Multithreading Multi-Threaded Programming

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Window Procedure } A window procedure is } a function that receives and processes all messages sent to the window. } Every window class has a window procedure, and every window created with that class uses that same window procedure to respond to messages. } The system sends a message to a window procedure by passing the message data as arguments to the procedure. } The window procedure then performs an appropriate action for the message; it checks the message identifier and, while processing the message, uses the information specified by the message parameters. } A window procedure does not usually ignore a message. } If it does not process a message, it must send the message back to the system for default processing. The window procedure does this by calling the DefWindowProc function, which performs a default action and returns a message result. } To identify the specific window affected by the message, a window procedure can examine the window handle passed with a message. } Because a window procedure is shared by all windows belonging to the same class, it can process messages for several different windows. 6 Advanced Windows Network Programming 11/11/12
#include #include LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ; HWND hwnd ; int cxClient, cyClient ; int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow) { static TCHAR szAppName[] = TEXT (”HelloWin") ; MSG msg ; WNDCLASS wndclass ; wndclass.style = CS_HREDRAW | CS_VREDRAW ; wndclass.lpfnWndProc = WndProc ; ... … … … if (!RegisterClass (&wndclass)) { MessageBox (NULL, TEXT ("This program requires Windows NT!"), szAppNam, MB_ICONERROR) ; return 0 ; } hwnd = CreateWindow (szAppName, TEXT (” The Hello Program"),"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL) ; ShowWindow (hwnd, iCmdShow) ; UpdateWindow (hwnd) ; while (GetMessage (&msg, NULL, 0, 0)) { TranslateMessage (&msg) ; } 7 DispatchMessage (&msg) ; } return msg.wParam ; Programming Windows, Fifth Edition - Charles Petzold. 1998 Advanced Windows Network Programming 11/11/12
Page 1 and 2: Multithreading Multi-Threaded Progr
Page 3 and 4: Outline } Windows Message Processin
Page 5: MSG structure } The system sends a
Page 9 and 10: Yielding Control } What would happe
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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