Solved

CSocket and CSocketFile

Posted on 2000-03-07
3
635 Views
Last Modified: 2013-11-20
I am trying to make  a simple client server application using CSocket and CSocketFile.
I have coded 2 thread functions, one listens for clients requests, while after moving beyond Accept()... first thread funtion "ServerStarter" is supposed to spin the other thread whoise function is "ClientHandler".
Code is as under
UINT ServerStarter(LPVOID pParam)
{CClientSocket*      clientsocket = new CClientSocket();
CListenSocket*      listensocket = new CListenSocket();
.
.
listensocket->Accept(*clientsocket);
CWinThread *def = AfxBeginThread(ClientHandler,clientsocket,THREAD_PRIORITY_BELOW_NORMAL,CREATE_SUSPENDED);
def->ResumeThread();
}
and "ClientHandler" is as under
UINT ClientHandler(LPVOID pParam)
{
((CClientSocket*)pParam)->init();

CString test = " hello server here";
*(((CClientSocket*)pParam)->in)<<test;
((CClientSocket*)pParam)->in->Flush();      
      return 0;
}

while init() is as under

void CClientSocket::init()
{

pSocketFile = new CSocketFile(this);
in = new CArchive(pSocketFile,CArchive::store);
out= new CArchive(pSocketFile,CArchive::load);

}

now programme give an "Assert_Valid" when it goes inside the init on the line
in = ........
to me, it seems that that socket is appearing an unvalid one to it. But if I dont start the thread "ClientHandler" and try to send to the data to client from first thread "ServerHandler" every things goes ok.
what could be the reason ?
0
Comment
Question by:daknight2000
  • 2
3 Comments
 

Author Comment

by:daknight2000
ID: 2593942
I have also tried making "clientsocket" as a global variable  but it didnt help.
0
 
LVL 9

Accepted Solution

by:
ShaunWilde earned 100 total points
ID: 2594627
You should only use CSockets etc in a CWinThread (UI thread) type thread as the CWinThread contains all the initialization required to manage CSockets.

so in your OnAccept of your listener socket you would (pseudo code)

CListenSocket::OnAccept(...)
{
CSocket tempSocket;

Accept(&tempSocket);

CSocketThread*pThread=(CSocketThread*)AfxBeginThread(RUNTIME_CLASS(CSocketThread),...,CREATE_SUSPENDED);

pThread->tempHandle=tempSocket.Detach();

pThread->ResumeThread();
}

then you would attach your socket to your thread in the initinstance
class CSocketThread:public CWinThread
{
SOCKET tempHandle;
CClientSocket m_socket; // derived from CSocket

}

CSocketThread::InitInstance()
{
m_socket.Attach(tempHandle);
m_socket.Init();
}

0
 

Author Comment

by:daknight2000
ID: 2607522
thanx..
sorry i was busy ...so i got late
0

Featured Post

Better Security Awareness With Threat Intelligence

See how one of the leading financial services organizations uses Recorded Future as part of a holistic threat intelligence program to promote security awareness and proactively and efficiently identify threats.

Join & Write a Comment

Introduction: Finishing the grid – keyboard support for arrow keys to manoeuvre, entering the numbers.  The PreTranslateMessage function is to be used to intercept and respond to keyboard events. Continuing from the fourth article about sudoku. …
Introduction: Database storage, where is the exe actually on the disc? Playing a game selected randomly (how to generate random numbers).  Error trapping with try..catch to help the code run even if something goes wrong. Continuing from the seve…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
When you create an app prototype with Adobe XD, you can insert system screens -- sharing or Control Center, for example -- with just a few clicks. This video shows you how. You can take the full course on Experts Exchange at http://bit.ly/XDcourse.

746 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now