libgfaservices/shmqml/shmvar.cpp

#include "shmvar.h"
#include <QDebug>

CShmVariable::CShmVariable(void *pData, const std::type_info &rti, HSHM hShm, const char *pszName, int nIndex, QObject *pParent)
							: QObject(pParent), m_vt(VT_Invalid), m_data({NULL}), m_varName(pszName)
{
	if(!pData || !hShm)
	{
		Q_ASSERT_X(false, "CShmVariable::CShmVariable", "Invalid parameter!");
		return;
	}

    m_data.pVoid = pData;
    m_hShm = hShm;
    setObjectName(QStringLiteral("CShmVariable"));
    if((m_nIndex = nIndex) >= 0)
	{
		m_varName += QString("%1%2%3").arg('[').arg(nIndex).arg(']');
	}

    if(rti == typeid(bool))
    {
    	m_vt = VT_bool;
        m_cache.boolVal = *m_data.pBool;
#if _TRACK_TYPES_AT_LOAD
        qDebug() << "VT_bool";
#endif	//	_TRACK_TYPES_AT_LOAD    	
    }
    else if(rti == typeid(char))
    {
#ifdef __CHAR_UNSIGNED__
    	m_vt = VT_UI1;
        m_cache.UI1Val = *m_data.pUI1;
#if _TRACK_TYPES_AT_LOAD
        qDebug() << "VT_UI1";
#endif	//	_TRACK_TYPES_AT_LOAD    	
#else
        m_vt = VT_I1;
        m_cache.I1Val = *m_data.pI1;
#if _TRACK_TYPES_AT_LOAD
        qDebug() << "VT_I1";
#endif	//	_TRACK_TYPES_AT_LOAD    	
#endif
    }
    else if(rti == typeid(signed char))
    {
        m_vt = VT_I1;
        m_cache.I1Val = *m_data.pI1;
#if _TRACK_TYPES_AT_LOAD
        qDebug() << "VT_I1";
#endif	//	_TRACK_TYPES_AT_LOAD    	
    }
    else if(rti == typeid(unsigned char))
    {
    	m_vt = VT_UI1;
        m_cache.UI1Val = *m_data.pUI1;
#if _TRACK_TYPES_AT_LOAD
        qDebug() << "VT_UI1";
#endif	//	_TRACK_TYPES_AT_LOAD    	
    }
    else if(rti == typeid(short))
    {
    	m_vt = VT_I2;
        m_cache.I2Val = *m_data.pI2;
#if _TRACK_TYPES_AT_LOAD
        qDebug() << "VT_I2";
#endif	//	_TRACK_TYPES_AT_LOAD    	
    }
    else if(rti == typeid(unsigned short))
    {
    	m_vt = VT_UI2;
        m_cache.UI2Val = *m_data.pUI2;
#if _TRACK_TYPES_AT_LOAD
        qDebug() << "VT_UI2";
#endif	//	_TRACK_TYPES_AT_LOAD    	
    }
    else if(rti == typeid(int))
    {
    	m_vt = VT_I4;
        m_cache.I4Val = *m_data.pI4;
#if _TRACK_TYPES_AT_LOAD
        qDebug() << "VT_I4";
#endif	//	_TRACK_TYPES_AT_LOAD    	
    }
    else if(rti == typeid(unsigned int))
    {
    	m_vt = VT_UI4;
        m_cache.UI4Val = *m_data.pUI4;
#if _TRACK_TYPES_AT_LOAD
        qDebug() << "VT_UI4";
#endif	//	_TRACK_TYPES_AT_LOAD    	
    }
    else if(rti == typeid(long))
    {
    	if(sizeof(long) == sizeof(long long))
    	{
	    	m_vt = VT_I8;
            m_cache.I8Val = *m_data.pI8;
#if _TRACK_TYPES_AT_LOAD
            qDebug() << "VT_I8";
#endif	//	_TRACK_TYPES_AT_LOAD    	
	    }
    	else
    	{
	    	m_vt = VT_I4;
	        m_cache.I4Val = *m_data.pI4;
#if _TRACK_TYPES_AT_LOAD
            qDebug() << "VT_I4";
#endif	//	_TRACK_TYPES_AT_LOAD    	
	    }
    }
    else if(rti == typeid(unsigned long))
    {
    	if(sizeof(unsigned long) == sizeof(unsigned long long))
    	{
	    	m_vt = VT_UI8;
            m_cache.UI8Val = *m_data.pUI8;
#if _TRACK_TYPES_AT_LOAD
            qDebug() << "VT_UI8";
#endif	//	_TRACK_TYPES_AT_LOAD    	
	    }
    	else
    	{
	    	m_vt = VT_UI4;
	        m_cache.UI4Val = *m_data.pUI4;
#if _TRACK_TYPES_AT_LOAD
            qDebug() << "VT_UI4";
#endif	//	_TRACK_TYPES_AT_LOAD    	
	    }
    }
    else if(rti == typeid(long long))
    {
    	m_vt = VT_I8;
		m_cache.I8Val = *m_data.pI8;
#if _TRACK_TYPES_AT_LOAD
        qDebug() << "VT_I8";
#endif	//	_TRACK_TYPES_AT_LOAD    	
    }
    else if(rti == typeid(unsigned long long))
    {
    	m_vt = VT_UI8;
		m_cache.UI8Val = *m_data.pUI8;
#if _TRACK_TYPES_AT_LOAD
        qDebug() << "VT_UI8";
#endif	//	_TRACK_TYPES_AT_LOAD    	
    }
    else if(rti == typeid(float))
    {
    	m_vt = VT_float;
        m_cache.FloatVal = *m_data.pFloat;
#if _TRACK_TYPES_AT_LOAD
        qDebug() << "VT_float";
#endif	//	_TRACK_TYPES_AT_LOAD    	
    }
    else if(rti == typeid(double))
    {
    	m_vt = VT_double;
        m_cache.DoubleVal = *m_data.pDouble;
#if _TRACK_TYPES_AT_LOAD
        qDebug() << "VT_double";
#endif	//	_TRACK_TYPES_AT_LOAD    	
    }
    else
	{
		Q_ASSERT_X(false, "CShmVariable::CShmVariable", "Unknown data type!");
	}
}

