/* * Copyright (C) 2008-2017 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #pragma once #include <wtf/Forward.h> #include <wtf/RetainPtr.h> #include "Timer.h" #if PLATFORM(IOS_FAMILY) OBJC_CLASS WebNetworkStateObserver; #endif #if PLATFORM(MAC) typedef const struct __SCDynamicStore * SCDynamicStoreRef; #endif #if PLATFORM(WIN) #include <windows.h> #endif namespace WebCore { class NetworkStateNotifier { WTF_MAKE_NONCOPYABLE(NetworkStateNotifier); public: WEBCORE_EXPORT static NetworkStateNotifier& singleton(); WEBCORE_EXPORT bool onLine(); WEBCORE_EXPORT void addListener(WTF::Function<void(bool isOnLine)>&&); private: friend NeverDestroyed<NetworkStateNotifier>; NetworkStateNotifier(); void updateStateWithoutNotifying(); void updateState(); void updateStateSoon(); void startObserving(); #if PLATFORM(WIN) void registerForAddressChange(); static void CALLBACK addressChangeCallback(void*, BOOLEAN timedOut); #endif #if USE(GLIB) static void networkChangedCallback(NetworkStateNotifier*); #endif Optional<bool> m_isOnLine; Vector<WTF::Function<void(bool)>> m_listeners; Timer m_updateStateTimer; #if PLATFORM(IOS_FAMILY) RetainPtr<WebNetworkStateObserver> m_observer; #endif #if PLATFORM(MAC) RetainPtr<SCDynamicStoreRef> m_store; #endif #if PLATFORM(WIN) HANDLE m_waitHandle; OVERLAPPED m_overlapped; #endif }; } // namespace WebCore