xbmc/filesystem/FileCache.h

   1 /*
   2  *  Copyright (C) 2005-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #pragma once
  10
  11 #include "CacheStrategy.h"
  12 #include "File.h"
  13 #include "IFile.h"
  14 #include "threads/CriticalSection.h"
  15 #include "threads/Thread.h"
  16
  17 #include <atomic>
  18 #include <memory>
  19
  20 namespace XFILE
  21 {
  22
  23   class CFileCache : public IFile, public CThread
  24   {
  25   public:
  26     explicit CFileCache(const unsigned int flags);
  27     ~CFileCache() override;
  28
  29     // CThread methods
  30     void Process() override;
  31     void OnExit() override;
  32     void StopThread(bool bWait = true) override;
  33
  34     // IFIle methods
  35     bool Open(const CURL& url) override;
  36     void Close() override;
  37     bool Exists(const CURL& url) override;
  38     int Stat(const CURL& url, struct __stat64* buffer) override;
  39
  40     ssize_t Read(void* lpBuf, size_t uiBufSize) override;
  41
  42     int64_t Seek(int64_t iFilePosition, int iWhence) override;
  43     int64_t GetPosition() override;
  44     int64_t GetLength() override;
  45
  46     int IoControl(EIoControl request, void* param) override;
  47
  48     IFile *GetFileImp();
  49
  50     const std::string GetProperty(XFILE::FileProperty type, const std::string &name = "") const override;
  51
  52     const std::vector<std::string> GetPropertyValues(XFILE::FileProperty type, const std::string& name = "") const override
  53     {
  54       return std::vector<std::string>();
  55     }
  56
  57   private:
  58     std::unique_ptr<CCacheStrategy> m_pCache;
  59     int m_seekPossible;
  60     CFile m_source;
  61     std::string m_sourcePath;
  62     CEvent m_seekEvent;
  63     CEvent m_seekEnded;
  64     int64_t m_nSeekResult;
  65     int64_t m_seekPos;
  66     int64_t m_readPos;
  67     int64_t m_writePos;
  68     unsigned m_chunkSize;
  69     uint32_t m_writeRate;
  70     uint32_t m_writeRateActual;
  71     uint32_t m_writeRateLowSpeed;
  72     int64_t m_forwardCacheSize;
  73     bool m_bFilling;
  74     std::atomic<int64_t> m_fileSize;
  75     unsigned int m_flags;
  76     CCriticalSection m_sync;
  77   };
  78
  79 }