多线程—windows

#include "windows.h" #include "math.h" #include "process.h" #define REP 1000000 #define STATUS_READY 0 #define STATUS_WORKING 1 #define STATUS_DONE 2 #define WM_CALC_DONE (WM_USER+0) #define WM_CALC_ABORTED (WM_USER+1) typedef struct { HWND hwnd; BOOL bContinue; } PARAMS,*PPARAMS; LRESULT APIENTRY WndProc(HWND,UINT,WPARAM,LPARAM); int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance, PSTR szCmdLine,int iCmdShow) { static TCHAR szAppName[]=TEXT("超级测试！"); HWND hwnd; MSG msg; WNDCLASS wndclass; wndclass.style=CS_HREDRAW|CS_VREDRAW; wndclass.lpfnWndProc=WndProc; wndclass.cbClsExtra=0; wndclass.cbWndExtra=0; wndclass.hInstance=hInstance; wndclass.hIcon=LoadIcon(NULL,IDI_APPLICATION); wndclass.hCursor=LoadCursor(NULL,IDC_ARROW); wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH); wndclass.lpszMenuName=NULL; wndclass.lpszClassName=szAppName; if(!RegisterClass(&wndclass)) { MessageBox(NULL,TEXT("此程序需要NT!"),szAppName,MB_ICONERROR); return 0; } hwnd=CreateWindow(szAppName,TEXT("多线程的测试"),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); DispatchMessage(&msg); } return msg.wParam; } void mThread(PVOID pvoid) { double A=1.0; int i; long lTime; volatile PPARAMS pparams; pparams=(PPARAMS)pvoid; lTime=GetCurrentTime(); for(i=0;i<REP&&pparams->bContinue;i++) A=tan(atan(exp(log(sqrt(A*A)))))+1.0; if(i==REP) { lTime=GetCurrentTime()-lTime; SendMessage(pparams->hwnd,WM_CALC_DONE,0,lTime); } else SendMessage(pparams->hwnd,WM_CALC_ABORTED,0,0); _endthread(); } LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam) { static int iStatus; static long lTime; static PARAMS params; static TCHAR* szMessage[]={TEXT("好了，鼠标左键开始"), TEXT("正在计算，稍侯..."), TEXT("%d 次计算花费 %ld 毫秒")}; HDC hdc; PAINTSTRUCT ps; RECT rect; TCHAR szBuffer[64]; switch(message) { case WM_LBUTTONDOWN: if(iStatus==STATUS_WORKING) { MessageBeep(0); return 0; } iStatus=STATUS_WORKING; params.hwnd=hwnd; params.bContinue=TRUE; _beginthread(mThread,0,&params); InvalidateRect(hwnd,NULL,TRUE); return 0; case WM_RBUTTONDOWN: params.bContinue=TRUE; return 0; case WM_CALC_DONE: lTime=lParam; iStatus=STATUS_DONE; InvalidateRect(hwnd,NULL,TRUE); return 0; case WM_CALC_ABORTED: iStatus=STATUS_READY; InvalidateRect(hwnd,NULL,TRUE); return 0; case WM_PAINT: hdc=BeginPaint(hwnd,&ps); GetClientRect(hwnd,&rect); wsprintf(szBuffer,szMessage[iStatus],REP,lTime); DrawText(hdc,szBuffer,-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); }