bitfield optimizations

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  - 1
    - Using excel automation with a namespace I am doing Excel automation. If I include the .h file for Excel in a .h file as below I get error messages like: error C2011: '_Application' : 'class" type redefinition. _Application is an Excel class defined in excel9.h. #include "..\eserver\excel9.h" // needed for excel Thinking that this name conflicted with another name I wrapped the excel.h with a namespace as below to avoid the conflicts. namespace excel { #include "..\eserver\excel9.h" // needed for excel } This produces errors like: error LNK2019: unresolved external symbol "public: struct IDispatch * __thiscall excel::_Application::GetWorkbooks (void)" (?GetWorksbooks@_Application@excel@@QAEPAUIDispatch@@XZ) referenced in function "public: bool __thiscall CPrintOrder::custom_order_form_create_pages_excel(void)"(?custom_order_form_ create_pages_excel@CPrintOrder@@QAE_NXZ) If I put the excel.h include in a .cpp file it compiles and links fine. I prefer it to be in the .h file because I want to share a structure that contains Excel objects in it. What is causing the problems with the type redefinitions? If I use the namespace excel why is the linker objecting to that and how do I get around it? =================================================== Zachary Hilbun Software Consultant http://www.vianova.com Via Nova OpenGL, Open Inventor 3D products, Windows 95/NT Dallas, Texas VC++, C#, embedded systems, VxD's 1977 SSII SRX31185 G30 Tag: bitfield optimizations Tag: 232827
  - 2
    - Socket question.... Hi, I came across this wierd situation recently: One of our cutomers, has dual NIC cards on all of their machines. The NIC cards are "Teamed" to provide extra bandwidth and fault tolarence. These are Broadcom NetXtreme Gigabit Ethernet cards running on driver v2.78. When our software is run on these machines, the machine stops responding after some time (approx 13-14 mins). The machine cannot be pinged as well. If our software is run on the same machine without the "Teaming", i.e. only one nic card is used, it runs fine. The OS was windows 2000 server in both the cases. Our software makes use of SOAP and windows socket to comminucate with other servers. Is this a know pattern? Does any body have any idea how to resolve this issue? Thanks in advance. Regards, Soumitra. Tag: bitfield optimizations Tag: 232826
  - 3
    - CreateProcessAsUser (error 1314) I have a problem with CreateProcessAsUser. It always returns me the error code 1314 ("A required privilege is not held by the client"). My application needs to change the privileges to administrator privileges of the current process. So I use ImpersonateLoggedOnUser (this part goes well). Besides, it has to launch several commands, so I have to use CreateProcessAsUser (because I saw that ShellExecute or WinExec don't inherit privileges). To create the new process I duplicate the token that use to Impersonate converting it to primary token. Furthermore, I put the SE_ASSIGNPRIMARYTOKEN_NAME and SE_INCREASE_QUOTA_NAME on token, because I read that it needs, but nothing happens. The error is still here. Does anyone can help me? What it's happening? How can I resolve it? Here it's the code that I use: if (!RevertToSelf()) return false; // Get the current process token handle... if( !OpenProcessToken( GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken )) return false; if (!SetPrivilege(hToken, SE_TCB_NAME, true)) return false; if (LogonUser(szUsername, szDomain, szPassword, LOGON32_LOGON_INTERACTIVE, LOGON32_PROVIDER_DEFAULT, &hAdminUser)) bUserAuth = true; else bUserAuth = false; if (bUserAuth) { if (!ImpersonateLoggedOnUser(hAdminUser)) MessageBox(NULL, TEXT("Inpersonate Error"), TEXT(""), MB_OK); ///////////////////////////////////////////////// if (DuplicateTokenEx(hAdminUser, MAXIMUM_ALLOWED, 0, SecurityImpersonation, TokenPrimary, &hAdminPriv) == 0) MessageBox(NULL, TEXT("duplicate token Error"), TEXT(""), MB_OK); if (!SetPrivilege(hAdminPriv, SE_ASSIGNPRIMARYTOKEN_NAME, true)) { MessageBox(NULL, TEXT("SetPrivilege Error"), TEXT(""), MB_OK); return false; } if (!SetPrivilege(hAdminPriv, SE_INCREASE_QUOTA_NAME, true)) { MessageBox(NULL, TEXT("SetPrivilege Error"), TEXT(""), MB_OK); return false; } TCHAR szRes[MAXSTRINGLEN]; STARTUPINFO si; PROCESS_INFORMATION pi; ZeroMemory( &si, sizeof(si) ); si.cb = sizeof(si); ZeroMemory( &pi, sizeof(pi) ); my_strcpy(szRes, TEXT("C:\\Archivos de programa\\Inquiero Installable ISD\\prova.exe")); if (!CreateProcessAsUser(hAdminPriv, NULL, szRes, NULL, NULL, TRUE, DETACHED_PROCESS|IDLE_PRIORITY_CLASS, NULL, NULL, &si, &pi)) { TCHAR szError[MAXSTRINGLEN]; wsprintf(szError, TEXT("%d"), GetLastError()); MessageBox(NULL, szError, TEXT(""), MB_OK); } } Tag: bitfield optimizations Tag: 232817
  - 4
    - Template code works with g++ but not MSVC++ The following code: class ABC { std::list<ABC> mylist; }; compiles in g++ without a problem. However, VC++ version 6 (latest service pack), complains about the class ABC not being defined on the line where the list is declared. I tried adding a class ABC; statement before the class definition, but it had no effect. I understand this problem is due to the fact that the template parameter of mylist is in fact the class of which mylist is a member. Is this a problem in microsoft's implementation, or is this normal behaviour and the fact g++ accepts it is an extension? Are there any simple workarounds? I need to get this code to work with both compilers. Thanks Pierre Tag: bitfield optimizations Tag: 232812
