1 //
2 // Copyright 2015 Google, Inc.
3 //
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at:
7 //
8 // http://www.apache.org/licenses/LICENSE-2.0
9 //
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an "AS IS" BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
15 //
16
17 #include "service/gatt_client.h"
18
19 #include <base/logging.h>
20
21 using std::lock_guard;
22 using std::mutex;
23
24 namespace bluetooth {
25
26 // GattClient implementation
27 // ========================================================
28
GattClient(const Uuid & uuid,int client_id)29 GattClient::GattClient(const Uuid& uuid, int client_id)
30 : app_identifier_(uuid), client_id_(client_id) {}
31
~GattClient()32 GattClient::~GattClient() {
33 // Automatically unregister the client.
34 VLOG(1) << "GattClient unregistering client: " << client_id_;
35
36 hal::BluetoothGattInterface::Get()
37 ->GetClientHALInterface()
38 ->unregister_client(client_id_);
39 }
40
GetAppIdentifier() const41 const Uuid& GattClient::GetAppIdentifier() const { return app_identifier_; }
42
GetInstanceId() const43 int GattClient::GetInstanceId() const { return client_id_; }
44
45 // GattClientFactory implementation
46 // ========================================================
47
GattClientFactory()48 GattClientFactory::GattClientFactory() {
49 hal::BluetoothGattInterface::Get()->AddClientObserver(this);
50 }
51
~GattClientFactory()52 GattClientFactory::~GattClientFactory() {
53 hal::BluetoothGattInterface::Get()->RemoveClientObserver(this);
54 }
55
RegisterInstance(const Uuid & uuid,const RegisterCallback & callback)56 bool GattClientFactory::RegisterInstance(const Uuid& uuid,
57 const RegisterCallback& callback) {
58 VLOG(1) << __func__ << " - Uuid: " << uuid.ToString();
59 lock_guard<mutex> lock(pending_calls_lock_);
60
61 if (pending_calls_.find(uuid) != pending_calls_.end()) {
62 LOG(ERROR) << "GATT client with given Uuid already registered - "
63 << "Uuid: " << uuid.ToString();
64 return false;
65 }
66
67 const btgatt_client_interface_t* hal_iface =
68 hal::BluetoothGattInterface::Get()->GetClientHALInterface();
69
70 if (hal_iface->register_client(uuid, false) != BT_STATUS_SUCCESS)
71 return false;
72
73 pending_calls_[uuid] = callback;
74
75 return true;
76 }
77
RegisterClientCallback(hal::BluetoothGattInterface *,int status,int client_id,const Uuid & app_uuid)78 void GattClientFactory::RegisterClientCallback(
79 hal::BluetoothGattInterface* /* gatt_iface */, int status, int client_id,
80 const Uuid& app_uuid) {
81 Uuid uuid(app_uuid);
82
83 auto iter = pending_calls_.find(uuid);
84 if (iter == pending_calls_.end()) {
85 VLOG(1) << "Ignoring callback for unknown app_id: " << uuid.ToString();
86 return;
87 }
88
89 bool success = (status == BT_STATUS_SUCCESS);
90 BLEStatus result = success ? BLE_STATUS_SUCCESS : BLE_STATUS_FAILURE;
91
92 // No need to construct a client if the call wasn't successful.
93 std::unique_ptr<GattClient> client;
94 if (success) client.reset(new GattClient(uuid, client_id));
95
96 // Notify the result via the result callback.
97 iter->second(result, uuid, std::move(client));
98
99 pending_calls_.erase(iter);
100 }
101
102 } // namespace bluetooth
103