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loop speed

Scheduled Pinned Locked Moved C / C++ / MFC
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  • K khan

    #include #include #include bool g_bWorking; void Worker() { while (g_bWorking) { //this is the loop where the program does all the work. printf("ASD"); } } unsigned long __stdcall Thread(void* lpVoid) { Worker(); return 0; } main() { unsigned long id; HANDLE h; g_bWorking = TRUE; h = CreateThread(NULL,0,Thread,0,CREATE_SUSPENDED,&id); SetThreadPriority(h,THREAD_PRIORITY_LOWEST); ResumeThread(h); getch(); SuspendThread(h); getch(); ResumeThread(h); getch(); return 0; } It will start the thread, then on keypress, pause it, then on keypress resume it. You can see the result by running this console application. When you need to stop it, make g_bWorking = false. And by-the-way, are you writing a console app, or a windows app? this is this.

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    locoone
    wrote on last edited by
    #7

    windows app

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    • L locoone

      windows app

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      khan
      wrote on last edited by
      #8

      Please also specify if you are using MFC or Win32. Is it a dialog-based application? And Is the worker() function a member of your class? this is this.

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      • K khan

        Please also specify if you are using MFC or Win32. Is it a dialog-based application? And Is the worker() function a member of your class? this is this.

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        locoone
        wrote on last edited by
        #9

        it is mfc and dialog and the last im not sure what ya mean

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        • L locoone

          it is mfc and dialog and the last im not sure what ya mean

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          khan
          wrote on last edited by
          #10

          I assume this is your worker function: void CMyDlg::Worker() { while (m_bWorking) { //processing here. } } In your header file: HANDLE m_hThread; bool m_bWorking; static DWORD __stdcall Thread(LPVOID lpVoid); In your .cpp file: DWORD __stdcall CMyDlg::Thread(LPVOID lpVoid) { CMyDlg* parent = (CMyDlg*)lpVoid; parent->Worker(); return 0; } void CMyDlg::OnButtonStart()//your button handler function. { m_bWorking = TRUE; m_hThread = CreateThread(NULL,0,Thread,this,CREATE_SUSPENDED,&id); SetThreadPriority(m_hThread,THREAD_PRIORITY_LOWEST); ResumeThread(m_hThread); } void CMyDlg::OnButtonSuspend()//pause it { SuspendThread(m_hThread); } void CMyDlg::OnButtonResume()//resume it { ResumeThread(m_hThread); } void CMyDlg::OnButtonStop()//stop it { m_bWorking = false; } I hope that helps. this is this.

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          • K khan

            I assume this is your worker function: void CMyDlg::Worker() { while (m_bWorking) { //processing here. } } In your header file: HANDLE m_hThread; bool m_bWorking; static DWORD __stdcall Thread(LPVOID lpVoid); In your .cpp file: DWORD __stdcall CMyDlg::Thread(LPVOID lpVoid) { CMyDlg* parent = (CMyDlg*)lpVoid; parent->Worker(); return 0; } void CMyDlg::OnButtonStart()//your button handler function. { m_bWorking = TRUE; m_hThread = CreateThread(NULL,0,Thread,this,CREATE_SUSPENDED,&id); SetThreadPriority(m_hThread,THREAD_PRIORITY_LOWEST); ResumeThread(m_hThread); } void CMyDlg::OnButtonSuspend()//pause it { SuspendThread(m_hThread); } void CMyDlg::OnButtonResume()//resume it { ResumeThread(m_hThread); } void CMyDlg::OnButtonStop()//stop it { m_bWorking = false; } I hope that helps. this is this.

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            locoone
            wrote on last edited by
            #11

            m_hThread = CreateThread(NULL,0,Thread,this,CREATE_SUSPENDED,&id); C:\Program Files\Microsoft Visual Studio\MyProjects\wordlist\wordlistDlg.cpp(230) : error C2065: 'id' : undeclared identifier its about time to give up

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            • L locoone

              m_hThread = CreateThread(NULL,0,Thread,this,CREATE_SUSPENDED,&id); C:\Program Files\Microsoft Visual Studio\MyProjects\wordlist\wordlistDlg.cpp(230) : error C2065: 'id' : undeclared identifier its about time to give up

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              khan
              wrote on last edited by
              #12

              You must have seen in my first post that: unsigned long id; or DWORD id; Please have a look at this MSDN url also: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/createthread.asp[^] this is this.

