multithreaded application using MFC

[ashraf_diaa]

Hi,

I am working in a visual c++ voice chat application (dialog based application). I am using the CAsychsocket Class for the TCP/IP connection. i have a full duplex sound card but i cann't send and receive at the same time. If i send from one PC to anther i received the voice well but the application is hanging so that i can just send in one direction. I need a simple code example to till me how to make the sending and receiving in different threads. I read a lot of articles in that issue but i cann't understand. Could you please help me.

Thank you very much.

[Naumaan]

According to your problem you need 2 threads for your socket communication.
One thead to process your incomming data and second to send .
Create a class derived from CWinThread and make 2 functions in it 1: Send Data 2: ReceiveData.

When u create a connected socket or accepted socket then create 2 objects of this thread class and set their pointer in socket class .

When u Receive any data then post a message to one of your thread class to receive and process data (ReceiveData function).

ReceiverThread->PostThreadMessage(RECV_MSG,(WPARAM)this,0);

and when u want to send data then post messag to other thread class object to send data ( SendData function).

SenderThread->PostThreadMessage(SEND_MSG,(WPARAM)this,(LPARAM)Msg);

hope this will help u

[ashraf_diaa]

Hello,

Thank you very much for your help. that was realy great.
I create a class derived from CWinThread called it CMyData then i make two member functions of that class (SendData() and ReceiveData()) the two functions are void and public. Then i create two member variables of the CMyData class called them m_pRecord, and m_pPlay . I already have a class derived from CAsyncSocket which is CMySocket. Is that OK!!!
I just need to know how can i "create 2 objects of this thread class and set their pointer in socket class".

best regards,

asharf

[Naumaan]

Make 2 variables of your CMyData class in your CMySocket lets suppose.

CMyData m_pSDataThread; //pointer of send data thread
CMyData m_pRDataThread; //pointer of receive data thread

when u create socket then create both threads

m_pSDataThread=(CMyData *)AfxBeginThread(RUNTIME_CLASS(CMyData));
m_pRDataThread=(CMyData *)AfxBeginThread(RUNTIME_CLASS(CMyData));

now your have 2 threads one for receiving data and one for sending data.
at this point you should have your socket class pointer in both of threads for accessing socket .

make a variable in your CMyData class
CASyncSocket *m_pMySocket;
and after creating your threads assign your socket class pointer in m_pMySocket pointer.

// assigning socket class pointer in thread class
m_pSDataThread->m_pMySocket=this;
m_pRDataThread->m_pMySocket=this;

hope this will help u

[ashraf_diaa]

Hello sir,

Thank you very much for your help. I am now have three classes which are CSockDlg, CMySocket, CMyData. I am sorry but i realy confused. I don't know how to connect these three sockets correctly. I always have problems with pointers.
Could you please advice me what is the easiest way to make these three classes working correctly. when they are just two i can make them connected correctly but now when they are three the situation get more complex. (if you don't mind and have time to help me i can send you the source code of my program, it is already working but just sending from on side to another)

Thank you very much.

Best Regards,

Ashraf

[Naumaan]

post me ur code

[ashraf_diaa]

Hello sir,

Thank you for your help. I post the source code for you in your E-Mail ([email protected] ) because it is too big to send here. Please help me as soon as you can.

best regards,

ashraf