1 /*
2 * Copyright 2019 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 #include "stack_manager.h"
18
19 #include <fcntl.h>
20 #include <unistd.h>
21 #include <chrono>
22 #include <future>
23 #include <queue>
24
25 #include "common/bind.h"
26 #include "module.h"
27 #include "os/handler.h"
28 #include "os/log.h"
29 #include "os/thread.h"
30 #include "os/wakelock_manager.h"
31
32 using ::bluetooth::os::Handler;
33 using ::bluetooth::os::Thread;
34 using ::bluetooth::os::WakelockManager;
35
36 namespace bluetooth {
37
38 constexpr char bluetooth_pid_file[] = "/var/run/bluetooth";
39
StartUp(ModuleList * modules,Thread * stack_thread)40 void StackManager::StartUp(ModuleList* modules, Thread* stack_thread) {
41 management_thread_ = new Thread("management_thread", Thread::Priority::NORMAL);
42 handler_ = new Handler(management_thread_);
43
44 WakelockManager::Get().Acquire();
45
46 std::promise<void> promise;
47 auto future = promise.get_future();
48 handler_->Post(common::BindOnce(&StackManager::handle_start_up, common::Unretained(this), modules, stack_thread,
49 std::move(promise)));
50
51 auto init_status = future.wait_for(std::chrono::seconds(3));
52
53 WakelockManager::Get().Release();
54
55 ASSERT_LOG(
56 init_status == std::future_status::ready,
57 "Can't start stack, last instance: %s",
58 registry_.last_instance_.c_str());
59
60 pid_fd_ = open(bluetooth_pid_file, O_WRONLY | O_CREAT, 0644);
61 pid_t my_pid = getpid();
62 write(pid_fd_, &my_pid, sizeof(pid_t));
63
64 LOG_INFO("init complete");
65 }
66
handle_start_up(ModuleList * modules,Thread * stack_thread,std::promise<void> promise)67 void StackManager::handle_start_up(ModuleList* modules, Thread* stack_thread, std::promise<void> promise) {
68 registry_.Start(modules, stack_thread);
69 promise.set_value();
70 }
71
ShutDown()72 void StackManager::ShutDown() {
73 WakelockManager::Get().Acquire();
74
75 std::promise<void> promise;
76 auto future = promise.get_future();
77 handler_->Post(common::BindOnce(&StackManager::handle_shut_down, common::Unretained(this), std::move(promise)));
78
79 auto stop_status = future.wait_for(std::chrono::seconds(5));
80
81 WakelockManager::Get().Release();
82 WakelockManager::Get().CleanUp();
83
84 ASSERT_LOG(
85 stop_status == std::future_status::ready,
86 "Can't stop stack, last instance: %s",
87 registry_.last_instance_.c_str());
88
89 handler_->Clear();
90 handler_->WaitUntilStopped(std::chrono::milliseconds(2000));
91 delete handler_;
92 delete management_thread_;
93
94 unlink(bluetooth_pid_file);
95 close(pid_fd_);
96 }
97
handle_shut_down(std::promise<void> promise)98 void StackManager::handle_shut_down(std::promise<void> promise) {
99 registry_.StopAll();
100 promise.set_value();
101 }
102
103 } // namespace bluetooth
104