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              • K khan

                You must have seen in my first post that: unsigned long id; or DWORD id; Please have a look at this MSDN url also: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/createthread.asp[^] this is this.

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                locoone
                wrote on last edited by
                #13

                unsigned long id; or DWORD id; either of them will give another error if i try them and i cant even come close of making since of the web page :mad: just shoot me

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                • L locoone

                  unsigned long id; or DWORD id; either of them will give another error if i try them and i cant even come close of making since of the web page :mad: just shoot me

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                  khan
                  wrote on last edited by
                  #14

                  First thing to do is Be Calm. Read some poetry. Next, declaring a variable does not give errors. Make sure you declare it: DWORD id; before CreateThread() function call. And try Rebuild All from the build menu. If that does not solve the problem, you can post the error that Visual Studio gives. this is this.

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                  • K khan

                    First thing to do is Be Calm. Read some poetry. Next, declaring a variable does not give errors. Make sure you declare it: DWORD id; before CreateThread() function call. And try Rebuild All from the build menu. If that does not solve the problem, you can post the error that Visual Studio gives. this is this.

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                    locoone
                    wrote on last edited by
                    #15

                    C:\Program Files\Microsoft Visual Studio\MyProjects\wordlist\wordlistDlg.cpp(231) : error C2664: 'CreateThread' : cannot convert parameter 3 from 'unsigned long (void *)' to 'unsigned long (__stdcall *)(void *)' None of the functions with this name in scope match the target type DWORD id; m_bWorking = TRUE; m_hThread = CreateThread(NULL,0,Thread,this,CREATE_SUSPENDED,&id); SetThreadPriority(m_hThread,THREAD_PRIORITY_LOWEST); ResumeThread(m_hThread); that was with the build all ps. i am calm lol

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                    • L locoone

                      C:\Program Files\Microsoft Visual Studio\MyProjects\wordlist\wordlistDlg.cpp(231) : error C2664: 'CreateThread' : cannot convert parameter 3 from 'unsigned long (void *)' to 'unsigned long (__stdcall *)(void *)' None of the functions with this name in scope match the target type DWORD id; m_bWorking = TRUE; m_hThread = CreateThread(NULL,0,Thread,this,CREATE_SUSPENDED,&id); SetThreadPriority(m_hThread,THREAD_PRIORITY_LOWEST); ResumeThread(m_hThread); that was with the build all ps. i am calm lol

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                      khan
                      wrote on last edited by
                      #16

                      Did you declare the Thread function in the class? It should be like this: static DWORD __stdcall Thread(LPVOID lpVoid); In the implementation file: DWORD __stdcall CMyDlg::Thread(LPVOID lpVoid) { ... And "CMyDlg" is the name of your dialog class. Change that with the real name. Hope that helps. this is this.

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                      • K khan

                        Did you declare the Thread function in the class? It should be like this: static DWORD __stdcall Thread(LPVOID lpVoid); In the implementation file: DWORD __stdcall CMyDlg::Thread(LPVOID lpVoid) { ... And "CMyDlg" is the name of your dialog class. Change that with the real name. Hope that helps. this is this.

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                        locoone
                        wrote on last edited by
                        #17

                        im so lost now i have no clue

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                        • L locoone

                          im so lost now i have no clue

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                          khan
                          wrote on last edited by
                          #18

                          Note that CMyDlg is the placeholder of your class-name. e.g, if you made a dialog-based app called Hello, then your dialog class-name will be "CHelloDlg". When you declare a function, it means go to the header file (*.h), and write the declaration line there: e.g, in HelloDlg.h: HANDLE m_hThread; bool m_bWorking; static DWORD __stdcall Thread(LPVOID lpVoid); //------------- declaration ends here. Now open the associated .cpp file e.g, HelloDlg.cpp and write the complete functions there: DWORD __stdcall CMyDlg::Thread(LPVOID lpVoid) { ..... blah blah. And be sure to read a good book on Visual C++. this is this.

