159 lines
3.7 KiB
C++
159 lines
3.7 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2005 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#include <osg/Referenced>
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#include <osg/Notify>
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#include <osg/ApplicationUsage>
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#include <typeinfo>
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#include <memory>
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#include <OpenThreads/ScopedLock>
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#include <OpenThreads/Mutex>
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#ifndef OSG_JAVA_BUILD
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namespace osg
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{
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static bool s_useThreadSafeReferenceCounting = getenv("OSG_THREAD_SAFE_REF_UNREF")!=0;
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static std::auto_ptr<DeleteHandler> s_deleteHandler(0);
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static ApplicationUsageProxy Referenced_e0(ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_THREAD_SAFE_REF_UNREF","");
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void Referenced::setThreadSafeReferenceCounting(bool enableThreadSafeReferenceCounting)
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{
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s_useThreadSafeReferenceCounting = enableThreadSafeReferenceCounting;
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}
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bool Referenced::getThreadSafeReferenceCounting()
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{
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return s_useThreadSafeReferenceCounting;
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}
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void Referenced::setDeleteHandler(DeleteHandler* handler)
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{
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s_deleteHandler.reset(handler);
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}
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DeleteHandler* Referenced::getDeleteHandler()
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{
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return s_deleteHandler.get();
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}
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Referenced::Referenced()
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{
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if (s_useThreadSafeReferenceCounting) _refMutex = new OpenThreads::Mutex;
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else _refMutex = 0;
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_refCount=0;
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}
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Referenced::Referenced(const Referenced&)
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{
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if (s_useThreadSafeReferenceCounting) _refMutex = new OpenThreads::Mutex;
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else _refMutex = 0;
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_refCount=0;
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}
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Referenced::~Referenced()
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{
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if (_refCount>0)
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{
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notify(WARN)<<"Warning: deleting still referenced object "<<this<<" of type '"<<typeid(this).name()<<"'"<<std::endl;
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notify(WARN)<<" the final reference count was "<<_refCount<<", memory corruption possible."<<std::endl;
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}
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if (_refMutex)
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{
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OpenThreads::Mutex* tmpMutexPtr = _refMutex;
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_refMutex = 0;
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delete tmpMutexPtr;
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}
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}
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void Referenced::setThreadSafeRefUnref(bool threadSafe)
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{
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if (threadSafe)
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{
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if (!_refMutex)
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{
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// we want thread safe ref()/unref() so assing a mutex
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_refMutex = new OpenThreads::Mutex;
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}
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}
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else
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{
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if (_refMutex)
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{
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// we don't want thread safe ref()/unref() so remove any assigned mutex
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OpenThreads::Mutex* tmpMutexPtr = _refMutex;
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_refMutex = 0;
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delete tmpMutexPtr;
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}
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}
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}
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/*
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void Referenced::ref() const
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{
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if (_refMutex)
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(*_refMutex);
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++_refCount;
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}
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else
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{
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++_refCount;
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}
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}
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void Referenced::unref() const
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{
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bool needDelete = false;
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if (_refMutex)
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(*_refMutex);
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--_refCount;
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needDelete = _refCount<=0;
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}
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else
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{
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--_refCount;
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needDelete = _refCount<=0;
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}
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if (needDelete)
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{
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if (getDeleteHandler()) getDeleteHandler()->requestDelete(this);
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else delete this;
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}
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}
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*/
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void Referenced::unref_nodelete() const
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{
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if (_refMutex)
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(*_refMutex);
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--_refCount;
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}
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else
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{
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--_refCount;
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}
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}
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}; // end of namespace osg
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#endif //OSG_JAVA_BUILD
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