File indexing completed on 2024-05-05 17:50:04

 /*
    Copyright (C) 2018 Andreas Hartmetz <ahartmetz@gmail.com>
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.
 
    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
    Library General Public License for more details.
 
    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LGPL.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
 
    Alternatively, this file is available under the Mozilla Public License
    Version 1.1.  You may obtain a copy of the License at
    http://www.mozilla.org/MPL/
 */
 
 #include "iioeventforwarder.h"
 
 #include <cassert>
 
 // The logic of add/removeIoListenerInternal is based on knowledge that one Connection or Server can only
 // have one I/O listener, which is the one ITransport connecting to the bus or peer.
 void IIoEventForwarder::addIoListenerInternal(IIoEventListener *iol, uint32 ioRw)
 {
     assert(!ioEventSource()); // since our clients are internal, they are expected to be well-behaved
     assert(!m_downstream);
     setIoInterest(ioRw);
     m_downstream = iol;
     m_upstream->addIoListener(this);
     assert(ioEventSource());
     assert(m_upstream == ioEventSource());
 }
 
 void IIoEventForwarder::removeIoListenerInternal(IIoEventListener * /* iol */)
 {
     assert(ioEventSource());
     assert(m_upstream == ioEventSource());
     assert(m_downstream);
     m_upstream->removeIoListener(this);
     m_downstream = nullptr;
     // (no need to change I/O interest, only upstream can see it and we have no upstream now)
     assert(!ioEventSource());
 }
 
 void IIoEventForwarder::updateIoInterestInternal(IIoEventListener * /*iol*/, uint32 ioRw)
 {
     setIoInterest(ioRw);
 }
 
 FileDescriptor IIoEventForwarder::fileDescriptor() const
 {
     return m_downstream->fileDescriptor();
 }
 
 IIoEventListener *IIoEventForwarder::downstreamListener()
 {
     return m_downstream;
 }
 
 #if 0
 // Sample implementation for subclasses
 IO::Status IIoEventForwarderSubclass::handleIoReady(IO::RW rw)
 {
     IO::Status result = m_ioEventSink->handleIoReady(rw);
     if (result != IO::Status::OK) {
         // error handling - connection teardown and notifying some other listeners, for example
     }
 }
 #endif