File_View.h

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#ifndef joedb_File_View_declared
#define joedb_File_View_declared
 
#include "joedb/journal/Buffered_File.h"
 
namespace joedb
{
 /// @ingroup journal
 class File_View: public Buffered_File
 {
  private:
   Abstract_File &file;
 
  public:
   File_View(Buffered_File &file): Buffered_File(file.get_mode()), file(file)
   {
   }
 
   int64_t get_size() const override
   {
    return file.get_size();
   }
 
   size_t pread(char *data, size_t size, int64_t offset) const override
   {
    return file.pread(data, size, offset);
   }
 
   void pwrite(const char *data, size_t size, int64_t offset) override
   {
    return file.pwrite(data, size, offset);
   }
 
   void sync() override
   {
    file.sync();
   }
 
   void datasync() override
   {
    file.datasync();
   }
 
   void shared_lock(int64_t start, int64_t size) override
   {
    file.shared_lock(start, size);
   }
 
   void exclusive_lock(int64_t start, int64_t size) override
   {
    file.exclusive_lock(start, size);
   }
 
   void unlock(int64_t start, int64_t size) noexcept override
   {
    file.unlock(start, size);
   }
 };
}
 
#endif