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GURUS! How to stop the threads which are using socket safely? Anthony Chen27-Jan-02 2:04 Anthony Chen 27-Jan-02 2:04  i want to close my app while some of the threads are using socket connection. how can i stop these threads and clean the memory used in the threads? i had tried to add the codes following in the DestoryWindow() of the MainFrame: while (m_MailThreadManager.GetThreadNum()>0) { CMailThread* pMailThread = m_MailThreadManager.RemoveHead(); pMailThread->PostThreadMessage(WM_MSG_ACTION_STOP_THREAD,0,0); if (WaitForSingleObject(pMailThread->m_hThread, INFINITE) == WAIT_OBJECT_0) { CloseHandle(pMailThread->m_hThread); } else { TerminateThread(pMailThread->m_hThread, -1); CloseHandle(pMailThread->m_hThread); } delete pMailThread; } but i found that the threads will cause windows exception after the SOCKET connection even if ExitThread had been execcuted. i don't know why since i had executed the ExitThread, the thread still exist and caused that SOCKET exception. and how can i terminat them safely? please help me! - Anthony Chen Re: GURUS! How to stop the threads which are using socket safely? Anthony Chen27-Jan-02 16:15 Anthony Chen 27-Jan-02 16:15  Why cannot anyone help me? - Anthony Chen Re: GURUS! How to stop the threads which are using socket safely? Ernest Laurentin27-Jan-02 16:25 Ernest Laurentin 27-Jan-02 16:25  You need to pass the Socket handle to the thread that you want to use to terminate the thread that is waiting on it. Use the "Thread Parameter" or other way. When you close the socket from a different thread, the thread that was waiting on "accept(...)" will return INVALID_SOCKET, so you will know that if fail. Hope this information helps - Greatest invention : "The Microchip!" Re: GURUS! How to stop the threads which are using socket safely? Le centriste29-Jan-02 4:13 Le centriste 29-Jan-02 4:13  If I understand well, you want a thread to tell a second thread to stop waiting on a socket, and you don't know how to do that because the second thread is blocking on the socket call? If this is your problem, make the second thread use select() [See MSDN for complete description] to see if the socket is ready. If i am right, and want more information, just tell me Michel Re: GURUS! How to stop the threads which are using socket safely? Anthony Chen29-Jan-02 14:31 Anthony Chen 29-Jan-02 14:31  Yeah, you are absolutely right! what you say is what i really mean. i have checked the MSDN about select(), which is used to determine the status of one or more sockets. now would you mind telling me: 1. what should i do to terminate a thread which has been blocked on a socket saftly. 2. what should i do to terminate a thread which has a socket (no blocking) saftly. thanks a lot. hoping more help. - Anthony Chen Change Dialog Border ?? Sonu Kapoor27-Jan-02 1:45 Sonu Kapoor 27-Jan-02 1:45  Hi Guys, Is it possible to change the Dialog Border Style ??? Best Regards Sonu Re: Change Dialog Border ?? Nish Nishant27-Jan-02 1:49 Nish Nishant 27-Jan-02 1:49  Use ModifyStyle/ModifyStyleEx Nish Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut Foxpro? Kuniva27-Jan-02 1:38 Kuniva 27-Jan-02 1:38  Uh hello, i have to program an application which uses an access database. I started in Visual C++ but suddenly i remembered Visual Studio also offered Foxpro. Allthough i have no idea what you can use Foxpro for exactly i know it has something to do with databases... Should i use Foxpro for my application instead? Kuniva -------------------------------------------- God gave man a penis and a brain but not enough blood to make both of 'em work at the same time. Re: Foxpro? Nish Nishant27-Jan-02 1:41 Nish Nishant 27-Jan-02 1:41  Stick with Access. I think they've abandoned Foxpro now Nish Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut Re: Foxpro? alex.barylski27-Jan-02 20:03 alex.barylski 27-Jan-02 20:03  I personally like Foxpro, but i'm not huge into DB programming but haven't heard much of Foxpro lately, so you should probably take the advice of Nish. God gave man a penis and a brain but not enough blood to make both of 'em work at the same time. You are who i got that quote from...god thats been bothering me for a while now. Finally an excuse for all of MAN kind... "An expert is someone who has made all the mistakes in thier field" - Niels Bohr Re: Foxpro? Michael P Butler28-Jan-02 1:14 Michael P Butler 28-Jan-02 1:14  FoxPro is very good for writing applications that interact with databases, that is it's primary function. The latest version 7, (just out recently) is pretty impressive with support for COM and Active X and XML. There is no .NET support yet but it is promised. Michael 'new' limit Erik Hammar26-Jan-02 23:56 Erik Hammar 26-Jan-02 23:56  Hi, all you happy coders I Hope somebody can help me with this problem I am having: In my program i try to allocate about 500KB (in smaller pieces) with the new operator, but it hangs in some function called '__sbh_alloc_block'... Is this because I can't get more memory from windows...? Thanks in advance, Erik Hammar Re: 'new' limit Nish Nishant27-Jan-02 0:06 Nish Nishant 27-Jan-02 0:06  Erik Hammar wrote: i try to allocate about 500KB (in smaller pieces) From that sentence I assume you have a loop of some kind where you repeatedly call new till you get 500 KB