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/*
* Copyright 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "BtGdModule"
#include "module.h"
#include "common/init_flags.h"
#include "dumpsys/init_flags.h"
#include "os/wakelock_manager.h"
using ::bluetooth::os::Handler;
using ::bluetooth::os::Thread;
using ::bluetooth::os::WakelockManager;
namespace bluetooth {
constexpr std::chrono::milliseconds kModuleStopTimeout = std::chrono::milliseconds(2000);
ModuleFactory::ModuleFactory(std::function<Module*()> ctor) : ctor_(ctor) {
}
Handler* Module::GetHandler() const {
ASSERT_LOG(handler_ != nullptr, "Can't get handler when it's not started");
return handler_;
}
DumpsysDataFinisher EmptyDumpsysDataFinisher = [](DumpsysDataBuilder* dumpsys_data_builder) {};
DumpsysDataFinisher Module::GetDumpsysData(flatbuffers::FlatBufferBuilder* builder) const {
return EmptyDumpsysDataFinisher;
}
const ModuleRegistry* Module::GetModuleRegistry() const {
return registry_;
}
Module* Module::GetDependency(const ModuleFactory* module) const {
for (auto& dependency : dependencies_.list_) {
if (dependency == module) {
return registry_->Get(module);
}
}
ASSERT_LOG(false, "Module was not listed as a dependency in ListDependencies");
}
Module* ModuleRegistry::Get(const ModuleFactory* module) const {
auto instance = started_modules_.find(module);
ASSERT_LOG(instance != started_modules_.end(), "Request for module not started up, maybe not in Start(ModuleList)?");
return instance->second;
}
bool ModuleRegistry::IsStarted(const ModuleFactory* module) const {
return started_modules_.find(module) != started_modules_.end();
}
void ModuleRegistry::Start(ModuleList* modules, Thread* thread) {
for (auto it = modules->list_.begin(); it != modules->list_.end(); it++) {
Start(*it, thread);
}
}
void ModuleRegistry::set_registry_and_handler(Module* instance, Thread* thread) const {
instance->registry_ = this;
instance->handler_ = new Handler(thread);
}
Module* ModuleRegistry::Start(const ModuleFactory* module, Thread* thread) {
auto started_instance = started_modules_.find(module);
if (started_instance != started_modules_.end()) {
return started_instance->second;
}
LOG_DEBUG("Constructing next module");
Module* instance = module->ctor_();
last_instance_ = "starting " + instance->ToString();
set_registry_and_handler(instance, thread);
LOG_DEBUG("Starting dependencies of %s", instance->ToString().c_str());
instance->ListDependencies(&instance->dependencies_);
Start(&instance->dependencies_, thread);
LOG_DEBUG("Finished starting dependencies and calling Start() of %s", instance->ToString().c_str());
instance->Start();
start_order_.push_back(module);
started_modules_[module] = instance;
LOG_DEBUG("Started %s", instance->ToString().c_str());
return instance;
}
void ModuleRegistry::StopAll() {
// Since modules were brought up in dependency order, it is safe to tear down by going in reverse order.
for (auto it = start_order_.rbegin(); it != start_order_.rend(); it++) {
auto instance = started_modules_.find(*it);
ASSERT(instance != started_modules_.end());
last_instance_ = "stopping " + instance->second->ToString();
// Clear the handler before stopping the module to allow it to shut down gracefully.
LOG_INFO("Stopping Handler of Module %s", instance->second->ToString().c_str());
instance->second->handler_->Clear();
instance->second->handler_->WaitUntilStopped(kModuleStopTimeout);
LOG_INFO("Stopping Module %s", instance->second->ToString().c_str());
instance->second->Stop();
}
for (auto it = start_order_.rbegin(); it != start_order_.rend(); it++) {
auto instance = started_modules_.find(*it);
ASSERT(instance != started_modules_.end());
delete instance->second->handler_;
delete instance->second;
started_modules_.erase(instance);
}
ASSERT(started_modules_.empty());
start_order_.clear();
}
os::Handler* ModuleRegistry::GetModuleHandler(const ModuleFactory* module) const {
auto started_instance = started_modules_.find(module);
if (started_instance != started_modules_.end()) {
return started_instance->second->GetHandler();
}
return nullptr;
}
void ModuleDumper::DumpState(std::string* output) const {
ASSERT(output != nullptr);
flatbuffers::FlatBufferBuilder builder(1024);
auto title = builder.CreateString(title_);
auto init_flags_offset = dumpsys::InitFlags::Dump(&builder);
auto wakelock_offset = WakelockManager::Get().GetDumpsysData(&builder);
std::queue<DumpsysDataFinisher> queue;
for (auto it = module_registry_.start_order_.rbegin(); it != module_registry_.start_order_.rend(); it++) {
auto instance = module_registry_.started_modules_.find(*it);
ASSERT(instance != module_registry_.started_modules_.end());
queue.push(instance->second->GetDumpsysData(&builder));
}
DumpsysDataBuilder data_builder(builder);
data_builder.add_title(title);
data_builder.add_init_flags(init_flags_offset);
data_builder.add_wakelock_manager_data(wakelock_offset);
while (!queue.empty()) {
queue.front()(&data_builder);
queue.pop();
}
builder.Finish(data_builder.Finish());
*output = std::string(builder.GetBufferPointer(), builder.GetBufferPointer() + builder.GetSize());
}
} // namespace bluetooth
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