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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <graphic/Manager.hxx>
#include <impgraph.hxx>
#include <sal/log.hxx>
#include <officecfg/Office/Common.hxx>
#include <unotools/configmgr.hxx>
using namespace css;
namespace
{
void setupConfigurationValuesIfPossible(sal_Int64& rMemoryLimit,
std::chrono::seconds& rAllowedIdleTime, bool& bSwapEnabled)
{
if (comphelper::IsFuzzing())
return;
try
{
using officecfg::Office::Common::Cache;
rMemoryLimit = Cache::GraphicManager::GraphicMemoryLimit::get();
rAllowedIdleTime
= std::chrono::seconds(Cache::GraphicManager::GraphicAllowedIdleTime::get());
bSwapEnabled = Cache::GraphicManager::GraphicSwappingEnabled::get();
}
catch (...)
{
}
}
}
namespace vcl::graphic
{
MemoryManager::MemoryManager()
: maSwapOutTimer("MemoryManager::MemoryManager maSwapOutTimer")
{
setupConfigurationValuesIfPossible(mnMemoryLimit, mnAllowedIdleTime, mbSwapEnabled);
if (mbSwapEnabled)
{
maSwapOutTimer.SetInvokeHandler(LINK(this, MemoryManager, ReduceMemoryTimerHandler));
maSwapOutTimer.SetTimeout(mnTimeout);
maSwapOutTimer.Start();
}
}
MemoryManager& MemoryManager::get()
{
static MemoryManager gStaticManager;
return gStaticManager;
}
IMPL_LINK(MemoryManager, ReduceMemoryTimerHandler, Timer*, pTimer, void)
{
std::unique_lock aGuard(maMutex);
pTimer->Stop();
reduceMemory(aGuard);
pTimer->Start();
}
void MemoryManager::registerObject(MemoryManaged* pMemoryManaged)
{
std::unique_lock aGuard(maMutex);
// Insert and update the used size (bytes)
assert(aGuard.owns_lock() && aGuard.mutex() == &maMutex);
// coverity[missing_lock: FALSE] - as above assert
mnTotalSize += pMemoryManaged->getCurrentSizeInBytes();
maObjectList.insert(pMemoryManaged);
}
void MemoryManager::unregisterObject(MemoryManaged* pMemoryManaged)
{
std::unique_lock aGuard(maMutex);
mnTotalSize -= pMemoryManaged->getCurrentSizeInBytes();
maObjectList.erase(pMemoryManaged);
}
void MemoryManager::changeExisting(MemoryManaged* pMemoryManaged, sal_Int64 nNewSize)
{
std::scoped_lock aGuard(maMutex);
sal_Int64 nOldSize = pMemoryManaged->getCurrentSizeInBytes();
mnTotalSize -= nOldSize;
mnTotalSize += nNewSize;
pMemoryManaged->setCurrentSizeInBytes(nNewSize);
}
void MemoryManager::swappedIn(MemoryManaged* pMemoryManaged, sal_Int64 nNewSize)
{
changeExisting(pMemoryManaged, nNewSize);
}
void MemoryManager::swappedOut(MemoryManaged* pMemoryManaged, sal_Int64 nNewSize)
{
changeExisting(pMemoryManaged, nNewSize);
}
void MemoryManager::reduceAllAndNow()
{
std::unique_lock aGuard(maMutex);
reduceMemory(aGuard, true);
}
void MemoryManager::dumpState(rtl::OStringBuffer& rState)
{
std::unique_lock aGuard(maMutex);
rState.append("\nMemory Manager items:\t");
rState.append(static_cast<sal_Int32>(maObjectList.size()));
rState.append("\tsize:\t");
rState.append(static_cast<sal_Int64>(mnTotalSize / 1024));
rState.append("\tkb");
for (MemoryManaged* pMemoryManaged : maObjectList)
{
pMemoryManaged->dumpState(rState);
}
}
void MemoryManager::reduceMemory(std::unique_lock<std::mutex>& rGuard, bool bDropAll)
{
// maMutex is locked in callers
if (!mbSwapEnabled)
return;
if (mnTotalSize < mnMemoryLimit && !bDropAll)
return;
// avoid recursive reduceGraphicMemory on reexport of tdf118346-1.odg to odg
if (mbReducingGraphicMemory)
return;
mbReducingGraphicMemory = true;
loopAndReduceMemory(rGuard, bDropAll);
mbReducingGraphicMemory = false;
}
void MemoryManager::loopAndReduceMemory(std::unique_lock<std::mutex>& rGuard, bool bDropAll)
{
// make a copy of m_pImpGraphicList because if we swap out a svg, the svg
// filter may create more temp Graphics which are auto-added to
// m_pImpGraphicList invalidating a loop over m_pImpGraphicList, e.g.
// reexport of tdf118346-1.odg
o3tl::sorted_vector<MemoryManaged*> aObjectListCopy = maObjectList;
for (MemoryManaged* pMemoryManaged : aObjectListCopy)
{
if (!pMemoryManaged->canReduceMemory())
continue;
sal_Int64 nCurrentSizeInBytes = pMemoryManaged->getCurrentSizeInBytes();
if (nCurrentSizeInBytes > mnSmallFrySize || bDropAll) // ignore small-fry
{
auto aCurrent = std::chrono::high_resolution_clock::now();
auto aDeltaTime = aCurrent - pMemoryManaged->getLastUsed();
auto aSeconds = std::chrono::duration_cast<std::chrono::seconds>(aDeltaTime);
if (aSeconds > mnAllowedIdleTime)
{
// unlock because svgio can call back into us
rGuard.unlock();
pMemoryManaged->reduceMemory();
rGuard.lock();
}
}
}
}
} // end vcl::graphic
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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