is several smaller blocks [or so we assume] Now are you sure your loop is looping the right number of times. perhaps it's a sort of endless loop! Nish Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut Re: 'new' limit Erik Hammar27-Jan-02 0:07 Erik Hammar 27-Jan-02 0:07  No it's not a loop... I create instances of about 5 classes, which each allocate one or two blocks of memory... Re: 'new' limit Nish Nishant27-Jan-02 0:24 Nish Nishant 27-Jan-02 0:24  After how many sucessful 'new's do you get the error? Nish Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut Re: 'new' limit Erik Hammar27-Jan-02 0:32 Erik Hammar 27-Jan-02 0:32  I get it after 5 times... ... byte *bmpdata = new byte[256*240]; memsize 1 > 128KB class1 = new CClass1(memsize1) (inside CClass1's constructor) data = new byte[memsize1] memsize 2 > 128KB class2 = new CClass2(memsize2) (inside CClass2's constructor) data = new byte[memsize2] class3 = new CClass3 - this is where it crashes (before the actual constructor of CClass3) ... Seems really strange to me, that this hangs the program, and not only gives me a NULL pointer! Re: 'new' limit Nish Nishant27-Jan-02 0:45 Nish Nishant 27-Jan-02 0:45  Well I cant even make any guesses from that. But try creating the CClass3 object first and then create CClass1 and CClass2. Now if it still gives an error when you create the CClass3 the problem must be with something you are doing in the CClass3 constructor, but if the trouble happens with the third new then we are again nowhere Try this out anyway. And if possible post the CClass1/2/3 constructor code as well. Also how is the data member-variable defined in these classes? Nish Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut Re: 'new' limit Erik Hammar27-Jan-02 1:03 Erik Hammar 27-Jan-02 1:03  Strange... moving the class3 creation code to the top, seems to eliminate the problem. That's strange, because the class3 doesn't even touch the class1 and class2 Anyway, Thanks for your concern! Re: 'new' limit Nish Nishant27-Jan-02 1:08 Nish Nishant 27-Jan-02 1:08  Erik, I think you should not be complacent about the error being removed. We still don't know why it crashed before. A bug that has been hidden but not removed can be very deadly. Good luck. Nish Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut Using CRecordset for more complex queries... 26-Jan-02 20:59 26-Jan-02 20:59  how can i make an instance of a CRecordSet class execute a more complex query (for example one with an inner select, as shown below) e.g. select name, street from Customers where name not in (select name from Uninteresting_Customers where ....) the m_strFilter attribute off the CRecordSet class doesn't accept the more complex queries, quite obviously because it was only intended to contain the where-clause of the query....any help would be greatly appreciated... bye Jonas Re: Using CRecordset for more complex queries... Mazdak26-Jan-02 21:36 Mazdak 26-Jan-02 21:36  I think for this case you should use ADO API functions: check these: http://lnrpc2.irb.hr/ebooks/0672313502/ch04/ch04.htm http://lnrpc2.irb.hr/ebooks/0672313502/ch06/ch06.htm Weird problem with a timer and a SDI RobJones26-Jan-02 19:56 RobJones 26-Jan-02 19:56  Howdy, I have a SDI CListView type app. I am using a WM_TIMER to try and update the list every second. The timer is working fine but the problem is that the list control doesn't update unless I click on one of the rows.. when I click on a row every row updates like it should, but when ever I want a update I have to click a row. Any ideas? Rob Re: Weird problem with a timer and a SDI alex.barylski26-Jan-02 21:53 alex.barylski 26-Jan-02 21:53  If you click and it updates itself i would assume you could get away with calling the CListView's SetFocus in your WM_TIMER. Although this might cause flicker and wouldn't allow you select any other object so this is only a short term fix. Perhaps a call to it's OnPaint or Invalidate() would be more appropriate. If someone explains precisely why, please let me know! TIA "An expert is someone who has made all the mistakes in thier field" - Niels Bohr Re: Weird problem with a timer and a SDI Nish Nishant26-Jan-02 22:53 Nish Nishant 26-Jan-02 22:53  Put an UpdateWindow after you update the list control. Though I am not sure you are doing the smart thing by calling a proc every 1 second using a timer. Nish Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut Re: Weird problem with a timer and a SDI RobJones27-Jan-02 5:56 RobJones 27-Jan-02 5:56  UpdateWindow() ,SetRedraw(TRUE), Update(), UpdateData(FLASE) RedrawWindow(), UpdateItems(int start, int end).. None of these work.. Nish [BusterBoy] wrote: Though I am not sure you are doing the smart thing by calling a proc every 1 second using a timer. My OnTimer just sends a WM_COPYDATA to another application in return that application sends my console updated data and I update the list control if there are any changes to be made.. So really, it only updates every now and then.. I know its not working because I can make a change in the other app and its not reflected in my Console until I click on a item in the list.. Dumb question, I can populate the list and do all the redrawing through my CListView class right? Im a little new with SDI and MDI apps.. Thanks, Rob

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