  - 5
    - Add a control to a single cell of DataGrid Hi all, is it possible to add a control of my choise (e.g., ComboBox or Button) to a single cell of a Forms::DataGrid? I understand how to add a control for a whole column. But I want to add, say, a button in cell (3,4), without having buttons in all of column 4. Thanks, Matt. Tag: bitfield optimizations Tag: 232794
  - 6
    - Link error when using standard functions in VS.NET Assembly in a window or console app in VS.NET2003, I have no problem to use unsigned char *data; data=(unsigned char *)malloc(2000); But in an Assembly, when compiling it, I got error LNK2001:unresolved symbol "void* __cdeclmalloc(unsigned int)" (?malloc@@J0YAPAXI@Z) fatal error LNK1120: 1 unresolved externals when using File _open(...) or _read(...), I got similar problem. Can you tell why and how to fix? Thanks Keith Tag: bitfield optimizations Tag: 232782
  - 7
    - RAS Client I desperatly need to make some client software for my ISP. I have tried using RAS from VB.NET and C# with no luck, and so I have to turn to C++. As some have seen, I'm not the greatest with C++ yet, so I was wondering if anyone had a good example of makeing a C++ wrapper for RAS that I can export the function to call from VB/VB.NET or C#. Thank You, Tibby Tag: bitfield optimizations Tag: 232781
  - 8
    - get a window handle from an Instance handle Hi, I got some difficulties in getting a window handle from an instance handle in Win32 API/C. I used the approach stated in the knowledge base article 242308 -- how to find a window handle from an instance handle, but I found nothing even though I went through the whole window (TOP level windows) handles. I found the instance handle is a 9-digit long integer, and the other process IDs returned by GetWindowThreadProcessId are only three or four digits long. Is it normal? I appreciate your any ideas! Hu Tag: bitfield optimizations Tag: 232778
  - 9
    - Handle to a Process's Window Does anyone know how to get the window handle to a processes main window? I create a process using CreateProcess and I would like to destroy it by sending a WM_QUIT message to the main window. Thanks. Tag: bitfield optimizations Tag: 232774
  - 10
    - Embed an exe inside an ActiveX control ? Hi: Anyone knows how to embed an exe file inside an ActiveX control ? I would like the activex control to be downloaded and execute the exe file on the user machine. Thanks in Advance Polaris Tag: bitfield optimizations Tag: 232772
  - 11
    - Template template argument I am sorry if this has been asked before, I couldn't find it right away, that's why I'm posting here. This code: --------------------- template <typename NumType, template <typename T> class DerivedType> class Matrix { public: NumType operator()( const int row, const int col ) const; NumType& operator()( const int row, const int col ); }; template <typename NumType> class GeneralMatrix : public Matrix<NumType, GeneralMatrix> { public: GeneralMatrix(int,int) {} }; int main() { GeneralMatrix<double> matrix(3,3); matrix(1,1) = 2.0; } ---------------------- VC++ 7.1 refuses to compile complaining about the use of 'GeneralMatrix' as the second argument to 'Matrix' in the template definition. Is that a [known] bug or am I missing something? The situation came up while I was answering a question about operator(), not about template template arguments, but still... Thanks. Victor Tag: bitfield optimizations Tag: 232746
  - 12
    - Get Accont type. Hi all, I need know if the current user loged have a administrator privilegies? How I get this. Get account of currente user. Thanks Tag: bitfield optimizations Tag: 232741
  - 13
    - .def file and C++ Hi, I have a question about the "C++" symbol export. Is it possible to export some "C++" symbols (classes) using .def file (instead of __declspec(dllexport)) ? Thanks George Tag: bitfield optimizations Tag: 232734
  - 14
    - Format and quick format Hi, What's the windows API to perform formatting or quick formatting of a floppy, a partition, or a volume? Please advice, thanks! -CL Tag: bitfield optimizations Tag: 232733
  - 15
    - user defined data type in com dll Hello I am writing a com dll, i am trying to use a structure variable in on of the interface but it gives me error on compilation. I just wanted to know whether i can use user defined data types in interface of com dll. [id(5), helpstring("method GetData")] HRESULT GetData([in] WAYPOINTS &wp); I get the following error expecting a type specification near "WAYPOINTS" Tag: bitfield optimizations Tag: 232730
  - 16
    - Perl syntax coloring in Visual Studio 6.0 Hi, Does anyone have the usertype.dat file for the perl syntax ? Does anyone knows a different way to highlight the perl syntax in visual studio 6.0 ? Tag: bitfield optimizations Tag: 232728
  - 17
    - Dialogbox did not show up. Please help!!! Hi, I am implementing a Win32 DLL project. In this dll I developed a dialogbox. In order to export the dialogbox, I did the following things. 1. define a function called Test() int Test() { return DialogBox(NULL, MAKEINTRESOURCE(IDD_DIALOG),NULL, DlgProc); } 2. export this Test() function. The problem I encountered was the dialogbox did not show up. The DialogBox() returned a -1 indicating it failed to create the dialogbox. So I called GetLastError() and got the error code 1812, which indicates "The specified image file did not contain a resource section.". I am pretty sure the Test() function was successfully exported because I got some results if I replace the DialogBox() with other functions. I stuck there for tens of hours so if you have any clues or ideas, please drop me a line. I deeply appreciate your help. THanks, Hu Tag: bitfield optimizations Tag: 232717
