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/*
* Copyright 2010 The Android Open Source Project
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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 THE COPYRIGHT HOLDERS ``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 THE COPYRIGHT OWNER 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 "MemoryUsage.h"
#include <malloc.h>
#include <wtf/CurrentTime.h>
#if USE(V8)
#include <v8.h>
#endif // USE(V8)
using namespace WTF;
class MemoryUsageCache {
public:
MemoryUsageCache()
: m_cachedMemoryUsage(0)
, m_cacheTime(0)
{
}
int getCachedMemoryUsage(bool forceFresh);
private:
unsigned m_cachedMemoryUsage;
double m_cacheTime;
static const int CACHE_VALIDITY_MS = 2000;
};
int MemoryUsageCache::getCachedMemoryUsage(bool forceFresh)
{
if (!forceFresh && currentTimeMS() <= m_cacheTime + CACHE_VALIDITY_MS)
return m_cachedMemoryUsage;
struct mallinfo minfo = mallinfo();
m_cachedMemoryUsage = (minfo.hblkhd + minfo.arena) >> 20;
#if USE(V8)
v8::HeapStatistics stat;
v8::V8::GetHeapStatistics(&stat);
unsigned v8Usage = stat.total_heap_size() >> 20;
m_cachedMemoryUsage += v8Usage;
#endif // USE(V8)
m_cacheTime = currentTimeMS();
return m_cachedMemoryUsage;
}
int MemoryUsage::memoryUsageMb(bool forceFresh)
{
static MemoryUsageCache cache;
return cache.getCachedMemoryUsage(forceFresh);
}
int MemoryUsage::m_lowMemoryUsageMb = 0;
int MemoryUsage::m_highMemoryUsageMb = 0;
int MemoryUsage::m_highUsageDeltaMb = 0;
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