CShmVariable::~CShmVariable(void)
{
}

void CShmVariable::valRaw(QVariant &v)
{
	switch(m_vt)
	{
	case VT_bool:
		v.setValue(*m_data.pBool);
		break;
	case VT_I1:
		v.setValue((signed int)*m_data.pI1);
		break;
	case VT_UI1:
		v.setValue((unsigned int)*m_data.pUI1);
		break;
	case VT_I2:
		v.setValue((signed int)*m_data.pI2);
		break;
	case VT_UI2:
		v.setValue((unsigned int)*m_data.pUI2);
		break;
	case VT_I4:
        v.setValue(*m_data.pI4);
		break;
	case VT_UI4:
        v.setValue(*m_data.pUI4);
		break;
	case VT_I8:
        v.setValue(*m_data.pI8);
		break;
	case VT_UI8:
        v.setValue(*m_data.pUI8);
		break;
	case VT_float:
		v.setValue(*m_data.pFloat);
		break;
	case VT_double:
		v.setValue(*m_data.pDouble);
		break;
    default:
        break;
	}
}

QVariant CShmVariable::val(void)
{
	QVariant v;
	Lock();
	valRaw(v);
	Unlock();
    return v;
}

void CShmVariable::setVal(const QVariant &val)
{
	if(val.isValid() && !val.isNull())
	{
#if _TRACK_QT_WRITES
		char szDebugOut[256];
#endif	//	_TRACK_QT_WRITES

		Lock();

