templates & optimization

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- Previous
  - 1
    - Missing Win32 API function In the MSDN documentation supplied with VC++ 6.0 it mentions a function called SetFilePointerEx. If I try to use it the compiler says it's undefined. I've searched in all the header files and can't find it. Is this an MSDN error or is there something else going on here? I notice that it is also mentioned in the latest MSDN edition and that it's also not included in the header files on VS.NET 2003 Regards, Terry Stebbens. Tag: templates & optimization Tag: 214028
  - 2
    - Whatever happened to ThemeExplorer on MSDN? The on-line help files contain links to the code for this program but it isn't there. A search turned up nothing. Was it pulled because of some errors? Norm Tag: templates & optimization Tag: 214006
  - 3
    - compiling error in C++, Fortran, C -- newbie question I got a executable program from my former colleague who has left my company. Its main function looks like this: int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { int nRetCode = 5; SL_Begin_Process(__argc,__argv, NULL, "Customer_Test", ""); ...... } In this program, it uses C and Fortran code. When I compiled this program in Debug mode, I got the following error: Customer_Test.obj : error LNK2001: unresolved external symbol ___argc Customer_Test.obj : error LNK2001: unresolved external symbol ___argv Debug/Customer_Test.exe : fatal error LNK1120: 2 unresolved externals Error executing link.exe. My question is why these errors occured? In a C program, argc and argv is defined in the main function like int main(int argc, char *argv[]){}. However, I can not find where __argc and __argv are defined. If I compiled in Release mode, it compiles successfully without such error. Any of your help is greatly appreciated. Tony Tag: templates & optimization Tag: 213952
  - 4
    - Initialization of Constant Static members In the vc++ 2003 is possible to initialize integral constant static members inside the class structure, according to standar class MyClass { static const int n = 1000; }; But I have tested that in VC++ is NOT obligatory to define space for the variable out of .H const int MyClass::n; Is correct not declare the space for variable? Is according to standar? Thank you in advance Javier Tag: templates & optimization Tag: 213924
  - 5
    - global variables How can I define a variable, e.g. "MYPROC MyProc;" so that it can be used in everywhere, in Main.cpp, or Blahblah.cpp? I've tried to declare this variable in a header file, then having both Main.cpp and Blahblah.cpp including this header file, but seems it is not OK to do so, how can I fix this problem? I appreciate any help. David Tag: templates & optimization Tag: 213911
  - 6
    - Privileged Instruction exception on QueryInterface Hi, I'm trying to check if a VARIANT* parameter sent from a VB 6 client is an IDispatch value and also which interface it is. This is the code: /* --------------------------*/ if(!(FeatureArguments->vt & VT_DISPATCH)) return E_INVALIDARG; ICSTAForwardingInfo * fwdInfo = NULL; IDispatch * idisp = FeatureArguments->pdispVal; hr = idisp->QueryInterface(IID_ICSTAForwardingInfo, (void**)&fwdInfo); if(hr != S_OK) return E_INVALIDARG; /* --------------------------*/ The ICSTAForwardingInfo interface is implemented in the same DLL, an instance of that is created in VB6 and then passed to the DLL as a VARIANT*. But I'm getting a 'Privileged Instruction' error on the QueryInterface call. Any hints about this issue ? Thanks in advance, -- []'s Raul M. Fragoso Tag: templates & optimization Tag: 213908
  - 7
    - How to create a new process for current window program? How to create a new process for current window program? I see that createprocess will execute a program in new process. but I only want to copy current process and do something different. ( just like fork() on unix ) How can I do that?? thanks CYShao Tag: templates & optimization Tag: 213906
  - 8
    - Callbacks in DLLs Hello, I'm having trouble about setting up a callback function in a DLL. I'm not sure what I should do to store the pointer to the callback function of the test application from the DLL, so that it will persist after the function DefineCallback() has ended... Here I use extern to try to achieve it but seems I have problems with pointers... This is the code of the DLL: --dll.h typedef int (PASCAL *GENERALCB)(UINT uMsg, DWORD dwSize, int *iStatus, char *lpString1, char *lpString2); extern GENERALCB *MyGeneralProc; HANDLE PASCAL DefineCallback(HANDLE hHost, char *lpFilename, char *lpDest, UINT uOffset, GENERALCB *GeneralProc); --dll.cpp : : HANDLE DefineCallback(HANDLE hHost, char *lpFilename, char *lpDest, UINT uOffset, GENERALCB *GeneralProc) { MessageBox(0, "This is DefineCallback().", "dll.cpp", MB_ICONINFORMATION); MyGeneralProc = GeneralProc; return 0; } What's wrong in my code? How should I correct it so that I can have it running? I'll be glad if somebody can help me. David Tag: templates & optimization Tag: 213900
