trylocker.h

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#ifndef THREADING_UTILS_TRYLOCKER_H
#define THREADING_UTILS_TRYLOCKER_H
 
#include <QtGlobal>
 
QT_FORWARD_DECLARE_CLASS(QMutex)
 
namespace QtUtilities {
 
template <typename Mutex = QMutex> class TryLocker {
public:
    TryLocker(Mutex &mutex)
        : m_mutex(mutex.tryLock() ? &mutex : nullptr)
    {
    }
 
    ~TryLocker()
    {
        if (m_mutex) {
            m_mutex->unlock();
        }
    }
 
    bool isLocked() const
    {
        return m_mutex != nullptr;
    }
 
    operator bool() const
    {
        return m_mutex != nullptr;
    }
 
private:
    Mutex *m_mutex;
};
} // namespace QtUtilities
 
#endif // THREADING_UTILS_TRYLOCKER_H