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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "device/bluetooth/bluetooth_socket_thread.h"
#include <memory>
#include "base/lazy_instance.h"
#include "base/message_loop/message_pump_type.h"
#include "base/task/sequenced_task_runner.h"
#include "base/threading/thread.h"
namespace device {
base::LazyInstance<scoped_refptr<BluetoothSocketThread>>::DestructorAtExit
g_instance = LAZY_INSTANCE_INITIALIZER;
// static
scoped_refptr<BluetoothSocketThread> BluetoothSocketThread::Get() {
if (!g_instance.Get().get()) {
g_instance.Get() = new BluetoothSocketThread();
}
return g_instance.Get();
}
// static
void BluetoothSocketThread::CleanupForTesting() {
DCHECK(g_instance.Get().get());
g_instance.Get().reset();
}
BluetoothSocketThread::BluetoothSocketThread() = default;
BluetoothSocketThread::~BluetoothSocketThread() {
if (thread_) {
thread_->Stop();
thread_.reset(NULL);
task_runner_.reset();
}
}
void BluetoothSocketThread::OnSocketActivate() {
DCHECK(thread_checker_.CalledOnValidThread());
active_socket_count_ += 1;
EnsureStarted();
}
void BluetoothSocketThread::OnSocketDeactivate() {
DCHECK(thread_checker_.CalledOnValidThread());
active_socket_count_ -= 1;
}
void BluetoothSocketThread::EnsureStarted() {
DCHECK(thread_checker_.CalledOnValidThread());
if (thread_)
return;
base::Thread::Options thread_options;
thread_options.message_pump_type = base::MessagePumpType::IO;
thread_ = std::make_unique<base::Thread>("BluetoothSocketThread");
thread_->StartWithOptions(std::move(thread_options));
task_runner_ = thread_->task_runner();
}
scoped_refptr<base::SequencedTaskRunner> BluetoothSocketThread::task_runner()
const {
DCHECK(active_socket_count_.load(std::memory_order_relaxed) > 0);
DCHECK(thread_);
DCHECK(task_runner_.get());
return task_runner_;
}
} // namespace device
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