// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab

#ifndef CEPH_RGW_GC_H
#define CEPH_RGW_GC_H


#include "include/types.h"
#include "include/rados/librados.hpp"
#include "common/Mutex.h"
#include "common/Cond.h"
#include "common/Thread.h"
#include "rgw_common.h"
#include "rgw_rados.h"
#include "cls/rgw/cls_rgw_types.h"

#include <atomic>

class RGWGC {
  CephContext *cct;
  RGWRados *store;
  int max_objs;
  string *obj_names;
  std::atomic<bool> down_flag = { false };

  int tag_index(const string& tag);

  class GCWorker : public Thread {
    CephContext *cct;
    RGWGC *gc;
    Mutex lock;
    Cond cond;

  public:
    GCWorker(CephContext *_cct, RGWGC *_gc) : cct(_cct), gc(_gc), lock("GCWorker") {}
    void *entry() override;
    void stop();
  };

  GCWorker *worker;
public:
  RGWGC() : cct(NULL), store(NULL), max_objs(0), obj_names(NULL), worker(NULL) {}
  ~RGWGC() {
    stop_processor();
    finalize();
  }

  void add_chain(librados::ObjectWriteOperation& op, cls_rgw_obj_chain& chain, const string& tag);
  int send_chain(cls_rgw_obj_chain& chain, const string& tag, bool sync);
  int defer_chain(const string& tag, bool sync);
  int remove(int index, const std::list<string>& tags);

  void initialize(CephContext *_cct, RGWRados *_store);
  void finalize();

  int list(int *index, string& marker, uint32_t max, bool expired_only, std::list<cls_rgw_gc_obj_info>& result, bool *truncated);
  void list_init(int *index) { *index = 0; }
  int process(int index, int process_max_secs);
  int process();

  bool going_down();
  void start_processor();
  void stop_processor();
};


#endif