  - 18
    - VC++ standard compliance Is it legal to compile the attatched code? More specificlly, are the calls to f() properly resolved? Please explain why in either case. begin 666 main.zip M4$L#!!0``@`(`'(-ZS!4`K)IL@```%H"```(````;6%I;BYC<'"]D,T.@C 0 MA,]MTG?8(Q CGLM)PEF?H:W\-(%B^J,'P[N[!4),O(J;7F:FFW[3//_I,,JH MZH5S4#+Z8O0>9*\59Y0\1GV#)H$4U&B<!]_9\8D2([Q')D:G(F[G>P%5P&'! M^6+#$YPV+92<-\5B;+Q_`-3&PR"T833!EU 10BYAD+6]-F?;AJ$VWATP4IVP M64;(9LZLZ5R'5" BNSA&ZK5%M?ZVC%I^)K;VP1HXH9QVJ?4&4$L!`A0`% `" M``@`<@WK,%0"LFFR````6@(```@``````````0`@( ```````&UA:6XN8W!P 64$L%!@`````!``$`-@```-@````````` ` end Tag: bitfield optimizations Tag: 232715
  - 19
    - Static libs Hello all ! I want to create a static lib. In it, i'm calling a function (lets say 'xzy') that is in another static lib... So I included it in the project and I compiled... it compiled fine.. When I write a client that uses my lib, it complains that it cannot link the 'xyz' function (unresolved)... So the client have to include the lib where 'xzy' is implemented... Is there a way for the function body 'xyz' be included in my static lib so that clients that will use my lib won't have to include all other libs that my lib uses !? Mike Tag: bitfield optimizations Tag: 232709
  - 20
    - Slow file transfer ... Hi, I am writting a program using WinSock2 to transfer files, the program seems work fine when the file is not that big. But when I tried it with a 370M file, it's too slow that I can tell the transferrred file increase it's size about 1200byte each time. I used TransmitFile() in putting file, here is how I use the function: if(!TransmitFile( m_socket, hFile, 0, 0, NULL, NULL, 0 )) { CloseHandle(hFile); throw CCException( CWsaerr(), WSAGetLastError(), _T("Falied to transmit file") ); } I am not sure if the slow transfer is from this function call. Even I increase the buffer size of receiving side (I used recv() ), it seems no effect. So I suspect it. One of my collegues said MTS may limit the transfer to about that speed, but I am not sure. Any idea? If TransmitFile() does cause this slowing down, any ways to fix it? Or I have to go back to use traditional send() to send? Any comments or suggestions? Thanks, Peter Tag: bitfield optimizations Tag: 232699
  - 21
    - Passing structs across a dll to vb projects Hi again, How i can pass one structs to vb projects?? Thanks. Tag: bitfield optimizations Tag: 232689
  - 22
    - richedit(?1) + windows 98 + em_replacesel = codepage problem I have richedit (control) with some russian text in it. Then I make a selection - SendMessage(Handle, EM_EXSETSEL, 0, ...)); And then I replace a selection - SendMessage(Handle, EM_REPLACESEL, 0, buffer) with some russian text. The result is OK on windows2000 and NT, but on windows 98(russian edition) inserted text is in wrong codepage (appeared as unreadable abracadabra). so help me please. -- --- With best wishes, Kirill. * ...chasing dreams... Tag: bitfield optimizations Tag: 232684
  - 23
    - deadlock on SMP machines - perhaps caused by wldap32.dll? Hello, Apologies in advance, this is a very long post, but I'm trying to be as complete as possible. I'm also not sure if this is the correct group, but it seemed appropriate. We have a process that runs as part of our product that has been working fine on Windows. However, we recently had an issue onsite where these processes (there are usually multiple instances) would hang and become completely unresponsive on SMP (Compaq 8-way) machines running Windows NT and 2000. I've managed to recreate the issue in our test lab on a dual Xeon (hyperthreaded) box running Windows 2003. There is definitely some sort of deadlock situation here, but I'm at a loss how to proceed after banging my head against this for a week now. There is some evidence that suggests the DllInit function of wldap32 is somehow a player in this - the details are further down. First, let me provide a little context: This service (it's not really an application) is written in VC++ 6.0, and is spawned via a daemon that is also part of our application. In a typical deployment there is one of these service processes for each processor on the local machine. The service instantiates a Java Virtual Machine via JNI, and most of our core code executes within the VM. One of the functions of this service is to spawn processes and feed them input and capture their output. This is acheived by the VM loading a VC++ 6.0 bridge library, which in turn loads another VC++ 6.0 library (we'll call this the "work library") which does the actual work. When all of the assigned work is through, the work library is unloaded until the next time. The work library is fairly simple, and the core behavior involves invoking CreateProcess (usually cmd.exe, which in my test setup just echoes some msg), and creating threads to write to the input handle, and read from the output and error handles. This has been working on all flavors of Windows (uniprocessor) for quite some time. Now, to the details. Here is the basic sequence leading up to the hang: 1) Process loads the work library 2) Process performs some number of brief "work units" (CreateProcess() + accompanying threads, and then cleanup) happily and healthily 3) Process CPU utilization drops to 0, and there is no more activity, ever. This lockup appears to happen faster when more instances are running. Attaching cdb to these hung processes consistently reveals two scenarios: Scenario A - the "Is wldap32.dll doing something bad?" scenario ---------- The work library thread which called CreateProcess has successfully waited on the process to exit. It waits on an Event that will be set by the thread which reads the output from the process, but that Event is never set. Mainly because those helper threads are stuck. The debugger always has to forcibly break into the process b/c the loader lock is held. !locks reveals two locks in contention: CritSec ntdll!LdrpLoaderLock+0 at 77FC2340 LockCount 8 RecursionCount 1 OwningThread b80 EntryCount 2a ContentionCount 2a *** Locked CritSec WLDAP32!PerThreadListLock+0 at 76F34010 LockCount 1 RecursionCount 1 OwningThread d64 EntryCount 1 ContentionCount 1 *** Locked ---- Stack trace for thread b80: 0f5dfba8 77f43741 77f5d64e 000005a0 00000000 SharedUserData!SystemCallStub+0x4 0f5dfbac 77f5d64e 000005a0 00000000 00000000 ntdll!ZwWaitForSingleObject+0xc 0f5dfbe8 77f42044 000005a0 76f1129f 76f34010 ntdll!RtlpWaitForCriticalSection+0x126 0f5dfbf0 76f1129f 76f34010 00000000 0f5dfc1c ntdll!RtlEnterCriticalSection+0x46 0f5dfc00 76f11257 00000b80 77f47dc9 76f10000 WLDAP32!AddPerThreadEntry+0x2f 0f5dfc08 77f47dc9 76f10000 00000002 00000000 WLDAP32!LdapDllInit+0x3e 0f5dfc28 77f5d067 76f11180 76f10000 00000002 ntdll!LdrpCallInitRoutine+0x14 0f5dfcbc 77f5cef6 0f5dfd30 0f5dfd30 00000000 ntdll!LdrpInitializeThread+0xd4 0f5dfd1c 77f45241 0f5dfd30 77f40000 00000000 ntdll!LdrpInitialize+0x171 00000000 00000000 00000000 00000000 00000000 ntdll!KiUserApcDispatcher+0x7 To me, this begs the question: why is this library referred to in the first place? We certainly don't use LDAP and we aren't using ActiveDirectory, either. 'lm' reveals that it is an unloaded module. My only guess is that the library init routine is called in order to see if LDAP is enabled in case it's needed to check process/thread creation security tokens. The interesting thing about WLDAP32!PerThreadListLock+0 is that the owning thread (d64) is nowhere to be found! So, no stack trace. There are several other threads waiting on locks. None of them are in my input/output/error read/write user code, they are all in LdrpInitialize or kernel32!ExitThread. I suspect the exiting threads are mine. 5 threads have the same trace (with differing addresses, but waiting on the same critical section - 77fc2340): 0f6dfbec 77f43741 77f5d64e 00000330 00000000 SharedUserData!SystemCallStub+0x4 0f6dfbf0 77f5d64e 00000330 00000000 00000000 ntdll!ZwWaitForSingleObject+0xc 0f6dfc2c 77f42044 00000330 77f5cfcc 77fc2340 ntdll!RtlpWaitForCriticalSection+0x126 0f6dfc34 77f5cfcc 77fc2340 00000000 7ffdf000 ntdll!RtlEnterCriticalSection+0x46 0f6dfcbc 77f5cef6 0f6dfd30 0f6dfd30 00000000 ntdll!LdrpInitializeThread+0x2f 0f6dfd1c 77f45241 0f6dfd30 77f40000 00000000 ntdll!LdrpInitialize+0x171 00000000 00000000 00000000 00000000 00000000 ntdll!KiUserApcDispatcher+0x7 And here are the exiting threads: c18: ---- 0e0dfe70 77f43741 77f5d64e 00000330 00000000 SharedUserData!SystemCallStub+0x4 0e0dfe74 77f5d64e 00000330 00000000 00000000 ntdll!ZwWaitForSingleObject+0xc 0e0dfeb0 77f42044 00000330 77f7c658 77fc2340 ntdll!RtlpWaitForCriticalSection+0x126 0e0dfeb8 77f7c658 77fc2340 00000000 7ffa4000 ntdll!RtlEnterCriticalSection+0x46 0e0dff44 77e57eb3 00000000 0c0bd418 00a87b88 ntdll!LdrShutdownThread+0x30 0e0dff7c 77bc917d 00000000 77bc91f3 00000000 kernel32!ExitThread+0x41 0e0dff84 77bc91f3 00000000 00000000 00000000 msvcrt!_endthreadex+0x25 0e0dffb8 77e4a990 00a87b88 00000000 00000000 msvcrt!_endthreadex+0x9b 0e0dffec 00000000 77bc917e 00a87b88 00000000 kernel32!BaseThreadStart+0x34 9cc: ---- 0e1dfe70 77f43741 77f5d64e 00000330 00000000 SharedUserData!SystemCallStub+0x4 0e1dfe74 77f5d64e 00000330 00000000 00000000 ntdll!ZwWaitForSingleObject+0xc 0e1dfeb0 77f42044 00000330 77f7c658 77fc2340 ntdll!RtlpWaitForCriticalSection+0x126 0e1dfeb8 77f7c658 77fc2340 00000000 7ffa3000 ntdll!RtlEnterCriticalSection+0x46 0e1dff44 77e57eb3 00000000 0b2e6c48 0b38b590 ntdll!LdrShutdownThread+0x30 0e1dff7c 77bc917d 00000000 77bc91f3 00000000 kernel32!ExitThread+0x41 0e1dff84 77bc91f3 00000000 00000000 00000000 msvcrt!_endthreadex+0x25 0e1dffb8 77e4a990 0b38b590 00000000 00000000 msvcrt!_endthreadex+0x9b 0e1dffec 00000000 77bc917e 0b38b590 00000000 kernel32!BaseThreadStart+0x34 I can provide further information if it is needed. ------------------------------------------------------------------------------- Scenario B - the "what happened to the malloc lock?" scenario ---------- As in scenario A, the work library thread which called CreateProcess has successfully waited on the process to exit. It waits on an Event that will be set by the thread which reads the output from the process, but that Event is never set. These helper threads are also stuck, but this time they are actually in user code. The debugger does not have to forcibly break into this process. !locks only reveals one lock in contention: CritSec MSVCRTD!__app_type+34 at 10264780 LockCount 1 RecursionCount 0 OwningThread 0 EntryCount 4 ContentionCount 4 *** Locked The owning thread is 0. Uh oh. My two helper threads also happen to be waiting on this lock: ea8: ---- 0f2eed90 77f43741 77f5d64e 00000680 00000000 SharedUserData!SystemCallStub+0x4 0f2eed94 77f5d64e 00000680 00000000 00000000 ntdll!ZwWaitForSingleObject+0xc 0f2eedd0 77f42044 00000680 1020b5a3 10264780 ntdll!RtlpWaitForCriticalSection+0x126 0f2eedd8 1020b5a3 10264780 0f2eeec4 0f2eee18 ntdll!RtlEnterCriticalSection+0x46 0f2eede8 1021352a 00000009 0f2efed8 0f2eee74 MSVCRTD!_lock+0x93 0f2eee18 102134ce 0de09de0 00000001 0f2eee34 MSVCRTD!