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| |
| #ifndef QWINDOWSTHREADPOOLRUNNER_H |
| #define QWINDOWSTHREADPOOLRUNNER_H |
| |
| #include <QtCore/qmutex.h> |
| #include <QtCore/qrunnable.h> |
| #include <QtCore/qthreadpool.h> |
| #include <QtCore/qwaitcondition.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| /*! |
| \class QWindowsThreadPoolRunner |
| \brief Runs a task in the global instance of QThreadPool |
| |
| QThreadPool does not provide a method to wait on a single task, so this needs |
| to be done by using QWaitCondition/QMutex. |
| |
| \internal |
| \ingroup qt-lighthouse-win |
| */ |
| class QWindowsThreadPoolRunner |
| { |
| Q_DISABLE_COPY_MOVE(QWindowsThreadPoolRunner) |
| |
| #if QT_CONFIG(thread) |
| template <class RunnableFunction> // nested class implementing QRunnable to execute a function. |
| class Runnable : public QRunnable |
| { |
| public: |
| explicit Runnable(QMutex *m, QWaitCondition *c, RunnableFunction f) |
| : m_mutex(m), m_condition(c), m_function(f) {} |
| |
| void run() override |
| { |
| m_function(); |
| m_mutex->lock(); |
| m_condition->wakeAll(); |
| m_mutex->unlock(); |
| } |
| |
| private: |
| QMutex *m_mutex; |
| QWaitCondition *m_condition; |
| RunnableFunction m_function; |
| }; // class Runnable |
| |
| public: |
| QWindowsThreadPoolRunner() {} |
| |
| template <class Function> |
| bool run(Function f, unsigned long timeOutMSecs = 5000) |
| { |
| QThreadPool *pool = QThreadPool::globalInstance(); |
| Q_ASSERT(pool); |
| Runnable<Function> *runnable = new Runnable<Function>(&m_mutex, &m_condition, f); |
| m_mutex.lock(); |
| pool->start(runnable); |
| const bool ok = m_condition.wait(&m_mutex, timeOutMSecs); |
| m_mutex.unlock(); |
| if (!ok) |
| pool->cancel(runnable); |
| return ok; |
| } |
| |
| private: |
| QMutex m_mutex; |
| QWaitCondition m_condition; |
| #else // QT_CONFIG(thread) |
| public: |
| QWindowsThreadPoolRunner() {} |
| |
| template <class Function> |
| bool run(Function f, unsigned long /* timeOutMSecs */ = 5000) |
| { |
| f(); |
| return true; |
| } |
| #endif // QT_CONFIG(thread) |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif // QWINDOWSTHREADPOOLRUNNER_H |