  - 9
    - how to view the stack when there is a messagebox in front Have anyone tried breaking the execution when there is a messagebox popped up my the ::MessageBox(....) function or AfxMsgbox(...) The call stack just shows 7ffe0304() USER32! 77d746fe() USER32! 77d61e6d() Is there any easy way to see the call stack at this point.? thanks fleming Tag: templates & optimization Tag: 213885
  - 10
    - DAMAGE: after Normal block I am getting an error that I don't understand. Compiler is VC7 on Windows XP Pro. I am not a c/c++ guru so any help would be appreciated. I have already scanned the newsgroups and understand that this error comes from writing past an allocated memory block, but how am I doing this? void Parameter::ValueDup(double val) { if (value != NULL) delete value; sprintf(temp,"%lf",val); value = strdup(temp); } This is a function in a class named Parameter... The error comes on the last line of the function (strdup). I have checked the variables and everything seems fine. Variable values just before the crash are the following... val = 0.00000000000000000 temp = 0.000000 value = NULL Both "value" and "temp" are class variables originally declared as follows... static char temp[256]; char *value; --> set to NULL in constructor Any ideas? Tag: templates & optimization Tag: 213882
  - 11
    - Re: Viewports - Viewport or pspace layout? OOPS wrong group. Sorry! Tag: templates & optimization Tag: 213881
  - 12
    - Viewports - Viewport or pspace layout? I am trying to manipulate viewports.. when I perform a blocktableiteraton on each paperspace layout, I get 1 more viewport than I would expect... I presume, therefore, that each paperspace is also a viewport. How can I tell if a AcDbViewport object is a paperspace layout, or if it is, infact, a viewport to model space? Thanks, MS Tag: templates & optimization Tag: 213880
  - 13
    - % in printf? How do I put a % sign in a printf, ie printf("\n %: %.2lf",someVar); The first % seems to do nothing. MS Tag: templates & optimization Tag: 213872
  - 14
    - Class Array Initialization I have a class that I need to have an CString and doubles, but I am not getting the desired effect... i.e., I think that the class member arrays are not being initialized, only arrays local to the constructor. I need to perform lookups, i.e. CNecTblImpedence tbl; x=4; tbl.dXSteel[4] + tbl.dRSteel[x] ; etc.. I thought arrays would be easy enough... what am I doing wrong? I want the in the CNecTblImpedence class, as I may be adding some member functions later. class CNecTblImpedence { public: CNecTblImpedence(); virtual ~CNecTblImpedence(); static CString strSize[21]; static double dXSteel[21]; static double dRSteel[21]; }; CNecTblImpedence::CNecTblImpedence() { // data from NEC 2002 Table 9 // dRSteel and dXSteel are in Ohms/1000' CString strSize[]={"14","12","10","8","6","4","3","2","1","1/0","2/0","3/0","4/0","2 50","300","350","400","500","600","750","1000"}; double dXSteel[]={0.073,0.068,0.063,0.065,0.064,0.060,0.059,0.057,0.057,0.055,0.054 ,0.052,0.051,0.052,0.051,0.050,0.049,0.048,0.048,0.048,0.046}; double dRSteel[]={3.1,2.0,1.2,0.78,0.49,0.31,0.25,0.20,0.16,0.12,0.10,0.079,0.063,0 .054,0.045,0.039,0.035,0.029,0.025,0.021,0.018}; } Tag: templates & optimization Tag: 213866
  - 15
    - threads & critical sections I understand what a critical section is supposed to do, however I was wondering if someone could elaborate: Say we develop a list class (typical doubly-linked list) and as a member we def a flag of type bool. When the Add, Insert, or Remove functions of that list are called, they wait for the flag to turn off: list::add (T* value) { while (listlocked); // wait if set listlocked=true; [Add my node] listlocked=false; } I'm sure because I'm just now introducing myself to threading, I'm missing a big chunk of the issue that is perhaps masquerading in the unknown caves of Windows- but is this essentially what is going on? I only ask because MSDN constantly refers to "memory allocation" when processing critical sections and mutexes. TIA Tag: templates & optimization Tag: 213848
  - 16
