Multithreading Multi-Threaded Programming

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WndProc LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { HDC hdc ; PAINTSTRUCT ps ; RECT rect ; switch (message) { case WM_CREATE: PlaySound (TEXT ("hellowin.wav"), NULL, SND_FILENAME | SND_ASYNC) ; return 0 ; case WM_PAINT: hdc = BeginPaint (hwnd, &ps) ; GetClientRect (hwnd, &rect) ; DrawText (hdc, TEXT ("Hello, Windows 98!"), -1, &rect, DT_SINGLELINE | DT_CENTER | DT_VCENTER) ; EndPaint (hwnd, &ps) ; return 0 ; case WM_DESTROY: PostQuitMessage (0) ; return 0 ; } return DefWindowProc (hwnd, message, wParam, lParam) ; } 8 Advanced Windows Network <strong>Programming</strong> 11/11/12
Yielding Control } What would happen if one of your handler functions were a pig and chewed up 10 seconds of CPU time? } It won’t be able to process any messages because DispatchMessage won’t return until the pig returns. } Way around: } yield control once in a while by inserting the following instructions inside the main loop. MSG message; if (::PeekMessage(&message, NULL, 0, 0, PM_REMOVE)) { ::TranslateMessage(&message); ::DispatchMessage(&message); } 9 Advanced Windows Network <strong>Programming</strong> 11/11/12
Page 1 and 2: Multithreading Multi-Threaded Progr
Page 3 and 4: Outline } Windows Message Processin
Page 5 and 6: MSG structure } The system sends a
Page 7: #include #include LRESULT CALLBAC
Page 11 and 12: Writing the Worker Thread Function
Page 13 and 14: Starting the Thread } To start the
Page 15 and 16: The Running Threads } The AfxBeginT
Page 17 and 18: How the Main Thread Talks to a Work
Page 19 and 20: How does the worker thread get the
Page 21 and 22: What kind Msg in the PostMessage do
Page 23 and 24: Tips for Parameters of (WPARAM wPar
Page 25 and 26: Using Events for Thread Synchroniza
Page 27 and 28: Win32 Event HANDLE } CreateEvent fu
Page 29 and 30: WaitForSingleObject function } Wait
Page 31 and 32: WaitForMultipleObjects function } W
Page 33 and 34: Example main thread } Start the thr
Page 35 and 36: Timer in worker thread //the while
Page 37 and 38: Synchronization Classes } The multi
Page 39 and 40: When to Use Which? } Synchronizatio
Page 41 and 42: How to determine which is suitable?
Page 43 and 44: Example of using CCriticalSection }
Page 45 and 46: Example of using CMutex } Mutex is
Page 47 and 48: Example of using CSemaphore - 1 } C
Page 49 and 50: Win32 Semaphore Synchronization Obj
Page 51 and 52: Example of Threads Pool - Thread da
Page 53 and 54: Example of Threads Pool - Stop all
Page 55 and 56: Example of Threads Pool -Thread fun
Page 57 and 58: References } Chapter 11,Windows Mes
Page 59 and 60:
59 Advanced Windows Network Program
Page 61:
Classes not derived from CObject 61
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Multithreading Multi-Threaded Programming

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