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Filename : mysql_mdl.h
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/* Copyright (c) 2012, 2015, 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 MYSQL_MDL_H
#define MYSQL_MDL_H

/**
  @file mysql/psi/mysql_mdl.h
  Instrumentation helpers for metadata locks.
*/

#include "mysql/psi/psi.h"

#ifndef PSI_METADATA_CALL
#define PSI_METADATA_CALL(M) PSI_DYNAMIC_CALL(M)
#endif

/**
  @defgroup Thread_instrumentation Metadata Instrumentation
  @ingroup Instrumentation_interface
  @{
*/

/**
  @def mysql_mdl_create(K, M, A)
  Instrumented metadata lock creation.
  @param I Metadata lock identity
  @param K Metadata key
  @param T Metadata lock type
  @param D Metadata lock duration
  @param S Metadata lock status
  @param F request source file
  @param L request source line
*/

#ifdef HAVE_PSI_METADATA_INTERFACE
  #define mysql_mdl_create(I, K, T, D, S, F, L) \
    inline_mysql_mdl_create(I, K, T, D, S, F, L)
#else
  #define mysql_mdl_create(I, K, T, D, S, F, L) NULL
#endif

#ifdef HAVE_PSI_METADATA_INTERFACE
  #define mysql_mdl_set_status(L, S) \
    inline_mysql_mdl_set_status(L, S)
#else
  #define mysql_mdl_set_status(L, S) \
    do {} while (0)
#endif


/**
  @def mysql_mdl_destroy(M)
  Instrumented metadata lock destruction.
  @param M Metadata lock
*/
#ifdef HAVE_PSI_METADATA_INTERFACE
  #define mysql_mdl_destroy(M) \
    inline_mysql_mdl_destroy(M, __FILE__, __LINE__)
#else
  #define mysql_mdl_destroy(M) \
    do {} while (0)
#endif

#ifdef HAVE_PSI_METADATA_INTERFACE

static inline PSI_metadata_lock *
inline_mysql_mdl_create(void *identity,
                        const MDL_key *mdl_key,
                        enum_mdl_type mdl_type,
                        enum_mdl_duration mdl_duration,
                        MDL_ticket::enum_psi_status mdl_status,
                        const char *src_file, uint src_line)
{
  PSI_metadata_lock *result;

  /* static_cast: Fit a round C++ enum peg into a square C int hole ... */
  result= PSI_METADATA_CALL(create_metadata_lock)
    (identity,
     mdl_key,
     static_cast<opaque_mdl_type> (mdl_type),
     static_cast<opaque_mdl_duration> (mdl_duration),
     static_cast<opaque_mdl_status> (mdl_status),
     src_file, src_line);

  return result;
}

static inline void inline_mysql_mdl_set_status(
  PSI_metadata_lock *psi,
  MDL_ticket::enum_psi_status mdl_status)
{
  if (psi != NULL)
    PSI_METADATA_CALL(set_metadata_lock_status)(psi, mdl_status);
}

static inline void inline_mysql_mdl_destroy(
  PSI_metadata_lock *psi,
  const char *src_file, uint src_line)
{
  if (psi != NULL)
    PSI_METADATA_CALL(destroy_metadata_lock)(psi);
}
#endif /* HAVE_PSI_METADATA_INTERFACE */

/** @} (end of group Metadata_instrumentation) */

#endif