/*
   Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
*/

#ifndef HA_NDB_INDEX_STAT_H
#define HA_NDB_INDEX_STAT_H

#include "ndb_component.h"

/* for NdbIndexScanOperation::IndexBound */
#include <ndbapi/NdbIndexScanOperation.hpp>

/* forward declarations */
struct st_key_range;
typedef struct st_key_range key_range;
struct st_key;
typedef struct st_key KEY;

class Ndb_index_stat_thread : public Ndb_component
{
  // Someone is waiting for stats
  bool client_waiting;
  pthread_mutex_t LOCK_client_waiting;
  pthread_cond_t COND_client_waiting;
public:
  Ndb_index_stat_thread();
  virtual ~Ndb_index_stat_thread();

  /*
    protect stats entry lists where needed
    protect and signal changes in stats entries
  */
  pthread_mutex_t stat_mutex;
  pthread_cond_t stat_cond;

  // Wake thread up to fetch stats or do other stuff
  void wakeup();

  /* are we setup */
  bool is_setup_complete();
private:
  virtual int do_init() { return 0;}
  virtual void do_run();
  virtual int do_deinit() { return 0;}
  // Wakeup for stop
  virtual void do_wakeup();

};

/* free entries from share or at end */
void ndb_index_stat_free(NDB_SHARE*, int iudex_id, int index_version);
void ndb_index_stat_free(NDB_SHARE*);
void ndb_index_stat_end();

void
compute_index_bounds(NdbIndexScanOperation::IndexBound & bound,
                     const KEY *key_info,
                     const key_range *start_key, const key_range *end_key,
                     int from);

#endif
