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) override;
 
  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::position;
  using Storage::read;
  using Storage::write;
 
  IOSize read(void *into, IOSize n) override;
  IOSize write(const void *from, IOSize n) override;
 
  IOOffset position(IOOffset offset, Relative whence = SET) override;
  void resize(IOOffset size) override;
 
  void close(void) override;
  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:
  // functions
 
  void loadLibrary();
  void closeLibrary();
 
  //data
 
  void *m_fd;
  bool m_close;
  std::string m_name;
  void *m_library_handle;
  bool m_is_loaded;
 
  // Prototypes for functions
  // These are data members that are function pointers.
 
  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