qsparql_tracker_direct_result_p.h

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#ifndef QSPARQL_TRACKER_DIRECT_RESULT_P_H
#define QSPARQL_TRACKER_DIRECT_RESULT_P_H
 
#include <qsparqlresult.h>
#include <qsparqlqueryoptions.h>
#include <QtCore/qrunnable.h>
#include <QtCore/qthreadpool.h>
#include <QtCore/qsemaphore.h>
 
QT_BEGIN_HEADER
 
QT_BEGIN_NAMESPACE
 
class QTrackerDirectDriverPrivate;
class QTrackerDirectQueryRunner;
 
class QTrackerDirectResult : public QSparqlResult
{
    Q_OBJECT
    friend class QTrackerDirectQueryRunner;
public:
    QTrackerDirectResult(const QSparqlQueryOptions& options);
    ~QTrackerDirectResult();
 
    virtual bool isFinished() const;
    QSparqlQueryOptions options;
private:
    // Will be called by the query runner to execute the query, results that don't
    // need a thread to run in (sync) do not need to implement this
    virtual void run() {}
    virtual void stopAndWait() = 0;
 
protected:
    QTrackerDirectDriverPrivate *driverPrivate;
    QAtomicInt resultFinished;
    QTrackerDirectQueryRunner *queryRunner;
 
public Q_SLOTS:
    virtual void exec() = 0;
    void driverClosing();
 
};
 
class QTrackerDirectQueryRunner : public QRunnable
{
public:
    QTrackerDirectResult *result;
    QAtomicInt runFinished;
    QSemaphore runSemaphore;
    bool started;
 
    QTrackerDirectQueryRunner(QTrackerDirectResult *result);
    void runOrWait();
    void queue(QThreadPool& threadPool);
    void wait();
 
private:
    void run();
    bool acquireRunSemaphore();
 
};
 
QT_END_NAMESPACE
 
QT_END_HEADER
 
#endif // QSPARQL_TRACKER_DIRECT_RESULT_P_H