBluetoothThread->Dispatch(runnable, NS_DISPATCH_NORMAL);
   NS_ENSURE_SUCCESS(rv, rv);
@@ -786,6 +791,28 @@ BluetoothService::Observe(nsISupports* aSubject, const char* aTopic,
   return NS_ERROR_UNEXPECTED;
 }
 
+void
+BluetoothService::TryFiringAdapterAdded()
+{
+  MOZ_ASSERT(NS_IsMainThread());
+
+  if (IsToggling() || !mAdapterAddedReceived) {
+    return;
+  }
+
+  BluetoothSignal signal(NS_LITERAL_STRING("AdapterAdded"),
+                         NS_LITERAL_STRING(KEY_MANAGER), true);
+  DistributeSignal(signal);
+}
+
+void
+BluetoothService::AdapterAddedReceived()
+{
+  MOZ_ASSERT(NS_IsMainThread());
+
+  mAdapterAddedReceived = true;
+}
+
 void
 BluetoothService::Notify(const BluetoothSignal& aData)
 {

dom/bluetooth/BluetoothService.h

@@ -317,9 +317,16 @@ public:
   void
   RemoveObserverFromTable(const nsAString& key);
 
+  /**
+   * Below 2 function/variable are used for ensuring event 'AdapterAdded' will
+   * be fired after event 'Enabled'.
+   */
+  void TryFiringAdapterAdded();
+  void AdapterAddedReceived();
+
 protected:
-  BluetoothService()
-  : mEnabled(false)
+  BluetoothService() : mEnabled(false)
+                     , mAdapterAddedReceived(false)
   {
   }
 
@@ -408,6 +415,8 @@ private:
    * Bluetooth operations though.
    */
   nsCOMPtr<nsIThread> mBluetoothThread;
+
+  bool mAdapterAddedReceived;
 };
 
 END_BLUETOOTH_NAMESPACE

dom/bluetooth/bluedroid/gonk/BluetoothServiceBluedroid.cpp

@@ -35,31 +35,6 @@ using namespace mozilla;
 using namespace mozilla::ipc;
 USING_BLUETOOTH_NAMESPACE
 
-/**
- *  Classes only used in this file
- */
-class DistributeBluetoothSignalTask : public nsRunnable {
-public:
-  DistributeBluetoothSignalTask(const BluetoothSignal& aSignal) :
-    mSignal(aSignal)
-  {
-  }
-
-  NS_IMETHOD
-  Run()
-  {
-    MOZ_ASSERT(NS_IsMainThread());
-
-    BluetoothService* bs = BluetoothService::Get();
-    bs->DistributeSignal(mSignal);
-
-    return NS_OK;
-  }
-
-private:
-  BluetoothSignal mSignal;
-};
-
 /**
  *  Static variables
  */
@@ -81,6 +56,70 @@ static nsTArray<nsRefPtr<BluetoothReplyRunnable> > sUnbondingRunnableArray;
 static nsTArray<int> sRequestedDeviceCountArray;
 static StaticAutoPtr<Monitor> sToggleBtMonitor;
 
+/**
+ *  Classes only used in this file
+ */
+class DistributeBluetoothSignalTask : public nsRunnable {
+public:
+  DistributeBluetoothSignalTask(const BluetoothSignal& aSignal) :
+    mSignal(aSignal)
+  {
+  }
+
+  NS_IMETHOD
+  Run()
+  {
+    MOZ_ASSERT(NS_IsMainThread());
+
+    BluetoothService* bs = BluetoothService::Get();
+    NS_ENSURE_TRUE(bs, NS_ERROR_FAILURE);
+
+    bs->DistributeSignal(mSignal);
+
+    return NS_OK;
+  }
+
+private:
+  BluetoothSignal mSignal;
+};
+
+class SetupAfterEnabledTask : public nsRunnable
+{
+public:
+  SetupAfterEnabledTask()
+  { }
+
+  NS_IMETHOD
+  Run()
+  {
+    MOZ_ASSERT(NS_IsMainThread());
+
+    // Bluetooth scan mode is NONE by default
+    bt_scan_mode_t mode = BT_SCAN_MODE_CONNECTABLE;
+    bt_property_t prop;
+    prop.type = BT_PROPERTY_ADAPTER_SCAN_MODE;
+    prop.val = (void*)&mode;
+    prop.len = sizeof(mode);
+
+    NS_ENSURE_TRUE(sBtInterface, NS_ERROR_FAILURE);
+
+    int ret = sBtInterface->set_adapter_property(&prop);
+    if (ret != BT_STATUS_SUCCESS) {
+      BT_LOGR("%s: Fail to set: BT_SCAN_MODE_CONNECTABLE", __FUNCTION__);
+    }
+
+    // Try to fire event 'AdapterAdded' to fit the original behaviour when
+    // we used BlueZ as backend.
+    BluetoothService* bs = BluetoothService::Get();
+    NS_ENSURE_TRUE(bs, NS_ERROR_FAILURE);
+
+    bs->AdapterAddedReceived();
+    bs->TryFiringAdapterAdded();
+
+    return NS_OK;
+  }
+};
+
 /**
  *  Static callback functions
  */
@@ -222,34 +261,6 @@ BdAddressTypeToString(bt_bdaddr_t* aBdAddressType, nsAString& aRetBdAddress)
   aRetBdAddress = NS_ConvertUTF8toUTF16((char*)bdstr);
 }
 
