File indexing completed on 2024-05-12 05:26:07

 /*
  * Copyright (C) 2014 Christian Mollekopf <chrigi_1@fastmail.fm>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) version 3, or any
  * later version accepted by the membership of KDE e.V. (or its
  * successor approved by the membership of KDE e.V.), which shall
  * act as a proxy defined in Section 6 of version 3 of the license.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include "threadboundary.h"
 #include <QThread>
 
 Q_DECLARE_METATYPE(std::function<void()>);
 
 namespace async {
 ThreadBoundary::ThreadBoundary() : QObject()
 {
     qRegisterMetaType<std::function<void()>>("std::function<void()>");
 }
 
 ThreadBoundary::~ThreadBoundary()
 {
 }
 
 void ThreadBoundary::callInMainThread(std::function<void()> f)
 {
     /*
      * This implementation causes lambdas to pile up if the target thread is the same as the caller thread, or the caller thread calls faster
      * than the target thread is able to execute the function calls. In that case any captures will equally pile up, resulting
      * in significant memory usage i.e. due to Emitter::addHandler calls that each capture a domain object.
      */
     if (QThread::currentThread() == this->thread()) {
         f();
     } else {
         QMetaObject::invokeMethod(this, "runInMainThread", Qt::QueuedConnection, QGenericReturnArgument(), Q_ARG(std::function<void()>, f));
     }
 }
 
 void ThreadBoundary::runInMainThread(std::function<void()> f)
 {
     f();
 }
 }