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// Copyright (c) 2010 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 "build/build_config.h"
#if defined(OS_WIN)
#include "net/base/network_change_notifier_win.h"
#elif defined(OS_LINUX)
#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;
} // namespace
NetworkChangeNotifier::~NetworkChangeNotifier() {
DCHECK_EQ(this, g_network_change_notifier);
g_network_change_notifier = NULL;
}
NetworkChangeNotifier* NetworkChangeNotifier::Create() {
#if defined(OS_WIN)
return new NetworkChangeNotifierWin();
#elif defined(OS_LINUX)
return new NetworkChangeNotifierLinux();
#elif defined(OS_MACOSX)
return new NetworkChangeNotifierMac();
#else
NOTIMPLEMENTED();
return NULL;
#endif
}
void NetworkChangeNotifier::AddObserver(Observer* observer) {
if (g_network_change_notifier)
g_network_change_notifier->observer_list_->AddObserver(observer);
}
void NetworkChangeNotifier::RemoveObserver(Observer* observer) {
if (g_network_change_notifier)
g_network_change_notifier->observer_list_->RemoveObserver(observer);
}
NetworkChangeNotifier::NetworkChangeNotifier()
: observer_list_(new ObserverListThreadSafe<Observer>()) {
DCHECK(!g_network_change_notifier);
g_network_change_notifier = this;
}
void NetworkChangeNotifier::NotifyObserversOfIPAddressChange() {
if (g_network_change_notifier) {
g_network_change_notifier->observer_list_->Notify(
&Observer::OnIPAddressChanged);
}
}
} // namespace net
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