-static void
-Setup()
-{
-  // Bluetooth scan mode is NONE by default
-  bt_scan_mode_t mode = BT_SCAN_MODE_CONNECTABLE;
-  bt_property_t prop;
-  prop.type = BT_PROPERTY_ADAPTER_SCAN_MODE;
-  prop.val = (void*)&mode;
-  prop.len = sizeof(mode);
-
-  NS_ENSURE_TRUE_VOID(sBtInterface);
-
-  int ret = sBtInterface->set_adapter_property(&prop);
-  if (ret != BT_STATUS_SUCCESS) {
-    BT_LOGR("%s: Fail to set: BT_SCAN_MODE_CONNECTABLE", __FUNCTION__);
-  }
-
-  // Event 'AdapterAdded' has to be fired after enabled to notify Gaia
-  // that BluetoothAdapter is ready.
-  BluetoothSignal signal(NS_LITERAL_STRING("AdapterAdded"),
-                         NS_LITERAL_STRING(KEY_MANAGER), true);
-  nsRefPtr<DistributeBluetoothSignalTask>
-    t = new DistributeBluetoothSignalTask(signal);
-  if (NS_FAILED(NS_DispatchToMainThread(t))) {
-    BT_WARNING("Failed to dispatch to main thread!");
-  }
-}
-
 static void
 AdapterStateChangeCallback(bt_state_t aStatus)
 {
@@ -264,8 +275,9 @@ AdapterStateChangeCallback(bt_state_t aStatus)
     lock.Notify();
   }
 
-  if (sIsBtEnabled) {
-    Setup();
+  if (sIsBtEnabled &&
+      NS_FAILED(NS_DispatchToMainThread(new SetupAfterEnabledTask()))) {
+    BT_WARNING("Failed to dispatch to main thread!");
   }
 }
 

dom/bluetooth/bluez/linux/BluetoothDBusService.cpp

@@ -335,6 +335,24 @@ private:
   BluetoothSignal mSignal;
 };
 
+class TryFiringAdapterAddedTask : public nsRunnable
+{
+public:
+  NS_IMETHOD
+  Run()
+  {
+    MOZ_ASSERT(NS_IsMainThread());
+
+    BluetoothService* bs = BluetoothService::Get();
+    NS_ENSURE_TRUE(bs, NS_ERROR_FAILURE);
+
+    bs->AdapterAddedReceived();
+    bs->TryFiringAdapterAdded();
+
+    return NS_OK;
+  }
+};
+
 static bool
 IsDBusMessageError(DBusMessage* aMsg, DBusError* aErr, nsAString& aErrorStr)
 {
@@ -709,11 +727,7 @@ GetProperty(DBusMessageIter aIter, Properties* aPropertyTypes,
     // Notify BluetoothManager whenever adapter name is ready.
     if (!propertyValue.get_nsString().IsEmpty()) {
       sAdapterNameIsReady = true;
-      BluetoothSignal signal(NS_LITERAL_STRING("AdapterAdded"),
-                             NS_LITERAL_STRING(KEY_MANAGER), sAdapterPath);
-      nsRefPtr<DistributeBluetoothSignalTask> task =
-        new DistributeBluetoothSignalTask(signal);
-      NS_DispatchToMainThread(task);
+      NS_DispatchToMainThread(new TryFiringAdapterAddedTask());
     }
   }