		switch(m_vt)
		{
		case VT_bool:
			if(val.canConvert<bool>())
			{
				m_cache.boolVal = val.toBool();
				if(*m_data.pBool != m_cache.boolVal)
				{
					*m_data.pBool = m_cache.boolVal;
					emitChanged(false);
#if _TRACK_QT_WRITES
					sprintf(szDebugOut, "CShmVariable::setVal: bool %s@(%p) - %s", m_varName.toStdString().c_str(), m_data.pVoid, m_cache.boolVal ? "true" : "false");
        			qDebug() << szDebugOut;
#endif	//	_TRACK_QT_WRITES
				}
			}
			break;
		case VT_I1:
			if(val.canConvert<int>())
			{
				m_cache.I1Val = (signed char)val.toInt();
				if(*m_data.pI1 != m_cache.I1Val)
				{
					*m_data.pI1 = m_cache.I1Val;
					emitChanged(false);
#if _TRACK_QT_WRITES
					sprintf(szDebugOut, "CShmVariable::setVal: signed char %s@(%p) - %hhd", m_varName.toStdString().c_str(), m_data.pVoid, m_cache.I1Val);
        			qDebug() << szDebugOut;
#endif	//	_TRACK_QT_WRITES
				}
			}
			break;
		case VT_UI1:
			if(val.canConvert<int>())
			{
				m_cache.UI1Val = (unsigned char)val.toInt();
				if(*m_data.pUI1 != m_cache.UI1Val)
				{
					*m_data.pUI1 = m_cache.UI1Val;
					emitChanged(false);
#if _TRACK_QT_WRITES
					sprintf(szDebugOut, "CShmVariable::setVal: unsigned char %s@(%p) - %hhu", m_varName.toStdString().c_str(), m_data.pVoid, m_cache.UI1Val);
        			qDebug() << szDebugOut;
#endif	//	_TRACK_QT_WRITES
				}
			}
			break;
		case VT_I2:
			if(val.canConvert<int>())
			{
				m_cache.I2Val = (signed short)val.toInt();
				if(*m_data.pI2 != m_cache.I2Val)
				{
					*m_data.pI2 = m_cache.I2Val;
					emitChanged(false);
#if _TRACK_QT_WRITES
					sprintf(szDebugOut, "CShmVariable::setVal: signed short %s@(%p) - %hd", m_varName.toStdString().c_str(), m_data.pVoid, m_cache.I2Val);
        			qDebug() << szDebugOut;
#endif	//	_TRACK_QT_WRITES
				}
			}
			break;
		case VT_UI2:
			if(val.canConvert<int>())
			{
				m_cache.UI2Val = (unsigned short)val.toInt();
				if(*m_data.pUI2 != m_cache.UI2Val)
				{
					*m_data.pUI2 = m_cache.UI2Val;
					emitChanged(false);
#if _TRACK_QT_WRITES
					sprintf(szDebugOut, "CShmVariable::setVal: unsigned short %s@(%p) - %hu", m_varName.toStdString().c_str(), m_data.pVoid, m_cache.UI2Val);
        			qDebug() << szDebugOut;
#endif	//	_TRACK_QT_WRITES
				}
			}
			break;
		case VT_I4:
			if(val.canConvert<int>())
			{
				m_cache.I4Val = (signed int)val.toInt();
				if(*m_data.pI4 != m_cache.I4Val)
				{
					*m_data.pI4 = m_cache.I4Val;
					emitChanged(false);
#if _TRACK_QT_WRITES
					sprintf(szDebugOut, "CShmVariable::setVal: signed int %s@(%p) - %d", m_varName.toStdString().c_str(), m_data.pVoid, m_cache.I4Val);
        			qDebug() << szDebugOut;
#endif	//	_TRACK_QT_WRITES
				}
			}
			break;
		case VT_UI4:
			if(val.canConvert<int>())
			{
				m_cache.UI4Val = (unsigned int)val.toInt();
				if(*m_data.pUI4 != m_cache.UI4Val)
				{
					*m_data.pUI4 = m_cache.UI4Val;
					emitChanged(false);
#if _TRACK_QT_WRITES
					sprintf(szDebugOut, "CShmVariable::setVal: unsigned int %s@(%p) - %u", m_varName.toStdString().c_str(), m_data.pVoid, m_cache.UI4Val);
        			qDebug() << szDebugOut;
#endif	//	_TRACK_QT_WRITES
				}
			}
			break;
		case VT_I8:
			if(val.canConvert<long long>())
			{
				m_cache.I8Val = (signed long long)val.toLongLong();
				if(*m_data.pI8 != m_cache.I8Val)
				{
					*m_data.pI8 = m_cache.I8Val;
					emitChanged(false);
#if _TRACK_QT_WRITES
					sprintf(szDebugOut, "CShmVariable::setVal: signed long long %s@(%p) - %lld", m_varName.toStdString().c_str(), m_data.pVoid, m_cache.I8Val);
        			qDebug() << szDebugOut;
#endif	//	_TRACK_QT_WRITES
				}
			}
			break;
		case VT_UI8:
			if(val.canConvert<long long>())
			{
				m_cache.UI8Val = (unsigned long long)val.toLongLong();
				if(*m_data.pUI8 != m_cache.UI8Val)
				{
					*m_data.pUI8 = m_cache.UI8Val;
					emitChanged(false);
#if _TRACK_QT_WRITES
					sprintf(szDebugOut, "CShmVariable::setVal: unsigned long long %s@(%p) - %llu", m_varName.toStdString().c_str(), m_data.pVoid, m_cache.UI8Val);
        			qDebug() << szDebugOut;
#endif	//	_TRACK_QT_WRITES
				}
			}
			break;
		case VT_float:
			if(val.canConvert<float>())
			{
				m_cache.FloatVal = (float)val.toFloat();
				if(*m_data.pFloat != m_cache.FloatVal)
				{
					*m_data.pFloat = m_cache.FloatVal;
					emitChanged(false);
#if _TRACK_QT_WRITES
					sprintf(szDebugOut, "CShmVariable::setVal: float %s@(%p) - %f", m_varName.toStdString().c_str(), m_data.pVoid, m_cache.FloatVal);
        			qDebug() << szDebugOut;
#endif	//	_TRACK_QT_WRITES
				}
			}
			break;
		case VT_double:
			if(val.canConvert<double>())
			{
				m_cache.DoubleVal = (double)val.toDouble();
				if(*m_data.pDouble != m_cache.DoubleVal)
				{
					*m_data.pDouble = m_cache.DoubleVal;
					emitChanged(false);
#if _TRACK_QT_WRITES
					sprintf(szDebugOut, "CShmVariable::setVal: double %s@(%p) - %f", m_varName.toStdString().c_str(), m_data.pVoid, m_cache.DoubleVal);
        			qDebug() << szDebugOut;
#endif	//	_TRACK_QT_WRITES
				}
			}
			break;
		default:
	        qDebug() << "CShmVariable::setVal: invalid vartype!";
			break;
		}