    - will "variable;" always be optimised to nothing Hi, I am curious about the following code void fn(int a) { a; } will the line 'a;' be optimised to nothing? I assume it will but I'd like to be sure. The reason for doing this is to avoid the Level 4 warning about unreferenced arguments obviously the other alternative is to go void fn(int) { } but I have seen the first version used and am curious as to whether it has any overhead Vin Tag: templates & optimization Tag: 213846
  - 17
    - Error I am running a Multithreaded VC application and some times I am getting the error in my application when it runs on the production server. "The instruction ********** referenced memory at "***********". The memory could not be read. Click OK to terminate the program. Click on CANCEL to debug the program. But when I test the same on other machines I am unable replicate . As it is production server I am unable to Debug in that system. Both systems have same configurations (windows XP professional, 2002 version, service pack1) Can someone let me know what are all the general circumstances which can lead to this type of errors from application point of view and O/S point of view. TIA, Gary Tag: templates & optimization Tag: 213835
  - 18
    - Memory mapped files Hi there, I've been looking at the MapViewOfFileEx() api to access a persistent large database. Specifically I need to stream parts of a large terrain database for visualisation. The data size is intially limited to a few hundred mb but may grow to be many gbs. Using the mapviewoffilex i can set a fixed address for my file create it then reload it at the same address and all my pointers etc into it are still valid. I cannot seem to find in the docs though any idea of how to choose an address the base address. Experimental figures work fine but if it broke in the field after a few revisions of windows it would be a nightmare. Is there a good way to pick the base address? Or am i going about this all wrong? Cheers Martin Tag: templates & optimization Tag: 213832
  - 19
    - How to call VB ActiveX DLL component thru VC Hi Guys Can someone please let know the way to triggle VB ActiveX DLL component's public function through VC Thanks in advance Best regards, sky Tag: templates & optimization Tag: 213825
  - 20
    - article 76684 (sscanf function) Hello, in the KB article 76684 it is not clear whether this problem related 16 bit DLL only or it also a problem in 32 DLL? If this is also a problem in 32 bit dll,it is not clear whether there is a problem using sscanf within dll when using local buffers/variables. Or only when transferring buffers/variables to the dll from an application . Thanks in advance. Tag: templates & optimization Tag: 213823
  - 21
    - char* access violation Can somebody tell me why does this code produce an access violation error? char* x = "1234567890"; x[0] = '0'; Thank you, Mark D. Tag: templates & optimization Tag: 213819
  - 22
    - Error I am running a Multithreaded VC application and some times I am getting the error in my application when it runs on the production server. "The instruction ********** referenced memory at "***********". The memory could not be read. Click OK to terminate the program. Click on CANCEL to debug the program. But when I test the same on other machines I am unable replicate . As it is production server I am unable to Debug in that system. Both systems have same configurations (windows XP professional, 2002 version, service pack1) Can someone let me know what are all the general circumstances which can lead to this type of errors from application point of view and O/S point of view. TIA, Gary Tag: templates & optimization Tag: 213817
  - 23
    - How to? How to set the tcp/ip parameters (address, gateway etc) programmatically ???? Tag: templates & optimization Tag: 213804
  - 24
    - Need to interface a custom device? Hello, I dont know maybe this would be the millionth time somebody is asking this question. I have to write an app in VC to control a custom IO card. There are two things i need control over: I/O ports and intterupts. I know the trick used for port access using IOPM bitmap but intterupt still dont work. Could anybody help me with these questions: What is the best way to interface to hardware in windows? Drivers have got me confused there are so many types VDDs, Vxd, wdm... some work on 98 others on NT, is there any one standard? Windows DDK is not free, is there an alternative? Is development from scratch possible or feasible? Any help welcome. Thanks in advance. Tag: templates & optimization Tag: 213802
  - 25
    - /Ob0 in VC7.1 I have a project that will not blow up if it was built with any optimizations or function inlining. I was able to disable these options in vc6, but vc71 only allows choosing /Ob1 or /Ob2. Is there a solution? Justin Michel Tag: templates & optimization Tag: 213800