_free_dbg+0x2a 0f2eee28 104bd0ed 0de09de0 0f2eee44 104ad0f0 MSVCRTD!free+0xe 0f2eee34 104ad0f0 0de09de0 0f2eeec4 0f2eee5c MSVCP60D!operator delete+0xd 0f2eee44 1048be9e 0de09de0 00000021 ffffffff MSVCP60D!std::allocator<char>::deallocate+0x10 0f2eee5c 10489b71 00000001 0f2eeec4 0f2efee4 MSVCP60D!std::basic_string<char,std::char_traits<char>,std::allocator<char> >::_Tidy+0x6e 0f2eee6c 0c0e3c99 0f2eff74 0f2efeec 0de09ce0 MSVCP60D!std::basic_string<char,std::char_traits<char>,std::allocator<char> >::~basic_string<char,std::char_traits<char>,std::allocator<char> >+0x11 0f2efee4 0c0d9ddb 00000000 00000000 0de09ce0 worklib!NullCopyRunner::run+0x119 0f2eff84 1020bf53 0de09c98 00000000 00000000 worklib!JobThread::execute+0x4b 0f2effb8 77e4a990 0de09ce0 00000000 00000000 MSVCRTD!_beginthreadex+0x133 0f2effec 00000000 1020bee0 0de09ce0 00000000 kernel32!BaseThreadStart+0x34 7d0: ---- 0f1ee64c 77f43741 77f5d64e 00000680 00000000 SharedUserData!SystemCallStub+0x4 0f1ee650 77f5d64e 00000680 00000000 00000000 ntdll!ZwWaitForSingleObject+0xc 0f1ee68c 77f42044 00000680 1020b5a3 10264780 ntdll!RtlpWaitForCriticalSection+0x126 0f1ee694 1020b5a3 10264780 00000021 0f1ee6d8 ntdll!RtlEnterCriticalSection+0x46 0f1ee6a4 102129da 00000009 00000000 0f1ee7cc MSVCRTD!_lock+0x93 0f1ee6d8 102129a6 00000021 00000001 00000001 MSVCRTD!_nh_malloc_dbg+0x2a 0f1ee6f4 1020e2cf 00000021 00000001 0f1eff44 MSVCRTD!_nh_malloc+0x16 0f1ee708 104b7a69 00000021 0f1ee728 104ad0d2 MSVCRTD!operator new+0xf 0f1ee714 104ad0d2 00000021 00000000 0f1eff44 MSVCP60D!std::_Allocate+0x19 0f1ee728 1048ba18 00000021 00000000 00000000 MSVCP60D!std::allocator<char>::allocate+0x12 0f1ee770 1048bccc 00000017 00000000 0f1eff44 MSVCP60D!std::basic_string<char,std::char_traits<char>,std::allocator<char> >::_Copy+0x58 0f1ee784 1048a005 00000017 00000001 0f1eff44 MSVCP60D!std::basic_string<char,std::char_traits<char>,std::allocator<char> >::_Grow+0x10c 0f1ee798 1048a060 0c136674 00000017 0f1eff44 MSVCP60D!std::basic_string<char,std::char_traits<char>,std::allocator<char> >::assign+0x15 0f1ee7ac 10489ad7 0c136674 0f1eff44 0f1eff84 MSVCP60D!std::basic_string<char,std::char_traits<char>,std::allocator<char> >::assign+0x20 0f1ee7bc 0c0d9e1f 0c136674 0f1eff40 1020d797 MSVCP60D!std::basic_string<char,std::char_traits<char>,std::allocator<char> >::basic_string<char,std::char_traits<char>,std::allocator<char> >+0x27 0f1eff84 1020bf53 0de09ba8 00000000 00000000 worklib!JobThread::execute+0x8f 0f1effb8 77e4a990 0de09bf0 00000000 00000000 MSVCRTD!_beginthreadex+0x133 0f1effec 00000000 1020bee0 0de09bf0 00000000 kernel32!BaseThreadStart+0x34 So it appears that the malloc/heap/whatever-you-call-it lock is somehow munged. None of the other threads reveal anything interesting. ------------------------------------------------------------------------------- Summary: I considered the possibility of heap contamination, but using gflags I enabled full page heap and every other form of heap checking, but there appear to be no problems there. I am suspicious that there is something else at work because these scenarios happen exactly the same every time. As I mentioned before, this code has been working perfectly on Windows uniprocessor systems for more than a year now. The only variable is the multiprocessor environment. I am seriously thinking that this is system related. I've noticed that there have been some deadlock related fixes for wldap32.dll, including a recent hotfix that postdates the release of Windows 2003. I'm wondering if this would fix our problem? I eagerly await any new ideas on this issue! I am pretty much out of them at this point. If I can provide further information on this, please ask. Thanks for reading! Regards, Marc Tag: bitfield optimizations Tag: 232683
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    - Can rebasing affect correctness of information in the map file generated before? Hi everybody For some strange reasons offsets in dlls loaded into memory do not match those, mentioned in map file. We suspect that this happens due to automatic rebasing of all the binary modules involved in workspace at the end of complete build of all the projects. Can this possibly be the case and how to avoid it? It looks like order of some sections is changed. Quite often offsets exceed the last offset mentioned in the map file. We generate map file with options /map /MAPINFO:LINES /MAPINFO:EXPORTS during building of a particular project. Rebasing is made after all the projects were built and involves all the modules that will be loaded: rebase.exe -b 0x60060000 [module ...] Kind regards, Antonio Tag: bitfield optimizations Tag: 232682
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    - how to compile ".hh" file? (how can i assoiate a tool) Hi, I am having ".... No compile tool is associated with the file extention" message when I try to compile a .hh file. Tag: bitfield optimizations Tag: 232672
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  - 1
    - convert unsigned char array from managed to unmanaged Do you know how to convert unsigned char array from managed to unmanaged e.g. unsigned char charArray __gc[] convert it to unsigned char charArray_[] and vice versa Thanks Tag: bitfield optimizations Tag: 232670
