/* * Copyright (C) 2011 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. */ #include "config.h" #include "MemoryPressureHandler.h" #include <wtf/StdLibExtras.h> namespace WebCore { MemoryPressureHandler& memoryPressureHandler() { DEFINE_STATIC_LOCAL(MemoryPressureHandler, staticMemoryPressureHandler, ()); return staticMemoryPressureHandler; } MemoryPressureHandler::MemoryPressureHandler() : m_installed(false) , m_lastRespondTime(0) , m_lowMemoryHandler(releaseMemory) #if PLATFORM(IOS) , m_receivedMemoryPressure(0) , m_memoryPressureReason(MemoryPressureReasonNone) , m_clearPressureOnMemoryRelease(true) , m_releaseMemoryBlock(0) , m_observer(0) #endif { } #if !PLATFORM(MAC) || PLATFORM(IOS) || __MAC_OS_X_VERSION_MIN_REQUIRED == 1060 void MemoryPressureHandler::install() { } void MemoryPressureHandler::uninstall() { } void MemoryPressureHandler::holdOff(unsigned) { } void MemoryPressureHandler::respondToMemoryPressure() { } #if !PLATFORM(IOS) void MemoryPressureHandler::releaseMemory(bool) { } #endif // !PLATFORM(IOS) #endif } // namespace WebCore