/*****************************************************************************

Copyright (c) 1996, 2018, 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.

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limited to OpenSSL) that is licensed under separate terms, as designated in a
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your derivative works with the separately licensed software that they have
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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.

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*****************************************************************************/

/** @file include/dict0boot.ic
 Data dictionary creation and booting

 Created 4/18/1996 Heikki Tuuri
 *******************************************************/

/** Returns a new row id.
 @return the new id */
UNIV_INLINE
row_id_t dict_sys_get_new_row_id(void) {
  row_id_t id;

  mutex_enter(&dict_sys->mutex);

  id = dict_sys->row_id;

  if (0 == (id % DICT_HDR_ROW_ID_WRITE_MARGIN)) {
    dict_hdr_flush_row_id();
  }

  dict_sys->row_id++;

  mutex_exit(&dict_sys->mutex);

  return (id);
}

/** Reads a row id from a record or other 6-byte stored form.
 @return row id */
UNIV_INLINE
row_id_t dict_sys_read_row_id(const byte *field) /*!< in: record field */
{
#if DATA_ROW_ID_LEN != 6
#error "DATA_ROW_ID_LEN != 6"
#endif

  return (mach_read_from_6(field));
}

/** Writes a row id to a record or other 6-byte stored form. */
UNIV_INLINE
void dict_sys_write_row_id(byte *field,     /*!< in: record field */
                           row_id_t row_id) /*!< in: row id */
{
#if DATA_ROW_ID_LEN != 6
#error "DATA_ROW_ID_LEN != 6"
#endif

  mach_write_to_6(field, row_id);
}

/** Check if a table id belongs to old innodb internal system table.
@param[in]	id		table id
@return true if the table id belongs to a system table. */
UNIV_INLINE
bool dict_is_old_sys_table(table_id_t id) {
  if (srv_is_upgrade_mode) {
    return (id < DICT_HDR_FIRST_ID);
  }
  return (false);
}