1/* 2 * Copyright (C) 2008 Apple Inc. All Rights Reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "NetworkStateNotifier.h" 28 29#if PLATFORM(IOS) 30#include "Settings.h" 31#endif 32 33#include <mutex> 34#include <wtf/Assertions.h> 35#include <wtf/NeverDestroyed.h> 36 37namespace WebCore { 38 39NetworkStateNotifier& networkStateNotifier() 40{ 41 static std::once_flag onceFlag; 42 static LazyNeverDestroyed<NetworkStateNotifier> networkStateNotifier; 43 44 std::call_once(onceFlag, []{ 45 networkStateNotifier.construct(); 46 }); 47 48 return networkStateNotifier; 49} 50 51void NetworkStateNotifier::addNetworkStateChangeListener(std::function<void (bool)> listener) 52{ 53 ASSERT(listener); 54#if PLATFORM(IOS) 55 if (Settings::shouldOptOutOfNetworkStateObservation()) 56 return; 57 registerObserverIfNecessary(); 58#endif 59 60 m_listeners.append(WTF::move(listener)); 61} 62 63void NetworkStateNotifier::notifyNetworkStateChange() const 64{ 65 for (const auto& listener : m_listeners) 66 listener(m_isOnLine); 67} 68 69} // namespace WebCore 70