ceph/src/crimson/os/cyanstore/cyan_object.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 #pragma once
   4
   5 #include <cstddef>
   6 #include <map>
   7 #include <string>
   8 #include <boost/intrusive_ptr.hpp>
   9 #include <boost/smart_ptr/intrusive_ref_counter.hpp>
  10
  11 #include "include/buffer.h"
  12
  13 namespace crimson::os {
  14
  15 struct Object : public boost::intrusive_ref_counter<
  16   Object,
  17   boost::thread_unsafe_counter>
  18 {
  19   using bufferlist = ceph::bufferlist;
  20
  21   bufferlist data;
  22   // use transparent comparator for better performance, see
  23   // https://en.cppreference.com/w/cpp/utility/functional/less_void
  24   std::map<std::string,bufferlist,std::less<>> xattr;
  25   bufferlist omap_header;
  26   std::map<std::string,bufferlist> omap;
  27
  28   typedef boost::intrusive_ptr<Object> Ref;
  29
  30   Object() = default;
  31
  32   // interface for object data
  33   size_t get_size() const;
  34   ceph::bufferlist read(uint64_t offset, uint64_t len);
  35   int write(uint64_t offset, const bufferlist &bl);
  36   int clone(Object *src, uint64_t srcoff, uint64_t len,
  37              uint64_t dstoff);
  38   int truncate(uint64_t offset);
  39
  40   void encode(bufferlist& bl) const;
  41   void decode(bufferlist::const_iterator& p);
  42 };
  43 using ObjectRef = boost::intrusive_ptr<Object>;
  44
  45 }