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/****************************************************************************
**
** Copyright (C) 1993-2009 NVIDIA Corporation.
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "Qt3DSDMPrefix.h"
#include "Qt3DSDMSignalSystem.h"
#include "EASTL/hash_map.h"
using namespace qt3dsdm;
namespace {
struct SSignalListener;
class ISignalSystemImpl
{
public:
virtual ~ISignalSystemImpl() {}
virtual void RemoveListener(SSignalListener &inListener) = 0;
};
struct SSignalSystemKey
{
void *m_Sender;
const char *m_SignalName;
SSignalSystemKey(void *inSender, const char *inSigName, IStringTable &inStrTable)
: m_Sender(inSender)
, m_SignalName(inStrTable.GetNarrowStr(inSigName))
{
}
SSignalSystemKey(const SSignalSystemKey &inOther)
: m_Sender(inOther.m_Sender)
, m_SignalName(inOther.m_SignalName)
{
}
SSignalSystemKey &operator=(const SSignalSystemKey &inOther)
{
if (this != &inOther) {
m_Sender = inOther.m_Sender;
m_SignalName = inOther.m_SignalName;
}
return *this;
}
bool operator==(const SSignalSystemKey &inOther) const
{
return m_Sender == inOther.m_Sender && m_SignalName == inOther.m_SignalName;
}
};
struct SSignalListener : ISignalConnection
{
shared_ptr<ISignalSystemImpl> m_SignalSystem;
TGenericSignalHandlerFunc m_Handler;
SSignalSystemKey m_Key;
SSignalListener(shared_ptr<ISignalSystemImpl> inSystem, TGenericSignalHandlerFunc inHandler,
SSignalSystemKey inKey)
: m_SignalSystem(inSystem)
, m_Handler(inHandler)
, m_Key(inKey)
{
}
~SSignalListener() { m_SignalSystem->RemoveListener(*this); }
void Signal(void *inSender, const char *inName, const char *inData, size_t inDataSize)
{
m_Handler(inSender, inName, inData, inDataSize);
}
};
typedef eastl::vector<SSignalListener *> TSignalListenerPtrList;
}
namespace eastl {
template <>
struct hash<SSignalSystemKey>
{
size_t operator()(const SSignalSystemKey &inKey) const
{
return hash<void *>()(inKey.m_Sender) ^ hash<const char *>()(inKey.m_SignalName);
}
};
}
namespace {
typedef eastl::hash_map<SSignalSystemKey, TSignalListenerPtrList> TSignalHandlerMap;
struct SSignalSystemImpl : public ISignalSystemImpl
{
TSignalHandlerMap m_SignalHandlers;
shared_ptr<IStringTable> m_StringTable;
SSignalSystemImpl(shared_ptr<IStringTable> inStrTable)
: m_StringTable(inStrTable)
{
}
TSignalListenerPtrList *FindListenerList(const SSignalSystemKey &inKey)
{
TSignalHandlerMap::iterator theIter = m_SignalHandlers.find(inKey);
if (theIter != m_SignalHandlers.end())
return &theIter->second;
return NULL;
}
void Signal(void *inSender, const char *inName, const char *inData, size_t inDataSize)
{
TSignalListenerPtrList *theSignals =
FindListenerList(SSignalSystemKey(inSender, inName, *m_StringTable));
if (theSignals) {
for (eastl_size_t idx = 0, end = theSignals->size(); idx < end; ++idx) {
(*theSignals)[idx]->Signal(inSender, inName, inData, inDataSize);
}
}
}
void RemoveListener(SSignalListener &inListener) override
{
TSignalListenerPtrList *theSignals = FindListenerList(inListener.m_Key);
if (theSignals) {
// If we could allow unordered access then this could potentially be a lot faster.
TSignalListenerPtrList::iterator theFind =
eastl::find(theSignals->begin(), theSignals->end(), &inListener);
if (theFind != theSignals->end())
theSignals->erase(theFind);
}
}
};
struct SSignalSystem : public ISignalSystem
{
shared_ptr<SSignalSystemImpl> m_System;
SSignalSystem(shared_ptr<IStringTable> inStrTable)
{
m_System = std::make_shared<SSignalSystemImpl>(inStrTable);
}
shared_ptr<ISignalConnection> AddListener(void *inSender, const char *inName,
TGenericSignalHandlerFunc inFunc) override
{
SSignalSystemKey theKey(inSender, inName, *m_System->m_StringTable);
TSignalHandlerMap::iterator theIter =
m_System->m_SignalHandlers.insert(eastl::make_pair(theKey, TSignalListenerPtrList()))
.first;
TSignalListenerPtrList &theList(theIter->second);
shared_ptr<SSignalListener> theSender =
std::make_shared<SSignalListener>(m_System, inFunc, theKey);
theList.push_back(theSender.get());
return theSender;
}
void Signal(void *inSender, const char *inName, const char *inData, size_t inDataSize) override
{
m_System->Signal(inSender, inName, inData, inDataSize);
}
};
}
shared_ptr<ISignalSystem> ISignalSystem::CreateSignalSystem(shared_ptr<IStringTable> inStrTable)
{
return std::make_shared<SSignalSystem>(inStrTable);
}
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