1/* 2 * Copyright (C) 2011 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 "MemoryPressureHandler.h" 28 29#include <wtf/StdLibExtras.h> 30 31namespace WebCore { 32 33MemoryPressureHandler& memoryPressureHandler() 34{ 35 DEFINE_STATIC_LOCAL(MemoryPressureHandler, staticMemoryPressureHandler, ()); 36 return staticMemoryPressureHandler; 37} 38 39MemoryPressureHandler::MemoryPressureHandler() 40 : m_installed(false) 41 , m_lastRespondTime(0) 42 , m_lowMemoryHandler(releaseMemory) 43{ 44} 45 46#if !PLATFORM(MAC) || PLATFORM(IOS) || __MAC_OS_X_VERSION_MIN_REQUIRED == 1060 47 48void MemoryPressureHandler::install() { } 49void MemoryPressureHandler::uninstall() { } 50void MemoryPressureHandler::holdOff(unsigned) { } 51void MemoryPressureHandler::respondToMemoryPressure() { } 52void MemoryPressureHandler::releaseMemory(bool) { } 53 54#endif 55 56} // namespace WebCore 57