1/* 2 * Copyright (C) 2009 Apple Inc. All Rights Reserved. 3 * Copyright (C) 2012 Igalia S.L. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#ifndef DNSResolveQueue_h 28#define DNSResolveQueue_h 29 30#include "Timer.h" 31#include <atomic> 32#include <wtf/Forward.h> 33#include <wtf/HashSet.h> 34#include <wtf/text/StringHash.h> 35 36namespace WebCore { 37 38class DNSResolveQueue { 39 friend NeverDestroyed<DNSResolveQueue>; 40 41public: 42 static DNSResolveQueue& shared(); 43 44 void add(const String& hostname); 45 void decrementRequestCount() 46 { 47 --m_requestsInFlight; 48 } 49 50private: 51 DNSResolveQueue(); 52 53 bool isUsingProxy(); 54 55 bool platformProxyIsEnabledInSystemPreferences(); 56 void platformResolve(const String&); 57 58 void timerFired(Timer<DNSResolveQueue>&); 59 60 Timer<DNSResolveQueue> m_timer; 61 62 HashSet<String> m_names; 63 std::atomic<int> m_requestsInFlight; 64 bool m_cachedProxyEnabledStatus; 65 double m_lastProxyEnabledStatusCheckTime; 66}; 67 68} 69 70#endif // DNSResolveQueue_h 71