components/arc: implement multi advertising

components/arc/bluetooth/arc_bluetooth_bridge.h

Index: components/arc/bluetooth/arc_bluetooth_bridge.h
diff --git a/components/arc/bluetooth/arc_bluetooth_bridge.h b/components/arc/bluetooth/arc_bluetooth_bridge.h
index c1a6ade02b395302cca0302fb0cefdd8e0974edb..aa160bfd2ad6b606bcabbfcfb640776416c07d12 100644
--- a/components/arc/bluetooth/arc_bluetooth_bridge.h
+++ b/components/arc/bluetooth/arc_bluetooth_bridge.h
@@ -19,6 +19,7 @@
 #include "components/arc/instance_holder.h"
 #include "device/bluetooth/bluetooth_adapter.h"
 #include "device/bluetooth/bluetooth_adapter_factory.h"
+#include "device/bluetooth/bluetooth_advertisement.h"
 #include "device/bluetooth/bluetooth_device.h"
 #include "device/bluetooth/bluetooth_discovery_session.h"
 #include "device/bluetooth/bluetooth_local_gatt_service.h"
@@ -266,6 +267,17 @@ class ArcBluetoothBridge
                       mojo::Array<uint8_t> value,
                       const SendIndicationCallback& callback) override;
 
+  // Set up or disable multiple advertising.
+  void ReserveAdvertisementHandle(
+      const ReserveAdvertisementHandleCallback& callback) override;
+  void BroadcastAdvertisement(
+      int32_t adv_handle,
+      mojom::BluetoothAdvertisementPtr advertisement,
+      const BroadcastAdvertisementCallback& callback) override;
+  void ReleaseAdvertisementHandle(
+      int32_t adv_handle,
+      const ReleaseAdvertisementHandleCallback& callback) override;
+
   // Chrome observer callbacks
   void OnPoweredOn(
       const base::Callback<void(mojom::BluetoothAdapterState)>& callback) const;
@@ -312,6 +324,13 @@ class ArcBluetoothBridge
       std::unique_ptr<device::BluetoothGattNotifySession> notify_session);
 
  private:
+  // Structure to do bookkeeping for advertisements registered via
+  // multi advertisement across API calls.
+  struct AdvertisementInstance {
+    device::BluetoothAdvertisement::AdvertisementType adv_type;
+    scoped_refptr<device::BluetoothAdvertisement> advertisement;
+  };
+
   mojo::Array<mojom::BluetoothPropertyPtr> GetDeviceProperties(
       mojom::BluetoothPropertyType type,
       device::BluetoothDevice* device) const;
@@ -360,6 +379,42 @@ class ArcBluetoothBridge
                                    const base::Closure& success_callback,
                                    const ErrorCallback& error_callback);
 
+  // Callbacks for managing advertisements registered from the instance.
+
+  // Called when we have an open slot in the advertisement map and want to
+  // register the advertisement given by |data| for handle |adv_handle|.
+  void OnReadyToRegisterAdvertisement(
+      const BroadcastAdvertisementCallback& callback,
+      int32_t adv_handle,
+      std::unique_ptr<device::BluetoothAdvertisement::Data> data);
+  // Called when we've successfully registered a new advertisement for
+  // handle |adv_handle|.
+  void OnRegisterAdvertisementDone(
+      const BroadcastAdvertisementCallback& callback,
+      int32_t adv_handle,
+      scoped_refptr<device::BluetoothAdvertisement> advertisement);
+  // Called when the attempt to register an advertisement for handle
+  // |adv_handle| has failed. |adv_handle| remains reserved, but no
+  // advertisement is associated with it.
+  void OnRegisterAdvertisementError(
+      const BroadcastAdvertisementCallback& callback,
+      int32_t adv_handle,
+      device::BluetoothAdvertisement::ErrorCode error_code);
+  // Both of the following are called after we've tried to unregister
+  // the advertisement for |adv_handle|. Either way, we will no
+  // longer be broadcasting this advertisement, so in either case, the
+  // handle can be released.
+  void OnUnregisterAdvertisementDone(
+      const ReleaseAdvertisementHandleCallback& callback,
+      int32_t adv_handle);
+  void OnUnregisterAdvertisementError(
+      const ReleaseAdvertisementHandleCallback& callback,
+      int32_t adv_handle,
+      device::BluetoothAdvertisement::ErrorCode error_code);
+  // Find the next free advertisement handle and put it in *adv_handle,
+  // or return false if the advertisement map is full.
+  bool GetAdvertisementHandle(int32_t* adv_handle);
+
   bool CalledOnValidThread();
 
   mojo::Binding<mojom::BluetoothHost> binding_;
@@ -381,6 +436,11 @@ class ArcBluetoothBridge
   // Keeps track of all devices which initiated a GATT connection to us.
   std::unordered_set<std::string> gatt_connection_cache_;
 
+  // Holds advertising data registered by the instance.
+  static constexpr uint16_t kMaxAdvertisements = 5;
+  std::map<int32_t, scoped_refptr<device::BluetoothAdvertisement>>
+      advertisements_;
+
   base::ThreadChecker thread_checker_;
 
   // WeakPtrFactory to use for callbacks.