- Next
  - 1
    - How to know ENTER is hit in Win32 Edit Ctrl I'm using a Win32 edit ctrl (not MFC and not in a dialog). I have a parent window that creates and uses the edit ctrl as a child window. Everything works well except that the escape and enter keys produce a beep and don't actually end the edit sequence. How do know when the user has hit escape or enter or tab in the edit box (surely this is a way without subclassing the edit box window) so I can complete the edit sequence (get text, change focus etc.)? Thanks, Robb Tag: templates & optimization Tag: 213796
  - 2
    - array of values into clipboard as bitmap Assume I have 100x100 array with pixel values .. how do i copy them into clipboard as bitmap .. tutotial at codeguru or codeproject .. talk to copying CBITMAP or DIB .. All i have is array values .. I did write some code using CBitmap .. but when I try to paste it another application like "word" or "MS Paint" .. I get "out of memory" & "clipboard data error" respectively. Any help wud be great. CBitmap *m_Bitmap; m_Bitmap=new CBitmap; void *m_pBits; //create 24-bit color bitmap .. int nWidth=((((int)SelectBox.Width()*8)+31)&~31)>>3; m_pBits=new BYTE[nWidth*SelectBox.Height()]; BYTE *dest=(BYTE *)m_pBits; int *imagePtr=pDoc->image->GetImageBits(); int *src; for(int row=SelectBox.top;row<SelectBox.bottom;row++) { src=(imagePtr+(row-1)*(pDoc->image->GetWidth())); dest=(BYTE *)m_pBits+(row-SelectBox.top)*nWidth; for(int col=SelectBox.left;col<SelectBox.right;col++) { *dest=*(src)/255; dest++; *dest=*(src)/255; dest++; *dest=*(src)/255; dest++; src++; } } m_Bitmap->CreateBitmap(nWidth,SelectBox.Height(),1,24,m_pBits ); //load pixel values ::OpenClipboard(AfxGetApp()->m_pMainWnd->GetSafeHwnd()); ::EmptyClipboard(); ::SetClipboardData (CF_BITMAP, m_Bitmap->GetSafeHandle()); ::CloseClipboard(); m_Bitmap->Detach(); delete[] m_Bitmap; delete[] m_pBits; -- Regards, Madan S Ankapura Programmer-Infosystems Spendlove Research Foundation Tag: templates & optimization Tag: 213794
  - 3
    - Using an enumerated type as variable for a dialog control instead of an int? I think the subject says it all, but here's the long version: I have a droplist combo box whose string contents describe the members of an enumerated data type. I used ClassWizard to create an int variable associated with it and that works, but requires type-casts to and from the associated program data item. I accidentally (really! I have no idea how this happened, it just popped up one morning about a week after I designed the dialog) used an enumerated type variable instead, e.g. ... eMyType m_eTypeIndex; and within DoDataExchange() there's the associated DDX call DDX( ... (int*)&m_eTypeIndex );. // this is from memory, it may not be exact but a C-type cast was there and ClassWizard choked on this, complaining that it needs to see a "constant or variable reference" where the lexical token starts with the cast. Restoring the dialog member variable to ... int m_eTypeIndex; and inserting the casts where needed in the dialog unitization and termination sections made ClassWizard healthy again. BUT the code with the cast compiled and worked perfectly! (I guess because it's right.) It would be slightly more desirable to have the member data item be the enumerated type rather than the generic int but certainly not at the expense of being able to use ClassWizard. Is any compromise possible? TIA Norm Tag: templates & optimization Tag: 213787
  - 4
    - Socket Programming - Proxy Hi, I'm trying to learn socket programming.To start with I'm trying out TCP/IP ( this is the sample i found first). The tutorials are good and gives examples - if we are directly connected to the net. How to go about it if i have to connect to the net through PROXY. Any snippet or links??? Thanks, Gobi. Tag: templates & optimization Tag: 213776
  - 5
    - INPUT stucture undefined error in VC++ Hi, I have a situation where I need to send keyboard input to the system. I intend to use SendInput function. To use this function I need to use the INPUT structure as a parameter to this function. This structure is defined in Winuser.h, which I have included in my source. I have declared a variable of the type INPUT in my program. When I compile the program I get an error saying 'INPUT' stucture is not declared. I am using VC++ 6.0 on Win 2000 machine. Can anyone pls tell me why this problem? Regards. Shailesh. Tag: templates & optimization Tag: 213771
  - 6
