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QuestionThread help!!! Pin
User 34160315-Jul-06 23:33
User 34160315-Jul-06 23:33 
Hi everybody!

I'm making a routing algo simulator using MFC and GDI+.
I have created three function that are the three steps the algo does: ElectCluster(); FindMember(); StartSteadyState();.

Now the StartSteadyState() creates a thread for each node of the network that has been elected Cluster head (p->ch).
<br />
void CSimDlg::StartSteadyState(void)<br />
[...].br />
	for (int i=0; i<m_vecNodes.size(); i++)<br />
	{<br />
		NODE* p = m_vecNodes[i];<br />
		<br />
		if(p->ch)<br />
		{<br />
			ThreadParam* pParam = new ThreadParam;<br />
			pParam->m_pDialog = this;<br />
			pParam->m_nNodeIndex = i;<br />
			_beginthread(StaticTx, 0, (void*)pParam);<br />
			counter++;<br />
		}<br />
	}<br />
[...].


and:
void CSimDlg::StaticTx(void * param)<br />
{<br />
	ThreadParam* pParam = (ThreadParam*)param;<br />
	pParam->m_pDialog->Tx(pParam->m_nNodeIndex);<br />
	delete pParam;<br />
}<br />
<br />
void CSimDlg::Tx(int nNodeIndex)<br />
{<br />
	[simulate transmission]<br />
	[graphic: draw nodes and color lines of the link used]<br />
}


Now my problem is that I would like to make different rounds:
<br />
void CSimDlg::OnBnClickedStart()<br />
{<br />
		for(int i=0; i < NumberOfRounds; i++)<br />
		{<br />
			ElectCluster();<br />
			FindMember();<br />
			StartSteadyState();<br />
		}<br />
}


This obviosly doesn't work because "for" doesn't wait for all the thread created by StartSteadyState();

I have tried to solve using:
<br />
hThread = (HANDLE)_beginthread(StaticTx, 0, (void*)pParam);<br />
WaitForSingleObject(hThread,INFINITE);<br />

It seems to work but doesn't shows the graphic. I have tried to put a MessageBox before WaitForSingleObject and for as long as I don't press the ok button I see that the links and nodes are coloring. pressing ok the graphic part stops.

What am I doing wrong?
Do you have any advices or suggestion?

modified 11-Mar-21 21:01pm.

AnswerRe: Thread help!!! Pin
DrSerge15-Jul-06 23:48
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User 34160316-Jul-06 0:17
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