Calling same method from separate threads

[marcel]

Yes, but not a function scope mutex, but a class scope one.
The threads are accessing this method within the same instance of the class, right?

If they operate on two different instances, then there is no problem, unless you have static members/data that the function modifies.

Regards

[steg90]

Thanks Marcel,

I have put a QMutex in my class and have done the following :

PASSTHRU_MSG* QTCanMonitor::GetMessageDetail( unsigned long *pulNumMsgs, int iChannelIndex )
{
    QMutexLocker locker(&m_mutex);
 
	unsigned long ulTimeout = 0;
	int iReply = -1;
 
	if( m_pPassThruReadMsgs && m_bConnected )
	{
		iReply = (m_pPassThruReadMsgs)( m_lChannelID[iChannelIndex], m_CanMsg, pulNumMsgs, ulTimeout );
		if( iReply == -1 )
		{
			return NULL;
		}
	}
	else
		return NULL;
	return m_CanMsg;
}

PASSTHRU_MSG* QTCanMonitor::GetMessageDetail( unsigned long *pulNumMsgs, int iChannelIndex )
{
    QMutexLocker locker(&m_mutex);

	unsigned long ulTimeout = 0;
	int iReply = -1;

	if( m_pPassThruReadMsgs && m_bConnected )
	{
		iReply = (m_pPassThruReadMsgs)( m_lChannelID[iChannelIndex], m_CanMsg, pulNumMsgs, ulTimeout );
		if( iReply == -1 )
		{
			return NULL;
		}
	}
	else
		return NULL;
	return m_CanMsg;
}

To copy to clipboard, switch view to plain text mode 

Where m_mutex is the QMutex at class scope.

This works a treat. And yes, there is only one instance of the class the above method is in.

Regards,
Steve