1 /*
2 * Copyright 2022 The Android Open Source Project
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 #define LOG_TAG "bt_headless_messenger"
18
19 #include "test/headless/messenger.h"
20
21 #include <condition_variable>
22 #include <deque>
23 #include <memory>
24 #include <mutex>
25
26 #include "test/headless/interface.h"
27 #include "test/headless/log.h"
28
29 using namespace bluetooth::test::headless;
30 using namespace std::chrono_literals;
31
32 template <typename T>
33 struct callback_queue_t {
callback_queue_tcallback_queue_t34 callback_queue_t(const std::string name) : name_(name) {}
35 // Must be held with lock
sizecallback_queue_t36 size_t size() const { return callback_queue.size(); }
37
38 private:
39 const std::string name_;
40 std::deque<T> callback_queue;
41
42 public:
Pushcallback_queue_t43 void Push(T elem) { callback_queue.push_back(elem); }
44 // Must be held with lock
Popcallback_queue_t45 T Pop() {
46 T p = callback_queue.front();
47 callback_queue.pop_front();
48 return p;
49 }
50 // Must be held with lock
emptycallback_queue_t51 bool empty() const { return callback_queue.empty(); }
52 };
53
54 struct messenger_t {
55 mutable std::mutex mutex;
56 std::condition_variable cv;
57 callback_queue_t<std::shared_ptr<callback_params_t>> callback_queue =
58 callback_queue_t<std::shared_ptr<callback_params_t>>("callbacks");
Pushmessenger_t59 void Push(std::shared_ptr<callback_params_t> elem) {
60 std::unique_lock<std::mutex> lk(mutex);
61 callback_queue.Push(elem);
62 cv.notify_all();
63 }
64 };
65
66 namespace bluetooth {
67 namespace test {
68 namespace headless {
69 namespace messenger {
70
71 // Called by client to await any callback for the given callbacks
72 messenger_t callback_data_;
73
await_callback(Context & context)74 bool await_callback(Context& context) {
75 std::unique_lock<std::mutex> lk(callback_data_.mutex);
76 while (!callback_data_.callback_queue.empty()) {
77 std::shared_ptr<callback_params_t> cb = callback_data_.callback_queue.Pop();
78 if (std::find(context.callbacks.begin(), context.callbacks.end(),
79 cb->CallbackType()) != context.callbacks.end()) {
80 context.callback_ready_q.push_back(cb);
81 }
82 }
83 if (context.callback_ready_q.size() == 0) {
84 callback_data_.cv.wait_for(lk, context.timeout);
85 }
86 return true;
87 }
88
89 } // namespace messenger
90 } // namespace headless
91 } // namespace test
92 } // namespace bluetooth
93
94 namespace bluetooth::test::headless {
95
messenger_stats()96 void messenger_stats() {
97 // LOG_CONSOLE("%30s cnt:%zu", "device_found",
98 // discovered::device_found_.size()); LOG_CONSOLE("%30s cnt:%zu",
99 // "remote_device_properties",
100 // properties::remote_device_properties_.size());
101 }
102
103 // Callbacks that the messenger will handle from the bluetooth stack
start_messenger()104 void start_messenger() {
105 headless_add_callback("acl_state_changed", [](callback_data_t* data) {
106 log::assert_that(data != nullptr, "Received nullptr callback data");
107 messenger::callback_data_.Push(std::make_shared<acl_state_changed_params_t>(
108 *(static_cast<acl_state_changed_params_t*>(data))));
109 });
110 headless_add_callback("adapter_properties", [](callback_data_t* data) {
111 log::assert_that(data != nullptr, "Received nullptr callback data");
112 messenger::callback_data_.Push(
113 std::make_shared<adapter_properties_params_t>(
114 *(static_cast<adapter_properties_params_t*>(data))));
115 });
116 headless_add_callback("device_found", [](callback_data_t* data) {
117 log::assert_that(data != nullptr, "Received nullptr callback data");
118 messenger::callback_data_.Push(std::make_shared<device_found_params_t>(
119 *(static_cast<device_found_params_t*>(data))));
120 });
121 headless_add_callback("remote_device_properties", [](callback_data_t* data) {
122 log::assert_that(data != nullptr, "Received nullptr callback data");
123 messenger::callback_data_.Push(
124 std::make_shared<remote_device_properties_params_t>(
125 *(static_cast<remote_device_properties_params_t*>(data))));
126 });
127 LOG_CONSOLE("Started messenger service");
128 }
129
stop_messenger()130 void stop_messenger() {
131 headless_remove_callback("remote_device_properties");
132 headless_remove_callback("device_found");
133 headless_remove_callback("adapter_properties");
134 headless_remove_callback("acl_state_changed");
135
136 LOG_CONSOLE("Stopped messenger service");
137
138 messenger_stats();
139 }
140
141 } // namespace bluetooth::test::headless
142