mysql_table.h

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/* Copyright (c) 2010, 2024, Oracle and/or its affiliates.
 
  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 designed to work 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 either included with
  the program or referenced in the documentation.
 
  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 MYSQL_TABLE_H
#define MYSQL_TABLE_H
 
/**
  @file include/mysql/psi/mysql_table.h
  Instrumentation helpers for table io.
*/
 
#include "mysql/psi/psi_table.h"
 
#if defined(MYSQL_SERVER) || defined(PFS_DIRECT_CALL)
/* PSI_TABLE_CALL() as direct call. */
#include "pfs_table_provider.h"  // IWYU pragma: keep
#endif
 
#ifndef PSI_TABLE_CALL
#define PSI_TABLE_CALL(M) psi_table_service->M
#endif
 
/**
  @defgroup psi_api_table Table Instrumentation (API)
  @ingroup psi_api
  @{
*/
 
/**
  @def MYSQL_TABLE_WAIT_VARIABLES
  Instrumentation helper for table waits.
  This instrumentation declares local variables.
  Do not use a ';' after this macro
  @param LOCKER the locker
  @param STATE the locker state
  @sa MYSQL_START_TABLE_IO_WAIT.
  @sa MYSQL_END_TABLE_IO_WAIT.
  @sa MYSQL_START_TABLE_LOCK_WAIT.
  @sa MYSQL_END_TABLE_LOCK_WAIT.
*/
#ifdef HAVE_PSI_TABLE_INTERFACE
#define MYSQL_TABLE_WAIT_VARIABLES(LOCKER, STATE) \
  struct PSI_table_locker *LOCKER;                \
  PSI_table_locker_state STATE;
#else
#define MYSQL_TABLE_WAIT_VARIABLES(LOCKER, STATE)
#endif
 
/**
  @def MYSQL_START_TABLE_LOCK_WAIT
  Instrumentation helper for table lock waits.
  This instrumentation marks the start of a wait event.
  @param LOCKER the locker
  @param STATE the locker state
  @param PSI the instrumented table
  @param OP the table operation to be performed
  @param FLAGS per table operation flags.
  @sa MYSQL_END_TABLE_LOCK_WAIT.
*/
#ifdef HAVE_PSI_TABLE_INTERFACE
#define MYSQL_START_TABLE_LOCK_WAIT(LOCKER, STATE, PSI, OP, FLAGS)             \
  LOCKER = inline_mysql_start_table_lock_wait(STATE, PSI, OP, FLAGS, __FILE__, \
                                              __LINE__)
#else
#define MYSQL_START_TABLE_LOCK_WAIT(LOCKER, STATE, PSI, OP, FLAGS) \
  do {                                                             \
  } while (0)
#endif
 
/**
  @def MYSQL_END_TABLE_LOCK_WAIT
  Instrumentation helper for table lock waits.
  This instrumentation marks the end of a wait event.
  @param LOCKER the locker
  @sa MYSQL_START_TABLE_LOCK_WAIT.
*/
#ifdef HAVE_PSI_TABLE_INTERFACE
#define MYSQL_END_TABLE_LOCK_WAIT(LOCKER) \
  inline_mysql_end_table_lock_wait(LOCKER)
#else
#define MYSQL_END_TABLE_LOCK_WAIT(LOCKER) \
  do {                                    \
  } while (0)
#endif
 
#ifdef HAVE_PSI_TABLE_INTERFACE
#define MYSQL_UNLOCK_TABLE(T) inline_mysql_unlock_table(T)
#else
#define MYSQL_UNLOCK_TABLE(T) \
  do {                        \
  } while (0)
#endif
 
#ifdef HAVE_PSI_TABLE_INTERFACE
/**
  Instrumentation calls for MYSQL_START_TABLE_LOCK_WAIT.
  @sa MYSQL_END_TABLE_LOCK_WAIT.
*/
static inline struct PSI_table_locker *inline_mysql_start_table_lock_wait(
    PSI_table_locker_state *state, struct PSI_table *psi,
    enum PSI_table_lock_operation op, ulong flags, const char *src_file,
    int src_line) {
  if (psi != nullptr) {
    struct PSI_table_locker *locker;
    locker = PSI_TABLE_CALL(start_table_lock_wait)(state, psi, op, flags,
                                                   src_file, src_line);
    return locker;
  }
  return nullptr;
}
 
/**
  Instrumentation calls for MYSQL_END_TABLE_LOCK_WAIT.
  @sa MYSQL_START_TABLE_LOCK_WAIT.
*/
static inline void inline_mysql_end_table_lock_wait(
    struct PSI_table_locker *locker) {
  if (locker != nullptr) {
    PSI_TABLE_CALL(end_table_lock_wait)(locker);
  }
}
 
static inline void inline_mysql_unlock_table(struct PSI_table *table) {
  if (table != nullptr) {
    PSI_TABLE_CALL(unlock_table)(table);
  }
}
#endif
 
/** @} (end of group psi_api_table) */
 
#endif