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Exemple de code C/C++ : Définition de MaxRunTime

  • Article

Cet exemple montre comment définir la durée d’exécution maximale (en millisecondes) d’une tâche connue. Cet exemple suppose que la tâche et la tâche de test existent déjà sur l’ordinateur local.

#include <windows.h>
#include <initguid.h>
#include <ole2.h>
#include <mstask.h>
#include <msterr.h>
#include <wchar.h>


int main(int argc, char **argv)
{
  HRESULT hr = S_OK;
  
  
  ///////////////////////////////////////////////////////////////////
  // Call CoInitialize to initialize the COM library and then
  // call CoCreateInstance to get the Task Scheduler object.
  ///////////////////////////////////////////////////////////////////
  ITaskScheduler *pITS;
  
  hr = CoInitialize(NULL);
  if (SUCCEEDED(hr))
  {
    hr = CoCreateInstance(CLSID_CTaskScheduler,
                          NULL,
                          CLSCTX_INPROC_SERVER,
                          IID_ITaskScheduler,
                          (void **) &pITS);
    if (FAILED(hr))
    {
      CoUninitialize();
      return 1;
    }
  }
  else
  {
    return 1;
  }
  
  
  ///////////////////////////////////////////////////////////////////
  // Call ITaskScheduler::Activate to get the Task object.
  ///////////////////////////////////////////////////////////////////
  
  ITask *pITask;
  LPCWSTR lpcwszTaskName;
  lpcwszTaskName = L"Test Task";
  hr = pITS->Activate(lpcwszTaskName,
                      IID_ITask,
                      (IUnknown**) &pITask);
  
  // Release the ITaskScheduler interface.
  pITS->Release();  
  
  if (FAILED(hr))
  {
    wprintf(L"Failed calling ITaskScheduler::Activate: ");
    wprintf(L"error = 0x%x\n",hr);
    CoUninitialize();
    return 1;
  }
  
  
  ///////////////////////////////////////////////////////////////////
  // Call ITask::SetMaxRunTime to specify the maximum amount
  // of time the task will run.
  ///////////////////////////////////////////////////////////////////
  DWORD dwMaxRunTime = (1000*60*5);
  
  hr = pITask->SetMaxRunTime(dwMaxRunTime);
  
  if (FAILED(hr))
  {
    wprintf(L"Failed calling ITask::SetMaxRunTime: ");
    wprintf(L"error = 0x%x\n",hr);
    pITask->Release();
    CoUninitialize();
    return 1;
  }
  
  
  ///////////////////////////////////////////////////////////////////
  // Call IPersistFile::Save to save the modified task to disk.
  ///////////////////////////////////////////////////////////////////
  IPersistFile *pIPersistFile;
  
  hr = pITask->QueryInterface(IID_IPersistFile,
                              (void **)&pIPersistFile);
  
  // Release the ITask interface.
  pITask->Release();  
  
  hr = pIPersistFile->Save(NULL,
                           TRUE);

  if (FAILED(hr))
  {
    wprintf(L"Failed calling IPersistFile::Save: ");
    wprintf(L"error = 0x%x\n",hr);
    pIPersistFile->Release();
    CoUninitialize();
    return 1;
  }
  
  // Release the IPersistFile interface.
  pIPersistFile->Release();
  
  wprintf(L"The maximum run time is set to 5 minutes.\n");
  
  CoUninitialize();
  return 0;
}

Exemples de Planificateur de tâches 1.0