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                          • K khan

                            Note that CMyDlg is the placeholder of your class-name. e.g, if you made a dialog-based app called Hello, then your dialog class-name will be "CHelloDlg". When you declare a function, it means go to the header file (*.h), and write the declaration line there: e.g, in HelloDlg.h: HANDLE m_hThread; bool m_bWorking; static DWORD __stdcall Thread(LPVOID lpVoid); //------------- declaration ends here. Now open the associated .cpp file e.g, HelloDlg.cpp and write the complete functions there: DWORD __stdcall CMyDlg::Thread(LPVOID lpVoid) { ..... blah blah. And be sure to read a good book on Visual C++. this is this.

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                            locoone
                            wrote on last edited by
                            #19

                            yea i know about the CMyDlg name i got it to not give a error when compilling but when run is a bad error but its 6 am im going to bed will post tomorrow

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                            • K khan

                              I assume this is your worker function: void CMyDlg::Worker() { while (m_bWorking) { //processing here. } } In your header file: HANDLE m_hThread; bool m_bWorking; static DWORD __stdcall Thread(LPVOID lpVoid); In your .cpp file: DWORD __stdcall CMyDlg::Thread(LPVOID lpVoid) { CMyDlg* parent = (CMyDlg*)lpVoid; parent->Worker(); return 0; } void CMyDlg::OnButtonStart()//your button handler function. { m_bWorking = TRUE; m_hThread = CreateThread(NULL,0,Thread,this,CREATE_SUSPENDED,&id); SetThreadPriority(m_hThread,THREAD_PRIORITY_LOWEST); ResumeThread(m_hThread); } void CMyDlg::OnButtonSuspend()//pause it { SuspendThread(m_hThread); } void CMyDlg::OnButtonResume()//resume it { ResumeThread(m_hThread); } void CMyDlg::OnButtonStop()//stop it { m_bWorking = false; } I hope that helps. this is this.

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                              David Crow
                              wrote on last edited by
                              #20

                              khan++ wrote: m_hThread = CreateThread(NULL,0,Thread,this,CREATE_SUSPENDED,&id); Use AfxBeginThread() with MFC applications.


                              "Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

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                              • L locoone

                                im a noob that is russian to me :(

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                                David Crow
                                wrote on last edited by
                                #21

                                See here and here for thread information.


                                "Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

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                                • D David Crow

                                  See here and here for thread information.


                                  "Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

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                                  locoone
                                  wrote on last edited by
                                  #22

                                  i narrowed it down i think. if i leave DWORD id; m_bWorking = TRUE; m_hThread = CreateThread(NULL,0,Thread,this,CREATE_SUSPENDED,&id); SetThreadPriority(m_hThread,THREAD_PRIORITY_LOWEST); ResumeThread(m_hThread); like it is it errors if i //ResumeThread(m_hThread); no error but the program dont run either so im stuck again. error: debug assertion failed file: wincore.cpp line: 890 X| X| X| X|

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                                  • L locoone

                                    i narrowed it down i think. if i leave DWORD id; m_bWorking = TRUE; m_hThread = CreateThread(NULL,0,Thread,this,CREATE_SUSPENDED,&id); SetThreadPriority(m_hThread,THREAD_PRIORITY_LOWEST); ResumeThread(m_hThread); like it is it errors if i //ResumeThread(m_hThread); no error but the program dont run either so im stuck again. error: debug assertion failed file: wincore.cpp line: 890 X| X| X| X|

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                                    David Crow
                                    wrote on last edited by
                                    #23

                                    locoone wrote: m_hThread = CreateThread(NULL,0,Thread,this,CREATE_SUSPENDED,&id); See here.


                                    "Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

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