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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef CEPH_CACHE_OBJECT_CACHE_FILE_H
#define CEPH_CACHE_OBJECT_CACHE_FILE_H
#include "include/Context.h"
#include "include/buffer_fwd.h"
#include "common/ceph_context.h"
#include <string>
namespace ceph {
namespace immutable_obj_cache {
class ObjectCacheFile {
public:
ObjectCacheFile(CephContext *cct, const std::string &name);
~ObjectCacheFile();
// TODO use IO queue instead of individual commands so operations can be
// submitted in batch
// TODO use scatter/gather API
int create();
int open_file();
void read(uint64_t offset, uint64_t length, ceph::bufferlist *bl, Context *on_finish);
void write(uint64_t offset, ceph::bufferlist &&bl, bool fdatasync, Context *on_finish);
int write_object_to_file(ceph::bufferlist read_buf, uint64_t object_len);
int read_object_from_file(ceph::bufferlist* read_buf, uint64_t object_off, uint64_t object_len);
uint64_t get_file_size();
private:
CephContext *cct;
std::string m_name;
int m_fd;
};
} // namespace immutable_obj_cache
} // namespace cache
#endif // CEPH_CACHE_OBJECT_CACHE_FILE_H
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