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VC++中不占CPU的延时方法:
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | int CtestThreadDlg::DelayTime( int m) //参数为延时秒数 { HANDLE hTimer = NULL; HANDLE hT[2]; LARGE_INTEGER liDueTime; liDueTime.QuadPart = m *(-100000000) / 10; hTimer = CreateWaitableTimer(NULL, TRUE, _T( "theTimer" )); hT[0] = hTimer; if (!hTimer) { return 1; } if (!SetWaitableTimer(hTimer, &liDueTime, 0, NULL, NULL, FALSE)) { CloseHandle(hTimer); return 2; } DWORD lBusy; do { lBusy = MsgWaitForMultipleObjects(1, hT, FALSE, 0xffff, QS_ALLINPUT); const MSG msg; GetMessage((LPMSG) &msg, NULL, 0, 0); DispatchMessage(&msg); } while (lBusy == (WAIT_OBJECT_0 + 1)); CloseHandle(hTimer); return 0; } |