Last updated: 19. 1.1998, 22:26
<*/NOWARN:F*> MODULE BigJob1; (*------------------------------------------ BIGJOB1.C --- Multithreading Demo (c) Charles Petzold, 1996 BigJob1.mod --- Translation to Stony Brook Modula-2 (c) Peter Stadler, 1997 ------------------------------------------*) IMPORT WINUSER; IMPORT WIN32; IMPORT WINX; IMPORT WINGDI; IMPORT SYSTEM; IMPORT ElapsedTime; IMPORT RealMath; CONST REP =100000; CONST STATUS_READY =0; CONST STATUS_WORKING =1; CONST STATUS_DONE =2; CONST WM_CALC_DONE =(WINUSER.WM_USER + 0); CONST WM_CALC_ABORTED =(WINUSER.WM_USER + 1); TYPE PARAMS = RECORD hwnd : WIN32.HWND; bContinue : BOOLEAN; END; PPARAMS = POINTER TO PARAMS; TYPE Line = ARRAY[0..50] OF CHAR; MsgArray = ARRAY[0..2] OF Line; CONST szAppName = "BigJob1"; VAR szMessage : MsgArray; lTime : WIN32.LONG; VAR hwnd : WIN32.HWND; msg : WINUSER.MSG; wc : WINUSER.WNDCLASSEX; iStatus : INTEGER; params : PARAMS; (* MessageThread : Threads.Thread; *) (*+++******************************************************************) PROCEDURE Thread (pvoid : WIN32.PVOID): WIN32.DWORD [EXPORT]; (**********************************************************************) VAR A : LONGREAL; i : INTEGER; lTime2 : WIN32.LONG; pparams : PPARAMS; ok : BOOLEAN; code : WIN32.DWORD; lTime1 : WIN32.LONG; BEGIN A := 1.0; pparams := SYSTEM.CAST(PPARAMS,pvoid); lTime1 := ElapsedTime.GetTime (); i := 0; LOOP IF(i=REP) THEN EXIT; END; END; IF (i = REP) THEN lTime2 := ElapsedTime.GetTime (); lTime1 := SYSTEM.CAST(CARDINAL,(SYSTEM.CAST(INTEGER,lTime2) - SYSTEM.CAST(INTEGER,lTime1))); WINUSER.SendMessage (pparams^.hwnd, WM_CALC_DONE, 0, lTime1); ELSE WINUSER.SendMessage (pparams^.hwnd, WM_CALC_ABORTED, 0, 0); END; WIN32.ExitThread(code); (* ok := Threads.KillThread(MessageThread,code); *) IF(ok) THEN RETURN 0; END; END Thread; <*/PUSH*> %IF WIN32 %THEN <*/CALLS:WIN32SYSTEM*> %ELSE <*/CALLS:WINSYSTEM*> %END (*++++*****************************************************************) PROCEDURE WndProc(hwnd : WIN32.HWND; (**********************************************************************) iMsg : WIN32.UINT; wParam : WIN32.WPARAM; lParam : WIN32.LPARAM) : WIN32.LRESULT [EXPORT]; VAR szBuffer : ARRAY[0..63] OF CHAR; hdc : WIN32.HDC; ps : WINUSER.PAINTSTRUCT; rect : WIN32.RECT; threadHandle : WIN32.HANDLE; tid : CARDINAL; BEGIN CASE (iMsg) OF | WINUSER.WM_LBUTTONDOWN : IF (iStatus = STATUS_WORKING) THEN WINUSER.MessageBeep (0); RETURN 0; END; iStatus := STATUS_WORKING; params.hwnd := hwnd; params.bContinue := TRUE; threadHandle := WIN32.CreateThread(WINX.NIL_SECURITY_ATTRIBUTES,100000,SYSTEM.CAST(WIN32.LPTHREAD_START_ROUTINE,Thread), SYSTEM.ADR(params),WIN32.CREATE_SUSPENDED,tid); (* tHandle := WIN32.CreateThread(NIL_SECURITY_ATTRIBUTES, stackSize, MyThread, T, CREATE_SUSPENDED, tid); *) (* Threads.CreateThread(MessageThread, Thread, SYSTEM.ADR(params), 