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    - deallocating vector storage The following is a thread from c.l.c++...since the behavior is apparantly platform-dependent, I'm looking for the best solution for MSVC++ 6.0 and also for 7.1 if it is different. Regards, Ryan Tino wrote: > In TC++PL (third edition), Section 16.3.8, Stroustrup gives the > following as a way to give memory from a std::vector back to the > system: > > vector<int> tmp = v; // v.size() == 0 > v.swap( tmp ); // v now has capacity of tmp (default), extra capacity > returned to system > > We need to have a general method that returns memory back to the > system for vectors which are no longer needed, but have not yet gone > out of scope. Are there alternative suggestions for accomplishing > this? There is no guarantee that the storage will be returned. Swapping with an empty vector, clearing the vector, resizing it to 0, all are good attempts to accomplish what you need, but the Standard makes no promises WRT the memory allocation behaviour. It's all platform-dependent and implementation-dependent, I believe. V Tag: bitfield optimizations Tag: 232665
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    - Which interfaces should be referenced in coclass definition of idl file? Hi everybody, Is there any rule or principle based on which one can decide which interfaces from those supported by the object to include into coclass definition and which not? What influence does it have depending on where component will be used: C++, Visual Basic, VBScript (Internet Explorer), Delphi etc. ? For example in the following case when I try to insert control into Visual Basic, it just hangs. [ uuid(BBBBBBBB-BBBB-BBBB-BBBB-BBBBBBBBBBBB), // actual guid replaced helpstring("MyClient class") ] coclass MyClient { [default] interface IMyDualInterfaces; [default, source] dispinterface _IMySourceEvents; interface IMyCustomInterfaces0; interface IDispatch; interface IMyCustomInterfaces1; interface IMyCustomInterfaces2; interface IViewObjectEx; interface IViewObject2; interface IViewObject; interface IOleInPlaceObjectWindowless; interface IOleInPlaceObject; interface IOleWindow; interface IOleInPlaceActiveObject; interface IOleControl; interface IOleObject; interface IPersistStreamInit; interface IPersistPropertyBag; interface IPersist; interface ISupportErrorInfo; interface IConnectionPointContainer; interface ISpecifyPropertyPages; interface IQuickActivate; interface IPersistStorage; interface IDataObject; interface IProvideClassInfo; interface IProvideClassInfo2; interface IMarshal; interface IObjectSafety; interface IConnectionPointContainer; }; Any reference to an article that might help will be greatly appreciated. Thanks in advance, Antonio Tag: bitfield optimizations Tag: 232664
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    - Re: windows taskbar and start menu Concerning the context menu, I use a tool called HPS HwndSpy (http://www.highplains.net/hwndspy.html) and it displays the HWND of the context menu. I'm not sure this will really help you - the HWND is recreated each time you right-click on the taskbar. Tag: bitfield optimizations Tag: 232663
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    - DLL with imports that should be used from different mainprogr Dear Gurus, I am on MSDEV 6.0 working from the command line. My Code is C Code. I am trying to generate a DLL that imports symbols from a main program. The DLL should be used by different main programs that all export the same symbols. The usual approach, if the DLL is only used by one main program would be to simply link the DLL against the export library of the main program. However if I do exactly that, then the other main programs will crash with the DLL when the DLL calls functions from the main program. (the reason being that the dll has somehow incorporated the name of the main program of which the symbols were imported at DLL link time). So how can I properly create a DLL that imports symbols from the main program without telling the DLL anything else then the names of the symbols that will be imported? And how can I tell the DLL the imported symbolnames without using the export lib of a main program? thank you very much for any insights Wolfgang Tag: bitfield optimizations Tag: 232657
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    - array of handles arithmetic C, win32, VC7 Suppose I have an array of handles, like this: HANDLE* thread_handle; int max_threads; ... max_threads=256; ... thread_handle=calloc(max_threads, sizeof(*thread_handle)); if (thread_handle==NULL) return 1; There are more handles than a function like WaitForMultipleObjects can use. http://msdn.microsoft.com/library/en-us/dllproc/base/waitformultipleobjects.asp The handles may point to threads that have already done _endthreadex(0), there are never more than 64 threads in existence at the same moment. Threads are usually short lived (they wait for a UDP network answer). The maximum amount of thread handles is 64, but there may be up to 256 used. Is it possible to point to the 65th, 129th, 193th handle and run that function again? You can do this with strings because they are contiguous array of bytes, but does it work the same way with handles? May be I'm doing something stupid here, help is appreciated. Bert Tag: bitfield optimizations Tag: 232653
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    - How to check from destructor whether it was called due to exception or normal exit from the scope? Hi, everybody Is there a reliable way of detecting whether destructor of a local object was called due to stack unwind (exception) or normal exit from the scope? This check has to be made inside destructor of this local object. If there is no portable C++ way of doing this, hacks for Windows and/or MSVC6 generated code (with checking some registers etc.) will do. Thanks in advance, Antonio Tag: bitfield optimizations Tag: 232646