    - I just feel confused about VC and VB I just feel confused about VC and VB, since windows is designed by using c language, but we still can design VB applications on the windows platform, does that mean VB is also built on the c language, if not, why these two different languages can be used together under windows environment and how they work together? The Best Regards Paul Tag: templates & optimization Tag: 213764
  - 7
    - CreateWindow Help!! Hello all, I am having some problem with the CreateWindow function. I am adding some edit boxes dynamically on top of my Dialog box which which opens as a Model dialog box from another dialog box i use something like this to create the edit boxes CRect rc; ::GetWindowRect(this->m_hWnd,&rc);//handle of dialog box HWND g_hwndEdit = CreateWindow ( TEXT("edit"), NULL, // Window text dwStyle, // Window style rc.left-200+i*40,// x coord of upper leftcorner rc.top-50, // y coord of upper leftcorner 20, 17, this->m_hWnd, NULL, NULL, NULL); CRect rcEdit; ::GetWindowRect(g_hwndEdit,&rcEdit); Now i think that the upper left corner coordinates that i give as input to CreateWindow should come as the output from rcEdit in the above code. But the values that come in rcEdit are different from what i give as the x coordinate and y coordinate in the CreateWindow function. Also there is something i am confused about when i create a separte application for this dialog box the values that come in rc(dialogs Rect) are the rc.top=0;rc.left=0;rc.bottom=116;rc.right=78 Also in this case CreateWindow and its corresponding GetWindowRect has the same upperleft corner but when i open this dialog using DoModal() from another application than the different values come like: r.top=104;rc.left=62;rc.bottom=116;rc.right=78 and now the values that i send to createWindow are diff from its GetWindowRect(g_hwndEdit,&rcEdit) I really need to find out the coordinates of the edit box i draw dynamically as i have to draw lines from these edit boxes to other edit boxes dynamically (think of edit box as nodes and i need to connect these nodes using lines) Can anyone Help!! Ritu Tag: templates & optimization Tag: 213745
  - 8
    - Problem with network configurations -VC++ 6 I need to set the configurations of network, gateway, DNS, IP, etc... Please somebody can help me! Some API for this, necessary exists to use this API in Win9x and NT/2K/XP Best regards, Anderson Tag: templates & optimization Tag: 213740
  - 9
    - SNMP on Windows 2003 I posted this in the networking group and found no responses. Hence posting it here just in case there is anyone who has made similar observation. == Hi Folks, I have strange problem with SNMP Mgr calls, could you please confirm if you have seen this. I am not sure if its a bug from my side or API's side. I have a SNMP manager doing tons of SNMP request calls every so often to few remote agents. I have a few thread doing all this and I make sure that a thread that opens snmp handle uses it and closes it. I see to that no thread uses snmp handle opened by another thread. What I see is, on Windows 2000 it is quite OK and works fine. But on Windows 2003, after a while, all my open snmp open calls are failing. When I call GetLastError(), strangely, it returns NoError and message "Operation completed successfully". Do you have any suggestion on what I might be doing wrong or what I can do to set this thing right? I will appreciate your help in this regard. Thanks, Raghu Tag: templates & optimization Tag: 213737
  - 10
    - name of a dll I have a DLL that is being loaded by RunDLL32.exe and I need to get the name of the DLL itself and not the calling application. This DLL might have a changed name as well and I want to get the name of this DLL from inside itself. Tag: templates & optimization Tag: 213727
  - 11
    - Can compiler check formatting (printf-etc) types against arguments? When I spend some time programming with gcc in Linux I really appreciate the compiler's ability to type-check the formatting codes in a printf call against the actual types of the arguments supplied. Yeah, occasionally it's just nagging but it's caught some real boners. Is there any way to get the VC++ (6) compiler to do this too? TIA Norm Tag: templates & optimization Tag: 213722
  - 12
    - newbie C++ question from oldie C-programmer In C, if I wanted to create a function to determine if two structures were, say, different, I'd write something like: int DifferentMyStruct( struct MyStruct *a , struct MyStruct *b ) { return( memcmp( a , b , sizeof( struct MyStruct ) ); } In C++, I have to create an operator overloading BOOL MyStruct::operator != ( MyStruct b ) { ... } I've been writing variable-by-variable != tests for the contents of the overloaded operator function. Every book I've looked at says they use the one-at-a-time method for simplicity. Surely there's a better way. What is it? TIA Norm Tag: templates & optimization Tag: 213714
