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