qSlicerStartupFilePrefetcher.h

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/*==============================================================================
 
  Program: 3D Slicer
 
  Copyright (c) Kitware Inc.
 
  See COPYRIGHT.txt
  or http://www.slicer.org/copyright/copyright.txt for details.
 
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
 
==============================================================================*/
 
#ifndef __qSlicerStartupFilePrefetcher_h
#define __qSlicerStartupFilePrefetcher_h
 
// Qt includes
#include <QString>
#include <QStringList>
 
#include "qSlicerBaseQTAppExport.h"

class Q_SLICER_BASE_QTAPP_EXPORT qSlicerStartupFilePrefetcher
{
public:
  struct Report
  {
    bool Enabled = false;

    QString ApplicationName;
    QString ApplicationHome;
    QString CacheFilePath;

    int InitiallyLoadedLibraryCount = 0;

    int ListedLibraryCount = 0;
    int AlreadyLoadedLibraryCount = 0;
    int SystemLibraryCount = 0;
    int QueuedLibraryCount = 0;

    int WorkerCount = 0;

    int PrefetchedLibraryCount = 0;
    int FailedLibraryCount = 0;
    qint64 PrefetchedByteCount = 0;

    int StartupLibraryCount = 0;
    int PredictedLibraryCount = 0;
    int RecordedLibraryCount = 0;

    double WorkersStartedTimeMs = -1.0;
    double WorkersFinishedTimeMs = -1.0;
    double FinishStartTimeMs = -1.0;
    double FinishEndTimeMs = -1.0;

    QStringList Notes;
  };

  static void start();

  static void finish();

  static Report report();

  static QStringList reportLines();

  static QString cacheFilePath();

  static QStringList loadedLibraryPaths();
 
private:
  qSlicerStartupFilePrefetcher() = delete;
  ~qSlicerStartupFilePrefetcher() = delete;
};
 
#endif