/* Copyright (c) 2008, 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 as published by
  the Free Software Foundation; version 2 of the License.

  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 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,
  51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */

#ifndef PFS_H
#define PFS_H

/**
  @file storage/perfschema/pfs.h
  Performance schema instrumentation (declarations).
*/

#define HAVE_PSI_1

#include <my_global.h>
#include <my_thread.h>
#include <my_thread_local.h>
#include <mysql/psi/psi.h>

/**
  Entry point to the performance schema implementation.
  This singleton is used to discover the performance schema services.
*/
extern struct PSI_bootstrap PFS_bootstrap;
/** Performance schema Thread Local Storage key.  */
extern thread_local_key_t THR_PFS;
extern thread_local_key_t THR_PFS_VG;  // global_variables
extern thread_local_key_t THR_PFS_SV;  // session_variables
extern thread_local_key_t THR_PFS_VBT; // variables_by_thread
extern thread_local_key_t THR_PFS_SG;  // global_status
extern thread_local_key_t THR_PFS_SS;  // session_status
extern thread_local_key_t THR_PFS_SBT; // status_by_thread
extern thread_local_key_t THR_PFS_SBU; // status_by_user
extern thread_local_key_t THR_PFS_SBA; // status_by_host
extern thread_local_key_t THR_PFS_SBH; // status_by_account

/** True when @c THR_PFS and all other Performance Schema TLS keys are initialized. */
extern bool THR_PFS_initialized;

#define PSI_VOLATILITY_UNKNOWN 0
#define PSI_VOLATILITY_SESSION 1

#define PSI_COUNT_VOLATILITY 2

#endif