File indexing completed on 2024-05-12 15:57:03

 /*
  *  SPDX-FileCopyrightText: 2021 Dmitry Kazakov <dimula73@gmail.com>
  *
  *  SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #include "KisSynchronizedConnection.h"
 
 #include <QThread>
 #include <QCoreApplication>
 #include <kis_assert.h>
 
 /**
  * @brief The KisSynchronizedConnectionEventTypeRegistrar is a simple
  * class to register QEvent type in the Qt's system
  */
 struct KisSynchronizedConnectionEventTypeRegistrar
 {
     KisSynchronizedConnectionEventTypeRegistrar() {
         eventType = QEvent::registerEventType(QEvent::User + 1000);
     }
 
     int eventType = -1;
 };
 
 struct KisBarrierCallbackContainer
 {
     std::function<void()> callback;
 };
 
 Q_GLOBAL_STATIC(KisSynchronizedConnectionEventTypeRegistrar, s_instance)
 Q_GLOBAL_STATIC(KisBarrierCallbackContainer, s_barrier)
 
 
 /************************************************************************/
 /*            KisSynchronizedConnectionEvent                            */
 /************************************************************************/
 
 KisSynchronizedConnectionEvent::KisSynchronizedConnectionEvent(QObject *_destination)
     : QEvent(QEvent::Type(s_instance->eventType)),
       destination(_destination)
 {
 }
 
 KisSynchronizedConnectionEvent::KisSynchronizedConnectionEvent(const KisSynchronizedConnectionEvent &rhs)
     : QEvent(QEvent::Type(s_instance->eventType)),
       destination(rhs.destination)
 {
 }
 
 KisSynchronizedConnectionEvent::~KisSynchronizedConnectionEvent()
 {
 }
 
 /************************************************************************/
 /*            KisSynchronizedConnectionBase                             */
 /************************************************************************/
 
 int KisSynchronizedConnectionBase::eventType()
 {
     return s_instance->eventType;
 }
 
 void KisSynchronizedConnectionBase::registerSynchronizedEventBarrier(std::function<void ()> callback)
 {
     KIS_SAFE_ASSERT_RECOVER_NOOP(!s_barrier->callback);
     s_barrier->callback = callback;
 }
 
 bool KisSynchronizedConnectionBase::event(QEvent *event)
 {
     if (event->type() == s_instance->eventType) {
         KisSynchronizedConnectionEvent *typedEvent =
                 static_cast<KisSynchronizedConnectionEvent*>(event);
 
         KIS_SAFE_ASSERT_RECOVER_RETURN_VALUE(typedEvent->destination == this, false);
         deliverEventToReceiver();
         return true;
     }
 
     return QObject::event(event);
 }
 
 void KisSynchronizedConnectionBase::postEvent()
 {
     if (QThread::currentThread() == this->thread()) {
         /// TODO: This assert triggers in unittests that don't have a fully-featured
         /// KisApplication object. Perhaps we should add a fake callback to KISTEST_MAIN
         /// KIS_SAFE_ASSERT_RECOVER_NOOP(s_barrier->callback);
 
         if (s_barrier->callback) {
             s_barrier->callback();
         }
 
         deliverEventToReceiver();
     } else {
         qApp->postEvent(this, new KisSynchronizedConnectionEvent(this));
     }
 }