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// Copyright (c) 2011 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 "net/base/network_change_notifier.h"
#include "net/base/network_change_notifier_factory.h"
#include "build/build_config.h"
#if defined(OS_WIN)
#include "net/base/network_change_notifier_win.h"
#elif defined(OS_LINUX) || defined(OS_ANDROID)
#include "net/base/network_change_notifier_linux.h"
#elif defined(OS_MACOSX)
#include "net/base/network_change_notifier_mac.h"
#endif
namespace net {
namespace {
// The actual singleton notifier. The class contract forbids usage of the API
// in ways that would require us to place locks around access to this object.
// (The prohibition on global non-POD objects makes it tricky to do such a thing
// anyway.)
NetworkChangeNotifier* g_network_change_notifier = NULL;
// Class factory singleton.
NetworkChangeNotifierFactory* g_network_change_notifier_factory = NULL;
class MockNetworkChangeNotifier : public NetworkChangeNotifier {
public:
virtual bool IsCurrentlyOffline() const { return false; }
};
} // namespace
NetworkChangeNotifier::~NetworkChangeNotifier() {
DCHECK_EQ(this, g_network_change_notifier);
g_network_change_notifier = NULL;
}
// static
void NetworkChangeNotifier::SetFactory(
NetworkChangeNotifierFactory* factory) {
CHECK(!g_network_change_notifier_factory);
g_network_change_notifier_factory = factory;
}
// static
NetworkChangeNotifier* NetworkChangeNotifier::Create() {
if (g_network_change_notifier_factory)
return g_network_change_notifier_factory->CreateInstance();
#if defined(OS_WIN)
return new NetworkChangeNotifierWin();
#elif defined(OS_CHROMEOS)
// ChromeOS builds MUST use its own class factory.
CHECK(false);
return NULL;
#elif defined(OS_LINUX) || defined(OS_ANDROID)
return new NetworkChangeNotifierLinux();
#elif defined(OS_MACOSX)
return new NetworkChangeNotifierMac();
#else
NOTIMPLEMENTED();
return NULL;
#endif
}
// static
bool NetworkChangeNotifier::IsOffline() {
return g_network_change_notifier &&
g_network_change_notifier->IsCurrentlyOffline();
}
// static
NetworkChangeNotifier* NetworkChangeNotifier::CreateMock() {
return new MockNetworkChangeNotifier();
}
void NetworkChangeNotifier::AddIPAddressObserver(IPAddressObserver* observer) {
if (g_network_change_notifier)
g_network_change_notifier->ip_address_observer_list_->AddObserver(observer);
}
void NetworkChangeNotifier::AddOnlineStateObserver(
OnlineStateObserver* observer) {
if (g_network_change_notifier) {
g_network_change_notifier->online_state_observer_list_->AddObserver(
observer);
}
}
void NetworkChangeNotifier::RemoveIPAddressObserver(
IPAddressObserver* observer) {
if (g_network_change_notifier) {
g_network_change_notifier->ip_address_observer_list_->RemoveObserver(
observer);
}
}
void NetworkChangeNotifier::RemoveOnlineStateObserver(
OnlineStateObserver* observer) {
if (g_network_change_notifier) {
g_network_change_notifier->online_state_observer_list_->RemoveObserver(
observer);
}
}
NetworkChangeNotifier::NetworkChangeNotifier()
: ip_address_observer_list_(
new ObserverListThreadSafe<IPAddressObserver>(
ObserverListBase<IPAddressObserver>::NOTIFY_EXISTING_ONLY)),
online_state_observer_list_(
new ObserverListThreadSafe<OnlineStateObserver>(
ObserverListBase<OnlineStateObserver>::NOTIFY_EXISTING_ONLY)) {
DCHECK(!g_network_change_notifier);
g_network_change_notifier = this;
}
void NetworkChangeNotifier::NotifyObserversOfIPAddressChange() {
if (g_network_change_notifier) {
g_network_change_notifier->ip_address_observer_list_->Notify(
&IPAddressObserver::OnIPAddressChanged);
}
}
void NetworkChangeNotifier::NotifyObserversOfOnlineStateChange() {
if (g_network_change_notifier) {
g_network_change_notifier->online_state_observer_list_->Notify(
&OnlineStateObserver::OnOnlineStateChanged, !IsOffline());
}
}
} // namespace net
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