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baseThread.cpp
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baseThread.cpp
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#include "baseThread.h"
baseTransform* const baseThread::endTransform = 0;
baseThread* baseThread::instance = 0;
baseThread::baseThread(void)
{
start();
}
baseThread::~baseThread(void)
{
{
QMutexLocker locker(&mutex);
while (!transformQuene.isEmpty())
{
delete transformQuene.dequeue();
}
// mark the empty event of the transaction queue to restore ui state
transformQuene.enqueue(endTransform);
transformAdded.wakeOne();
}
wait();
}
baseThread* baseThread::GetInstance()
{
if (instance == 0)
{
instance = new baseThread();
}
return instance;
}
void baseThread::Destroy()
{
if (instance != 0)
{
delete instance;
instance = 0;
}
}
void baseThread::addTransform(baseTransform* trans)
{
QMutexLocker locker(&mutex);
transformQuene.enqueue(trans);
transformAdded.wakeOne();
}
void baseThread::run()
{
baseTransform* curTransform = 0;
forever
{
{
// get transform from the transform queue
// if there is no transform in the quene, wait
QMutexLocker locker(&mutex);
if (transformQuene.isEmpty())
{
transformAdded.wait(&mutex);
}
// if there is still transform undone, get the transform
curTransform = transformQuene.dequeue();
// if the transform is endTransform, break the forever loop, thus run function ends
if (curTransform == endTransform)
{
break;
}
}
// delet the transform after transform done
emit transformStarted();
curTransform->apply();
delete curTransform;
// after deleting the transform fetched out just now, check the transform queue again
// if there is no transform in the queue, signal that all transfom done
{
QMutexLocker locker(&mutex);
if (transformQuene.isEmpty())
{
emit allTransformDone();
}
}
}
}