		Unlock();
	}
}

unsigned int CShmVariable::vt(void) const
{
	return m_vt;
}

unsigned long long CShmVariable::CheckUpdateShm(bool fLock)
{
	CHECK_UPDATE_SHM_RETVAL rv = {1, 0};

	if(fLock)
		Lock();

	switch(m_vt)
	{
	case VT_bool:
		if(m_cache.boolVal != *m_data.pBool)
		{
			m_cache.boolVal = *m_data.pBool;
			emitChanged(false);
			rv.nUpdated = 1;
		}
		break;
	case VT_I1:
		if(m_cache.I1Val != *m_data.pI1)
		{
			m_cache.I1Val = *m_data.pI1;
			emitChanged(false);
			rv.nUpdated = 1;
		}
		break;
	case VT_UI1:
		if(m_cache.UI1Val != *m_data.pUI1)
		{
			m_cache.UI1Val = *m_data.pUI1;
			emitChanged(false);
			rv.nUpdated = 1;
		}
		break;
	case VT_I2:
		if(m_cache.I2Val != *m_data.pI2)
		{
			m_cache.I2Val = *m_data.pI2;
			emitChanged(false);
			rv.nUpdated = 1;
		}
		break;
	case VT_UI2:
		if(m_cache.UI2Val != *m_data.pUI2)
		{
			m_cache.UI2Val = *m_data.pUI2;
			emitChanged(false);
			rv.nUpdated = 1;
		}
		break;
	case VT_I4:
		if(m_cache.I4Val != *m_data.pI4)
		{
			m_cache.I4Val = *m_data.pI4;
			emitChanged(false);
			rv.nUpdated = 1;
		}
		break;
	case VT_UI4:
		if(m_cache.UI4Val != *m_data.pUI4)
		{
			m_cache.UI4Val = *m_data.pUI4;
			emitChanged(false);
			rv.nUpdated = 1;
		}
		break;
	case VT_I8:
		if(m_cache.I8Val != *m_data.pI8)
		{
			m_cache.I8Val = *m_data.pI8;
			emitChanged(false);
			rv.nUpdated = 1;
		}
		break;
	case VT_UI8:
		if(m_cache.UI8Val != *m_data.pUI8)
		{
			m_cache.UI8Val = *m_data.pUI8;
			emitChanged(false);
			rv.nUpdated = 1;
		}
		break;
	case VT_float:
		if(m_cache.FloatVal != *m_data.pFloat)
		{
			m_cache.FloatVal = *m_data.pFloat;
			emitChanged(false);
			rv.nUpdated = 1;
		}
		break;
	case VT_double:
		if(m_cache.DoubleVal != *m_data.pDouble)
		{
			m_cache.DoubleVal = *m_data.pDouble;
			emitChanged(false);
			rv.nUpdated = 1;
		}
		break;
    default:
        break;
	}

	if(fLock)
		Unlock();

	return rv.nRetval;
}

void CShmVariable::Lock(void)
{
	::GfaIpcLockSHM(m_hShm);
//	qDebug() << "CShmVariable::Lock";
}

void CShmVariable::Unlock(void)
{
//	qDebug() << "CShmVariable::Unlock";
	::GfaIpcUnlockSHM(m_hShm);
}

void CShmVariable::emitChanged(bool fLock)
{
//    qDebug() << "val changed!";
	if(fLock)
	    emit valChanged(val());
	else
	{
	    QVariant v;
	    valRaw(v);
	    emit valChanged(v);
	}
}