2016-07-15: Window定時器使用

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windows下定時器使用執行個體

#include <iostream>#include <Windows.h>using namespace std;void TimerDemo(){    int count = 0;    // Iteration counter    HANDLE hTimer = NULL;    // WaitableTimer handle    hTimer = CreateWaitableTimer(    // Create waitable timer        NULL,        FALSE,    // Autoreset --> timer restarts counting after event fired        NULL);    SYSTEMTIME time;        // System time structure    GetSystemTime(&time);    // Curren time    time.wSecond += 3;        // Wait 3 sec    FILETIME ftime;    // File time (expected by SetWaitableTimer)    SystemTimeToFileTime(&time, &ftime);    // Convert system to file time    if(!SetWaitableTimer(    // Set waitable timer        hTimer,    // Timer handle        reinterpret_cast<LARGE_INTEGER*>(&ftime),    // Convert file time to large integer        200,    // Period time, fire again after 200ms        NULL,         NULL,        0))    {        cout << "SetWaitableTimer failed" <<  GetLastError() << endl;    };    cout << "Start Time " << GetTickCount() << endl;    while(WaitForSingleObject(hTimer, 5000) == WAIT_OBJECT_0){    // Wait for timer event        cout << "CALLED " << ++count << endl;        if(count+1 > 50){    // Exit after 5 events            break;        }    }    cout << "End Time " << GetTickCount() << endl;    CancelWaitableTimer(hTimer);    // Stop timer    CloseHandle(hTimer);            // Delete handle}

2016-07-15: Window定時器使用