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refs #334 VATSIM threaded reader classes using CContinuousWorker.

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This commit is contained in:
Mathew Sutcliffe
2014-11-16 00:43:08 +00:00
committed by Roland Winklmeier
parent 195c909ca0
commit 54e883c322
6 changed files with 27 additions and 56 deletions
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45
src/blackmisc/threadedreader.h
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@@ -12,6 +12,7 @@
//! \file
#include "worker.h"
#include <QReadWriteLock>
#include <QDateTime>
#include <QTimer>
@@ -27,17 +28,9 @@ namespace BlackMisc
*
* \remarks Header only class to avoid forward instantiations across subprojects
*/
template <class FutureRet = void> class CThreadedReader
template <class FutureRet = void> class CThreadedReader : public CContinuousWorker
{
public:
//! Destructor
virtual ~CThreadedReader()
{
this->stop();
delete m_updateTimer;
}
//! Thread safe, set update timestamp
//! \threadsafe
QDateTime getUpdateTimestamp() const
@@ -54,16 +47,9 @@ namespace BlackMisc
this->m_updateTimestamp = updateTimestamp;
}
//! Thread safe, mark as stopped
//! \threadsafe
virtual void stop()
//! \copydoc CContinuousWorker::cleanup
virtual void cleanup() override
{
if (this->isStopped()) return;
// thread safe stopping timer and mark as stopped
this->setStopFlag();
this->setInterval(0);
// shutdown pending
QWriteLocker(&this->m_lock);
if (this->m_pendingFuture.isRunning())
@@ -76,21 +62,12 @@ namespace BlackMisc
if (this->m_pendingNetworkReply && this->m_pendingNetworkReply->isRunning())
{
this->m_pendingNetworkReply->abort();
QCoreApplication::processEvents(QEventLoop::AllEvents, 250); // allow the abort to be called
}
// cancel or stop flag above should terminate QFuture
this->m_pendingFuture.waitForFinished();
}
//! Thread safe, is in state stopped?
//! \threadsafe
bool isStopped() const
{
QReadLocker rl(&this->m_lock);
return this->m_stopped;
}
/*!
* Set the update time
* \param updatePeriodMs <=0 stops the timer
@@ -116,9 +93,9 @@ namespace BlackMisc
protected:
//! Constructor
CThreadedReader() : m_lock(QReadWriteLock::Recursive)
CThreadedReader(QObject *owner) : CContinuousWorker(owner),
m_updateTimer(new QTimer(this)), m_lock(QReadWriteLock::Recursive)
{
this->m_updateTimer = new QTimer();
}
//! Has pending network replay
@@ -137,20 +114,12 @@ namespace BlackMisc
this->m_pendingFuture = future;
}
//! Thread safe, mark as to be stopped
//! \threadsafe
void setStopFlag()
{
QWriteLocker wl(&this->m_lock);
this->m_stopped = true;
}
QTimer *m_updateTimer = nullptr; //!< update timer
mutable QReadWriteLock m_lock; //!< lock
private:
QDateTime m_updateTimestamp; //!< when was file / resource read
bool m_stopped = false; //!< mark as stopped, threads should terminate
QFuture<FutureRet> m_pendingFuture; //!< optional future to be stopped
QNetworkReply *m_pendingNetworkReply = nullptr; //!< optional network reply to be stopped
};