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    - How to create a timer event in VC++ which does the functionalities of VB's 'Timer control' - This should be compatible to Unix OS also. Hai, I am having a winsock applicaiton, in which I should check for messages in regular time period. This can be implemented in VB by using the timer control, what is the equivalent of 'timer control' in VC++? Can any one send me a sample application for creating a timer event in VC++ which does the functionalities of VB's timer control, or is there any other solution? The solution should be compatible with Unix OS also, as the application is going to be implemented in both Windows and Unix OS. Thanks. Uma Tag: bitfield optimizations Tag: 232642
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    - rpc server not available What would be the most likely place that causes the return value "RPC server not available" when trying to connect to a remote machine? o I have checked DCOM settings Auth=None,Impersonate - both PC's have the same settings. Server is launched by the administrator account with correct password. Server is already running as I try to connect. o I am using the correct GUID o Both machines are in the same workgroup although I am using the IP address of the remote PC to connect in the COSERVERINFO struct (other fields in COSERVERINFO are 0) o CoCreateInstanceEx is used with CLSCTX_INPROC_SERVER|CLSCTX_LOCAL_SERVER|CLSCTX_REMOTE_SERVER tia/ak -- You are only young once, but you can stay immature indefinitely. Tag: bitfield optimizations Tag: 232632
  - 10
    - Get remote env. variable Anyone know of an API to get an enviornment variable on a remote machine? Thanks Tag: bitfield optimizations Tag: 232626
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    - GetVolumeNameForVolumeMountPoint I am trying to use GetVolumeNameForVolumeMountPoint, but it keeps giving me an undeclared identifier error with VC 6.0. According to the MSDN I am supposed to include Windows.h and use the Kernel32.lib library, which I am doing without success. Any ideas? Thanks, Robin By the way here is the link to the msdn: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/base/getdrivetype.asp -- Using Opera's revolutionary e-mail client: http://www.opera.com/m2/ Tag: bitfield optimizations Tag: 232617
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    - How To find out New Incoming Mail in Outlook? Hi Guys, I catch the New Mail Event in Outlook. When New mail is coming, my code gives an alert msg. But I can't find Which is the current new mail. I have an idea to get Unread mails. But It gives Today unread mail, Previous day Unread mails and New Mail. From these How can i get the New mail? Pls help me. -- Computer Ganesh Tag: bitfield optimizations Tag: 232601
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    - Suspicious error VC 7.1 won't compile this ///////////////////////////////////////////////////////////////////// #include <map> namespace N { struct K {}; } struct T {}; // namespace N { bool operator<(const K&, const K&){ return true; } } bool operator<(const N::K&, const N::K&){ return true; } int main () { std::map<N::K, T>().insert(std::pair<N::K, T>(N::K(), T())); } ///////////////////////////////////////////////////////////////////// Uncommenting the namespaced operator will help. Sergei Tag: bitfield optimizations Tag: 232596
  - 14
    - First Enum Default value When I open an enum structure and I don't name it with a value such as enum abc { APPLE, ORANGE, etc } What is the default value of "APPLE"? Is it 0 or 1? Thanks Jack Tag: bitfield optimizations Tag: 232590
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    - CreateProcess I have a MFC SDI program that calls CreateProcess from a Dialog. The following is part of the code: case ID_COMPILE_CODE: { CString strFile("nmake /X 'k:\\Test\\Debug\\Output.txt' /f test.mak CFG='Test - Win32 Debug'"); CString strAPI("API=Win32"); CString strPath("e:\\microsoft visual studio\\vc98\\bin;"); strPath += "e:\\microsoft visual studio\\common\\msdev98\\bin;"; strPath += "k:\\test"; CString strLib = "e:\\microsoft visual studio\\vc98\\lib"; CString strInclude = "e:\\microsoft visual studio\\vc98\\include"; strPath = "PATH=" + strPath; strLib = "LIB=" + strLib; strInclude = "INCLUDE=" + strInclude; _putenv((LPCSTR)strPath); _putenv((LPCSTR)strLib); _putenv((LPCSTR)strInclude); _putenv((LPCSTR)strAPI); STARTUPINFO si; ZeroMemory(&si, sizeof(STARTUPINFO)); si.cb = sizeof(STARTUPINFO); PROCESS_INFORMATION pf; ZeroMemory(&pf, sizeof(PROCESS_INFORMATION)); if (CreateProcess(NULL, strFile.GetBuffer(strFile.GetLength()), NULL, NULL, TRUE, HIGH_PRIORITY_CLASS, NULL, NULL, &si, &pf)) { if (WaitForSingleObject(pf.hProcess, INFINITE) != WAIT_FAILED) SetErrorMsg(CString("No Errors")); else SetErrorMsg(CString("WaitForSingleObject(...)")); CloseHandle(pf.hThread); CloseHandle(pf.hProcess); } else SetErrorMsg(CString("CreateProcess(...)")); } return TRUE; . . . void CDlg::SetErrorMsg(CString strMes) { LPVOID lpMsgBuf; FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&lpMsgBuf, 0, NULL); CString strErrMsg("Error in processing " + strMes + "\n" + (LPTSTR)lpMsgBuf); AfxMessageBox(strErrMsg); LocalFree(lpMsgBuf); } I get the message that the process was successful, but there is no .obj nor .exe files in the directory. Any Ideals? Tag: bitfield optimizations Tag: 232584
