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Added an osgDB::ReadWriteMutex to help manage the ability to have serialize

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write to objects but allow multiple threads to read at once in a read only way.
This commit is contained in:
Robert Osfield
2006-12-27 16:40:34 +00:00
parent cd133e5f2c
commit 30cb8735d3
8 changed files with 140 additions and 18 deletions
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20
src/osgParticle/ParticleSystemUpdater.cpp
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@@ -27,32 +27,30 @@ void osgParticle::ParticleSystemUpdater::traverse(osg::NodeVisitor& nv)
{
if (nv.getFrameStamp())
{
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_cullUpdatelMutex);
//added 1/17/06- bgandere@nps.edu
//ensures ParticleSystem will only be updated once per frame
//regardless of the number of cameras viewing it
if( _frameNumber < nv.getFrameStamp()->getFrameNumber())
{
_frameNumber = nv.getFrameStamp()->getFrameNumber();
double t = nv.getFrameStamp()->getReferenceTime();
if (_t0 != -1)
if (_t0 != -1.0)
{
ParticleSystem_Vector::iterator i;
for (i=_psv.begin(); i!=_psv.end(); ++i)
{
if (!i->get()->isFrozen() && (i->get()->getLastFrameNumber() >= (nv.getFrameStamp()->getFrameNumber() - 1) || !i->get()->getFreezeOnCull()))
ParticleSystem* ps = i->get();
osgDB::ScopedWriteLock lock(ps->getReadWriteMutex());
if (!ps->isFrozen() && (ps->getLastFrameNumber() >= (nv.getFrameStamp()->getFrameNumber() - 1) || !ps->getFreezeOnCull()))
{
i->get()->update(t - _t0);
ps->update(t - _t0);
}
}
}
_t0 = t;
}
//added- 1/17/06- bgandere@nps.edu
//set frame number to the current frame number
_frameNumber = nv.getFrameStamp()->getFrameNumber();
}
else
{