CMSSW_4_4_3_patch1/src/Utilities/LStoreAdaptor/interface/LStoreFile.h

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#ifndef LSTORE_ADAPTOR_LSTORE_FILE_H
# define LSTORE_ADAPTOR_LSTORE_FILE_H

# include "Utilities/StorageFactory/interface/Storage.h"
# include "Utilities/StorageFactory/interface/IOFlags.h"
# include <string>
#include <pthread.h>
class LStoreFile : public Storage
{
public:
  LStoreFile (void);
  LStoreFile (void * fd);
  LStoreFile (const char *name, int flags = IOFlags::OpenRead, int perms = 0666);
  LStoreFile (const std::string &name, int flags = IOFlags::OpenRead, int perms = 0666);
  ~LStoreFile (void);

  virtual void  create (const char *name,
                        bool exclusive = false,
                        int perms = 0666);
  virtual void  create (const std::string &name,
                        bool exclusive = false,
                        int perms = 0666);
  virtual void  open (const char *name,
                      int flags = IOFlags::OpenRead,
                      int perms = 0666);
  virtual void  open (const std::string &name,
                      int flags = IOFlags::OpenRead,
                      int perms = 0666);

  using Storage::read;
  using Storage::write;
  using Storage::position;

  virtual IOSize        read (void *into, IOSize n);
  virtual IOSize        write (const void *from, IOSize n);

  virtual IOOffset      position (IOOffset offset, Relative whence = SET);
  virtual void          resize (IOOffset size);

  virtual void          close (void);
  virtual void          abort (void);
  
  class MutexWrapper {
        public:
          MutexWrapper( pthread_mutex_t * lock );
          ~MutexWrapper();
          pthread_mutex_t * m_lock;
  };

  static pthread_mutex_t m_dlopen_lock;

private:
  void *                m_fd;
  bool                  m_close;
  std::string           m_name;
  void loadLibrary();
  void closeLibrary();
  void * m_library_handle;
  bool m_is_loaded;

  // Prototypes for 

  int32_t (*redd_init)();
  int64_t (*redd_read)(void *, char*, int64_t); 
  int32_t (*redd_close)(void *);
  int64_t (*redd_lseek)(void *, int64_t, uint32_t);
  void * (*redd_open)(const char *, int32_t, int32_t );
  int64_t (*redd_write)(void *, const char *, int64_t);
  int32_t (*redd_term)();
  int32_t (*redd_errno)();
  const std::string & (*redd_strerror)();
};

#endif // LSTORE_ADAPTOR_LSTORE_FILE_H