  - 13
    - Operator < return type Based on the error I got from something I wrote, the compiler expects the return type of operator < (and all similar comparison operators) to be "int". I had written BOOL MyClass::operator < ( MyClass ... ) and based on the linker error I got , the compiler expects the return type of operator < (and all similar comparison operators) to be "int". I'd expect, somewhere, in some standard header file, to find typedef int BOOL; 1. If this is the case, then why wasn't my operator as written acceptable? 2. If it's not defined that way, then how exactly is BOOL defined? TIA Norm Tag: templates & optimization Tag: 213700
  - 14
    - _WIN32_IE 0x0500 Hi I was wondering what would happn if I compile with _WIN32_IE version defines as 0x0500 and my program is run on system where shell was not "upgraded" to this system. Will it immediately crash after being run ? What kind of failures should I expect ? I want to use bigger tool tip text for my app, in version less than _WIN32_IE 0x0500 its limited to sixty four and in 0x500 its hundred and twenty eight. And I want as big tool tip as possible. Is it possible to dynamically link with the dlls, and check things runtime? I saw that its defined on compile time what will be the "szTip" array size for tool tips. Thanks a lot! Tag: templates & optimization Tag: 213696
  - 15
    - void operator == ??? I was just reading a book in which all of the examples of overloading the equality operator were typed void. This didn't make sense to me and I was hoping someone would have an explanation I could understand. TIA Norm Tag: templates & optimization Tag: 213692
  - 16
    - LNK2001 Errors: Any tips on resolving them in .NET 2002? Are their any tips or tricks in determining why I'm getting a LNK2001 (aka "Unresolved external") linker error? I've run into one that is total bullshit because everything is fine and mirrors another situation that is occuring in the code. I even removed all of the params to eliminate possible problems with that and it's still not working. I know a clean build can resolve a lot of goofy behavior but I'd rather not do that as this is a very large project that takes an hour to build from scratch. Thanks Tag: templates & optimization Tag: 213685
  - 17
    - Spurious complier error from interaction between UINT_PTR and ~0? Here is some code that compiled with VC70 and earlier but no longer compiles with VC71: #include <basetsd.h> class foo { public: foo(int x = ~0, UINT_PTR y = 0); } The error is: C2062: type 'int' unexpected I can reverse the order of the args, use something other than ~0 or something other than UINT_PTR and it works fine. It appears to be a problem only if ~0 and UINT_PTR appear close together in the argument list. Tag: templates & optimization Tag: 213667
  - 18
    - "continue" key word equivalent in VB is there an equivalent key word for C++'s "continue" in VB (.net) in this context? CString szLine; szLine = myReader.ReadLine(); while ( !szLine.IsEmpty() ) { if ( szLine(0) == '-' ) { szLine = myReader.ReadLine(); continue; // <-- HERE, so if szLine starts with "-" then // the rest of this loop is not executed this time round... } szLine = myReader.ReadLine(); // // rest of the loop code // } thanks! Daniel. Tag: templates & optimization Tag: 213655
  - 19
    - C2761 Error. Help! Hi. I got this in my codes: // specalization for vec2<short> template <> short Vec2<short>::length () const; When I compile, it reports the following error: Vec.h(510): error C2761: 'short Imath::Vec2<T>::length(void) const' : member function redeclaration not allowed with [ T=short ] How do I solve this? I'm using VC .net 2002. The codes compile well on linux though. :( Any help appreciated. Tag: templates & optimization Tag: 213643
  - 20
    - API to change network settings? Hi peoples!! How can i change my network settings using Win 9x or NT platform. Note: I am using Visual C++ 6 Abraços. ______________________ Anderson dos Santos Silva anderson@emacdigital.com.br Tag: templates & optimization Tag: 213634
  - 21