8192, TRUE); *) WINUSER.InvalidateRect (hwnd, WINX.NIL_RECT, TRUE); RETURN 0; | WINUSER.WM_RBUTTONDOWN : params.bContinue := FALSE; RETURN 0; | WM_CALC_DONE : lTime := lParam; iStatus := STATUS_DONE; WINUSER.InvalidateRect (hwnd, WINX.NIL_RECT, TRUE); RETURN 0; | WM_CALC_ABORTED : iStatus := STATUS_READY; WINUSER.InvalidateRect (hwnd, WINX.NIL_RECT, TRUE); RETURN 0; | WINUSER.WM_PAINT : hdc := WINUSER.BeginPaint (hwnd, ps); WINUSER.GetClientRect (hwnd, rect); (* WINUSER.wsprintf (szBuffer, szMessage[iStatus], REP, lTime); *) WINUSER.wsprintf (szBuffer, szMessage[iStatus],lTime, REP); WINUSER.DrawText (hdc, szBuffer, -1, rect, WINUSER.DT_SINGLELINE BOR WINUSER.DT_CENTER BOR WINUSER.DT_VCENTER); WINUSER.EndPaint (hwnd, ps); RETURN 0; | WINUSER.WM_DESTROY : WINUSER.PostQuitMessage (0); RETURN 0; ELSE RETURN WINUSER.DefWindowProc (hwnd, iMsg, wParam, lParam); END; END WndProc; <*/POP*> (*++++*****************************************************************) PROCEDURE InitApplication () : BOOLEAN; (**********************************************************************) VAR rc : CARDINAL; BEGIN wc.cbSize := SIZE(wc); wc.style := WINUSER.CS_HREDRAW BOR WINUSER.CS_VREDRAW; wc.lpfnWndProc := WndProc; wc.cbClsExtra := 0; wc.cbWndExtra := 0; wc.hInstance := WINX.Instance; wc.hIcon := WINUSER.LoadIcon (NIL, WINUSER.IDI_APPLICATION^); wc.hCursor := WINUSER.LoadCursor (NIL, WINUSER.IDC_ARROW^); wc.hbrBackground := SYSTEM.CAST(WIN32.HBRUSH, WINGDI.GetStockObject (WINGDI.WHITE_BRUSH)); wc.lpszMenuName := NIL; wc.lpszClassName := SYSTEM.ADR(szAppName); wc.hIconSm := WINUSER.LoadIcon (NIL,WINUSER.IDI_APPLICATION^); rc := WINUSER.RegisterClassEx(wc); RETURN rc#0; END InitApplication; (*++++*****************************************************************) PROCEDURE InitMainWindow () : BOOLEAN; (**********************************************************************) BEGIN hwnd := WINUSER.CreateWindow ( szAppName, (* window class name *) "Multithreading Demo: Translation to Stony Brook Modula-2", (* window caption *) WINUSER.WS_OVERLAPPEDWINDOW, (* window style *) WINUSER.CW_USEDEFAULT, (* initial x position *) WINUSER.CW_USEDEFAULT, (* initial y position *) WINUSER.CW_USEDEFAULT, (* initial x size *) WINUSER.CW_USEDEFAULT, (* initial y size *) NIL, (* parent window handle *) NIL, (* window menu handle *) wc.hInstance, (* program instance handle *) NIL); (* creation parameters *) IF hwnd = NIL THEN RETURN FALSE; END; WINUSER.ShowWindow (hwnd, WINUSER.SW_SHOWDEFAULT); WINUSER.UpdateWindow (hwnd); RETURN TRUE; END InitMainWindow; BEGIN szMessage[0] := "Ready (left mouse button begins)"; szMessage[1] := "Working (right mouse button aborts)"; szMessage[2] := "%d msec for %d repetitions"; IF InitApplication() AND InitMainWindow() THEN WHILE (WINUSER.GetMessage(msg,NIL,0,0)) DO WINUSER.TranslateMessage(msg); WINUSER.DispatchMessage(msg); END; END; END BigJob1.