Re: [UDT] about "UDT::select"

[Yunhong Gu <yu...@la...>]

in udt project properties, C/C++ -> Code Generation, select Runtime 
Library to "Multi-threaded Debug DLL (/MDd)"

Or, you can check out the most recent code from sourceforge CVS.

Thanks
Yunhong

On Fri, 7 Apr 2006, XU, Lizhen wrote:

> Hello!
>
> I've been using UDT on Windows-XP recently. I found it easy to use. But when
> I use the function "UDT::select" in my program(on MS visual
> studio.net2003),  I got a run-time error :
> *****************************************
> Debug Assertion Failed!
> Program: e:\try.cpp
> File: dbgheap.c
> Line: 1132
>
> Expression: _CrtIsValidHeapPointer(pUserData)
> ******************************************
>
> We cannot find where the problem is. Could you please kindly take the bother
> to have a look at this and help to find out the reason? Look forward to your
> help! Thanks a million.
>
> Best,
>
> Leslie
>
> The source code file is as follows:
>
> ////////////////////////////////////////////////////////////////////
> #include <iostream>
> #include <udt.h>
>
>
> using namespace std;
>
> using namespace UDT;
>
> int main()
> {
>
> UDTSOCKET serv2 = UDT::socket(AF_INET, SOCK_STREAM, 0);
> sockaddr_in my_addr2;
> my_addr2.sin_family = AF_INET;
> my_addr2.sin_port = htons(22222);
> my_addr2.sin_addr.s_addr = INADDR_ANY;
>
> cout<<"server open: "<<serv2<<endl;
> if (UDT::ERROR == UDT::bind(serv2, (sockaddr*)&my_addr2, sizeof(my_addr2)))
> {
>  cout << "bind: " << UDT::getlasterror().getErrorMessage();
>  return 0;
> }
> UDT::listen(serv2, 10);
>
> int namelen;
> sockaddr_in their_addr;
>
> UDTSOCKET recver = UDT::accept(serv2, (sockaddr*)&their_addr, &namelen);
> if(UDT::ERROR != recver)
>  cout<<"new client coming..."<< recver <<endl;
>
> timeval tv;
> UDSET tempfds;
>
> tv.tv_sec = 2;
> tv.tv_usec = 0;
>
> UD_ZERO(&tempfds);
> UD_SET(recver, &tempfds);
>
> if( UD_ISSET(recver, &tempfds))
>  cout<<"yes!"<<endl;
> bool done = false;
> int i = 0;
>
> Sleep(5000);
> while(!done)
> {
>  int res = UDT::select(0, &tempfds, NULL, NULL, &tv);
>
>  if(res == 0 && res != (UDT::ERROR))
>  {
>   cout<<++i<<": "<<"time out!"<<endl;
>   tv.tv_sec = 2;
>   tv.tv_usec = 0;
>   UD_ZERO(&tempfds);
>   UD_SET(recver, &tempfds);
>   continue;
>  }
>  else if( UD_ISSET(recver, &tempfds) )
>  {
>   cout<<"good!"<<endl;
>   done = true;
>  }
>  else
>  {
>   cout<<"what's up?"<<endl;
>   break;
>  }
>
> }
> UDT::close(serv2);
> return 0;
> }
>
> ///////////////////////////////////////////////////////////////////////
>