KisDocument::Private::StrippedSafeSavingLocker Class Reference

Public Member Functions
	StrippedSafeSavingLocker (QMutex *savingMutex, KisImageSP image)
bool	successfullyLocked () const
	~StrippedSafeSavingLocker ()

Private Attributes
KisImageSP	m_image
KisImageReadOnlyBarrierLock	m_imageLock
bool	m_locked
QMutex *	m_savingLock

Detailed Description

Definition at line 554 of file KisDocument.cpp.

Constructor & Destructor Documentation

StrippedSafeSavingLocker()

KisDocument::Private::StrippedSafeSavingLocker::StrippedSafeSavingLocker ( QMutex * savingMutex, KisImageSP image )

inline

Initial try to lock both objects. Locking the image guards us from any image composition threads running in the background, while savingMutex guards us from entering the saving code twice by autosave and main threads.

Since we are trying to lock multiple objects, so we should do it in a safe manner.

Definition at line 556 of file KisDocument.cpp.

        : m_locked(false)
        , m_image(image)
        , m_savingLock(savingMutex)
        , m_imageLock(image, std::defer_lock)
 
    {
        m_locked = std::try_lock(m_imageLock, *m_savingLock) < 0;
 
        if (!m_locked) {
            m_image->requestStrokeEnd();
            QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
 
            // one more try...
            m_locked = std::try_lock(m_imageLock, *m_savingLock) < 0;
        }
    }

References m_image, m_imageLock, m_locked, m_savingLock, and KisImage::requestStrokeEnd().

~StrippedSafeSavingLocker()

KisDocument::Private::StrippedSafeSavingLocker::~StrippedSafeSavingLocker ( )

inline

Definition at line 583 of file KisDocument.cpp.

                                {
        if (m_locked) {
            m_imageLock.unlock();
            m_savingLock->unlock();
        }
    }

References m_imageLock, m_locked, and m_savingLock.

Member Function Documentation

successfullyLocked()

bool KisDocument::Private::StrippedSafeSavingLocker::successfullyLocked ( ) const

inline

Definition at line 590 of file KisDocument.cpp.

                                    {
        return m_locked;
    }

References m_locked.

Member Data Documentation

m_image

KisImageSP KisDocument::Private::StrippedSafeSavingLocker::m_image

private

Definition at line 598 of file KisDocument.cpp.

m_imageLock

KisImageReadOnlyBarrierLock KisDocument::Private::StrippedSafeSavingLocker::m_imageLock

private

Definition at line 600 of file KisDocument.cpp.

m_locked

bool KisDocument::Private::StrippedSafeSavingLocker::m_locked

private

Definition at line 597 of file KisDocument.cpp.

m_savingLock

QMutex* KisDocument::Private::StrippedSafeSavingLocker::m_savingLock

private

Definition at line 599 of file KisDocument.cpp.

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The documentation for this class was generated from the following file:

• libs/ui/KisDocument.cpp