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    - about <advanced windows 3rd> chapter 5 The writer says that : In Windows NT,the highest 64KB memory of the lower 2GB address space of a process can protect the upper 2GB system space from destruction. But what I puzzled was: how can the 64KB memory do? It seems that I can use some memory lower of the 64KB ,and use the WriteProcessMemory function to get into the upper 2GB. thanks (I'm a beginner) Tag: bitfield optimizations Tag: 232582
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    - How to flush the ostringstream buffer? Hi, I have a quetion about to refresh the ostringstream buffer: like this. ostringstream buffer; buffer << 245; // then the buffer.str() = "245"; ..... //next I want using this buffer again but I don't need the content of buffer before, so buffer.flush() buffer << 456; //here I hope I can get "456" from buffer.str() but the buffer still is 245456, seem the buffer.flush not take function? why? who can help me? Thanks adanveced, Bill Tag: bitfield optimizations Tag: 232581
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    - Explicit specialization of class template member functions Is this supported in VS C++ 2005? For example, template <class T> class foo { void goo(void) { } }; template <> void foo::goo<int>(void) { } Tag: bitfield optimizations Tag: 232577
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    - Remote file exists ? hi I am using IBindStatusCallBack to get files on a server. Whats the easiest way to find out if a URL points to an existing file ? thanks Tag: bitfield optimizations Tag: 232568
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    - Bit-related question My question mentions MFC, but it is actually just a matter of bit arithmetic. If you are working on an MFC application having a frame, seeing the following statement is not uncommon: cs.style &= ~FWS_ADDTITLE; // remove extra stuff from title My question is, why is the value simply not subtracted like: cs.style -= FWS_ADDTOTITLE; The resulting style is the same for both. Is there a style (i.e., value) that could exist such that subtracting would produce a different result than ANDing the one's complement? I've tried with several starting values but both ways produce the same value. Thanks, DC Tag: bitfield optimizations Tag: 232558
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    - clock() Is it a known issue that in VC++ RTL the function 'clock()' reports the wall clock instead of CPU time used? I ran this test program on Windows and Unix: ----------------------------------------- #include <iostream> #include <ctime> using namespace std; int main() { time_t t0 = time(0); clock_t c0 = clock(); for (int i = 0; i < 10; ++i) { cout << "push > " << flush; char a; cin >> a; cout << endl; } cout << "Difference in wall clock is " << difftime(time(0), t0) << endl; cout << "Difference in CPU ticks is " << double(clock() - c0) / CLOCKS_PER_SEC << endl; return 0; } ------------------------------------------- and got very similar values on Windows and quite different values on Unix. It seems that on Windows it just takes the time() at the beginning and then 'clock' simply takes the difference between current time and the stored value and multiplies it with CLOCKS_PER_SEC... I know of GetProcessTimes() function, but couldn't 'clock()' be implemented to use it? Thanks. Victor Tag: bitfield optimizations Tag: 232556
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    - CDaoDatabase + Access97 Limits Does anyone if there is a limit on the number of fields or the number of tables in a CDaoDatabase database? My code suddenly won't run after I have added a few more fields in one table and I wonder if I have exceeded something? If Yes, then does anyone know any workarounds? GT Tag: bitfield optimizations Tag: 232551
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    - Gettin a compile error error C2229: struct '__unnamed' has an illegal zero-sized array i am getting above error for this " unsigned char buffer[4096]; " at this line static int iax_send(struct iax_session *pvt, struct ast_frame *f, unsigned int ts, int seqno, int now, int transfer, int final) { /* Queue a packet for delivery on a given private structure. Use "ts" for timestamp, or calculate if ts is 0. Send immediately without retransmission or delayed, with retransmission */ struct ast_iax2_full_hdr *fh; struct ast_iax2_mini_hdr *mh; struct { struct iax_frame fr2;/* Buffer -- must preceed fr2 */ unsigned char buffer[4096]; //--------------- this line has the error } buf; struct iax_frame *fr; ............. Code continues thanks Rj Tag: bitfield optimizations Tag: 232544
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    - External Dependencies Hi guys How i can insert files in External dependencies folder ??? Thank Tag: bitfield optimizations Tag: 232542
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    - How to convert Format Outlook mail Received Time? Hai Guys, I have an addin for Outlook. I get the received time for incoming mails. But time is the type of DATE datatype(i.e. in double) How can I convert that into Our Normal Time and Date Format? For Examble I got the DATE as 38097.542242106 I want as 7.30 PM July 7 2002. How can I format that? Pls reply me. Thanks. -- Computer Ganesh Tag: bitfield optimizations Tag: 232533

Hi, everybody.

Is it possible to tell vc compiler to ignore bitfields, that
is to treat them just as normal variables? I need to run
purify on my program and in trips over all the variables
that are packed into bitfields saying it is an uninitialized
memory reference.
There are so many messages like this, that to track real
UMRs is impossible.

thanks in advance

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