void ThreadPool::start() {
if (started) return;
for (int i=0; i<threadCount; ++i) {
TaskThread* thread = new TaskThread();
threads << thread;
thread->start();
}
started = true;
}
NPT_Result TaskGroup::startNewThread(Task *task)
{
TaskThread *thread = new TaskThread(this);
WriteLocker locker(m_threadListLock);
m_threadList.Add(thread);
NPT_Result nr = thread->start(task);
if (NPT_FAILED(nr)) {
m_threadList.Remove(thread);
delete thread;
delete task;
}
return nr;
}
void ThreadPool::start()
{
if (m_started)
{
return;
}
for (int i = 0;i<m_threadCount;++i)
{
TaskThread * thread = new TaskThread();
m_threads << thread;
thread->start();
}
m_started = true;
}
void
TaskService::adjustThreadCount()
{
OpenThreads::ScopedLock<OpenThreads::ReentrantMutex> lock(_threadMutex);
removeFinishedThreads();
int numActiveThreads = 0;
for( TaskThreads::iterator i = _threads.begin(); i != _threads.end(); i++ )
{
if (!(*i)->getDone()) numActiveThreads++;
}
int diff = _numThreads - numActiveThreads;
if (diff > 0)
{
OE_DEBUG << LC << "Adding " << diff << " threads to TaskService " << std::endl;
//We need to add some threads
for (int i = 0; i < diff; ++i)
{
TaskThread* thread = new TaskThread( _queue.get() );
_threads.push_back( thread );
thread->start();
}
}
else if (diff < 0)
{
diff = osg::absolute( diff );
OE_DEBUG << LC << "Removing " << diff << " threads from TaskService " << std::endl;
int numRemoved = 0;
//We need to remove some threads
for( TaskThreads::iterator i = _threads.begin(); i != _threads.end(); i++ )
{
if (!(*i)->getDone())
{
(*i)->setDone( true );
numRemoved++;
if (numRemoved == diff) break;
}
}
}
OE_INFO << LC << "TaskService [" << _name << "] using " << _numThreads << " threads" << std::endl;
}