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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "device/bluetooth/bluetooth_adapter_factory.h"
#include <vector>
#include "base/bind.h"
#include "base/lazy_instance.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "device/bluetooth/bluetooth_adapter.h"
#if defined(OS_CHROMEOS)
#include "device/bluetooth/bluetooth_adapter_chromeos.h"
#elif defined(OS_WIN)
#include "device/bluetooth/bluetooth_adapter_win.h"
#endif
namespace {
using device::BluetoothAdapter;
using device::BluetoothAdapterFactory;
// Shared default adapter instance, we don't want to keep this class around
// if nobody is using it so use a WeakPtr and create the object when needed;
// since Google C++ Style (and clang's static analyzer) forbids us having
// exit-time destructors we use a leaky lazy instance for it.
base::LazyInstance<base::WeakPtr<device::BluetoothAdapter> >::Leaky
default_adapter = LAZY_INSTANCE_INITIALIZER;
typedef std::vector<BluetoothAdapterFactory::AdapterCallback>
AdapterCallbackList;
// List of adapter callbacks to be called once the adapter is initialized.
// Since Google C++ Style (and clang's static analyzer) forbids us having
// exit-time destructors we use a lazy instance for it.
base::LazyInstance<AdapterCallbackList> adapter_callbacks =
LAZY_INSTANCE_INITIALIZER;
void RunAdapterCallbacks() {
CHECK(default_adapter.Get().get());
scoped_refptr<BluetoothAdapter> adapter(default_adapter.Get());
for (std::vector<BluetoothAdapterFactory::AdapterCallback>::const_iterator
iter = adapter_callbacks.Get().begin();
iter != adapter_callbacks.Get().end();
++iter) {
iter->Run(adapter);
}
adapter_callbacks.Get().clear();
}
} // namespace
namespace device {
// static
bool BluetoothAdapterFactory::IsBluetoothAdapterAvailable() {
#if defined(OS_CHROMEOS)
return true;
#elif defined(OS_WIN)
return true;
#endif
return false;
}
// static
void BluetoothAdapterFactory::GetAdapter(const AdapterCallback& callback) {
if (!default_adapter.Get().get()) {
#if defined(OS_CHROMEOS)
chromeos::BluetoothAdapterChromeOs* new_adapter =
new chromeos::BluetoothAdapterChromeOs;
new_adapter->TrackDefaultAdapter();
default_adapter.Get() = new_adapter->weak_ptr_factory_.GetWeakPtr();
#elif defined(OS_WIN)
BluetoothAdapterWin* new_adapter = new BluetoothAdapterWin(
base::Bind(&RunAdapterCallbacks));
new_adapter->TrackDefaultAdapter();
default_adapter.Get() = new_adapter->weak_ptr_factory_.GetWeakPtr();
#endif
}
if (default_adapter.Get()->IsInitialized()) {
callback.Run(scoped_refptr<BluetoothAdapter>(default_adapter.Get()));
} else {
adapter_callbacks.Get().push_back(callback);
}
}
// static
scoped_refptr<BluetoothAdapter> BluetoothAdapterFactory::MaybeGetAdapter() {
return scoped_refptr<BluetoothAdapter>(default_adapter.Get());
}
// static
BluetoothAdapter* BluetoothAdapterFactory::Create(const std::string& address) {
BluetoothAdapter* adapter = NULL;
#if defined(OS_CHROMEOS)
chromeos::BluetoothAdapterChromeOs* adapter_chromeos =
new chromeos::BluetoothAdapterChromeOs;
adapter_chromeos->FindAdapter(address);
adapter = adapter_chromeos;
#elif defined(OS_WIN)
adapter = new BluetoothAdapterWin(base::Bind(&RunAdapterCallbacks));
#endif
return adapter;
}
} // namespace device
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