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 COMPUTER, 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 <wtf/Forward.h> 32#include <wtf/HashSet.h> 33#include <wtf/text/StringHash.h> 34 35namespace WebCore { 36 37class DNSResolveQueue : public TimerBase { 38 39public: 40 static DNSResolveQueue& shared() 41 { 42 DEFINE_STATIC_LOCAL(DNSResolveQueue, queue, ()); 43 return queue; 44 } 45 46 void add(const String& hostname); 47 void decrementRequestCount() 48 { 49 atomicDecrement(&m_requestsInFlight); 50 } 51 52private: 53 DNSResolveQueue(); 54 55 bool isUsingProxy(); 56 57 bool platformProxyIsEnabledInSystemPreferences(); 58 void platformResolve(const String&); 59 60 void fired(); 61 62 HashSet<String> m_names; 63 int m_requestsInFlight; 64 bool m_cachedProxyEnabledStatus; 65 double m_lastProxyEnabledStatusCheckTime; 66}; 67 68} 69 70#endif // DNSResolveQueue_h 71