    - error LNK2005 I am completely flummoxed by a seemingly simple problem. I am getting the following series of compiler linking errors? Linking... WinMain.obj : error LNK2005: "int * pint_windowProcSuccess" (?pint_windowProcSuccess@@3PAHA) already defined in Misc.obj WinMain.obj : error LNK2005: "int * pint_winMainFailure" (?pint_winMainFailure@@3PAHA) already defined in Misc.obj WinMain.obj : error LNK2005: "char * pchar_mainWindowName" (?pchar_mainWindowName@@3PADA) already defined in Misc.obj WinMain.obj : error LNK2005: "struct HINSTANCE__ * hInstanceApp" (?hInstanceApp@@3PAUHINSTANCE__@@A) already defined in Misc.obj And more. I have three .h files (WinMain.h, Misc.h, resources.h) and two .cpp files (WinMain.cpp, Misc.cpp). All of the above ?offenders? are declared only in WinMain.h, e.g., int pint_windowProcSuccess[ ] = {201, 202, 203, 204, 205, 206, 207, 208, 209}; Each of the .h files have protective centennials of the form? #ifndef Misc_h #define Misc_h // ? code #endif // #ifndef Misc_h The includes for Misc.cpp are // Misc.cpp - for non-specific items // Include important Windows stuff #include <windows.h> #include <windowsx.h> #include <mmsystem.h> // Include important C/C++ stuff #include <stdio.h> // My includes #include "Misc.h" #include "WinMain.h" And the includes for WinMain.cpp are // DirectX includes // DirectDraw #include <ddraw.h> // My includes #include "WinMain.h" #include "resources.h" #include "Misc.h" Any idea what I am missing here? I am almost embarrassed to ask for help on this one! Best regards, Thomas Tag: templates & optimization Tag: 213631
  - 22
    - How to force an immediate writing of the printf() buffer content to console ??? I wrote something with printf() to the console (under Windows) in a DLL. Then I called back a routine and detected that the output of the later called code was written PRIOR to the previous text to the console. So I am searching for a way to force Windows (Visual C++) to release the current content of the printf buffer. I read somewhere that appending a '\n' would do that. But: I already appended a '\n' and it didn't help. As far as I remember there is a function like flush() or so which has a similar meaning. Could someone help me ? Thank you Peter Tag: templates & optimization Tag: 213628
  - 23
    - Restarting a Windows98 machine from a remote machine Hello Is it possible to reboot a win98 machine triggering from a Remote m/c? On NT/2K, I can create a temporary service and launch it remotely to do this task. But what is the equivalent solution for Win98? Thanks for your help in advance. Thanks & Regards Suchrithaa Tag: templates & optimization Tag: 213624
  - 24
    - createprocess remotely Hi, I am probably missing somthing ... But how can I create a process (execute program) on a remote machine without installing any client on the remote machine, somthing like the sysinternal.com psexec Thanks, Avi Tag: templates & optimization Tag: 213623
  - 25
    - Virtual and physical memory management Hi all, An application I'm writing uses, from time to time, a large amount of memory (up to 1 GB). My computer has 512MB of main memory, so the virtual memory is quite heavily used. I'm watching the memory use using the task manager. I've noticed that even when the memory use has significantly decreased, the VM size is still huge, and it seems as if most of the work is still done using it, even though there's enough room now on the phisical memory. The result is that after the VM is first being used, the CPU usage drops significantly, and this remains until the application exits. My questions are, then: Is it possible that when an application releases some memory it used, it would be released from the physical memory rather than the virtual one? Can the above be managed programaticly, somehow? My application is supposed to running for days, using as much memory is possible; the problem is that when the VM is being used, it becomes unreasonably slow. Any solution will be highly appreciated! I'm using a P2.4/512MB/win2000 machine, with VC6. Eran Tag: templates & optimization Tag: 213620

consider the following template class:

template<bool doit>
class myclass
{
void MyMethod()
{
if(doit)
{
...
}
}
};

myclass<false> m;
m.MyMethod();

Q: Would the optimizer (VC7.0) exclude this function call
since 'doit' is known at compile time and can be resolved?

Regards, DI

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Re: templates & optimization by Alexander

Alexander
Fri Aug 15 10:41:57 CDT 2003

Dead code elimination is known since 16-bit compilers. And the functions
defined inside the class definition are considered inline.

"DanI" <ingallas@bresnan.net> wrote in message
news:062201c362b4$3f1964d0$a301280a@phx.gbl...
> consider the following template class:
>
> template<bool doit>
> class myclass
> {
> void MyMethod()
> {
> if(doit)
> {
> ...
> }
> }
> };
>
> myclass<false> m;
> m.MyMethod();
>
> Q: Would the optimizer (VC7.0) exclude this function call
> since 'doit' is known at compile time and can be resolved?
>
> Regards, DI

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