mysql5/mysql-5.7.27/storage/perfschema/table_all_instr.cc

/* Copyright (c) 2008, 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 */

/**
  @file storage/perfschema/table_all_instr.cc
  Abstract tables for all instruments (implementation).
*/

#include "my_global.h"
#include "my_thread.h"
#include "table_all_instr.h"
#include "pfs_global.h"
#include "pfs_buffer_container.h"

ha_rows
table_all_instr::get_row_count(void)
{
  return global_mutex_container.get_row_count()
    + global_rwlock_container.get_row_count()
    + global_cond_container.get_row_count()
    + global_file_container.get_row_count()
    + global_socket_container.get_row_count() ;
}

table_all_instr::table_all_instr(const PFS_engine_table_share *share)
  : PFS_engine_table(share, &m_pos),
    m_pos(), m_next_pos()
{}

void table_all_instr::reset_position(void)
{
  m_pos.reset();
  m_next_pos.reset();
}

int table_all_instr::rnd_next(void)
{
  PFS_mutex *mutex;
  PFS_rwlock *rwlock;
  PFS_cond *cond;
  PFS_file *file;
  PFS_socket *socket;

  for (m_pos.set_at(&m_next_pos);
       m_pos.has_more_view();
       m_pos.next_view())
  {
    switch (m_pos.m_index_1) {
    case pos_all_instr::VIEW_MUTEX:
      {
        PFS_mutex_iterator it= global_mutex_container.iterate(m_pos.m_index_2);
        mutex= it.scan_next(& m_pos.m_index_2);
        if (mutex != NULL)
        {
          make_mutex_row(mutex);
          m_next_pos.set_after(&m_pos);
          return 0;
        }
      }
      break;
    case pos_all_instr::VIEW_RWLOCK:
      {
        PFS_rwlock_iterator it= global_rwlock_container.iterate(m_pos.m_index_2);
        rwlock= it.scan_next(& m_pos.m_index_2);
        if (rwlock != NULL)
        {
          make_rwlock_row(rwlock);
          m_next_pos.set_after(&m_pos);
          return 0;
        }
      }
      break;
    case pos_all_instr::VIEW_COND:
      {
        PFS_cond_iterator it= global_cond_container.iterate(m_pos.m_index_2);
        cond= it.scan_next(& m_pos.m_index_2);
        if (cond != NULL)
        {
          make_cond_row(cond);
          m_next_pos.set_after(&m_pos);
          return 0;
        }
      }
      break;
    case pos_all_instr::VIEW_FILE:
      {
        PFS_file_iterator it= global_file_container.iterate(m_pos.m_index_2);
        file= it.scan_next(& m_pos.m_index_2);
        if (file != NULL)
        {
          make_file_row(file);
          m_next_pos.set_after(&m_pos);
          return 0;
        }
      }
      break;
    case pos_all_instr::VIEW_SOCKET:
      {
        PFS_socket_iterator it= global_socket_container.iterate(m_pos.m_index_2);
        socket= it.scan_next(& m_pos.m_index_2);
        if (socket != NULL)
        {
          make_socket_row(socket);
          m_next_pos.set_after(&m_pos);
          return 0;
        }
      }
      break;
    }
  }

  return HA_ERR_END_OF_FILE;
}

int table_all_instr::rnd_pos(const void *pos)
{
  PFS_mutex *mutex;
  PFS_rwlock *rwlock;
  PFS_cond *cond;
  PFS_file *file;
  PFS_socket *socket;

  set_position(pos);

  switch (m_pos.m_index_1) {
  case pos_all_instr::VIEW_MUTEX:
    mutex= global_mutex_container.get(m_pos.m_index_2);
    if (mutex != NULL)
    {
      make_mutex_row(mutex);
      return 0;
    }
    break;
  case pos_all_instr::VIEW_RWLOCK:
    rwlock= global_rwlock_container.get(m_pos.m_index_2);
    if (rwlock != NULL)
    {
      make_rwlock_row(rwlock);
      return 0;
    }
    break;
  case pos_all_instr::VIEW_COND:
    cond= global_cond_container.get(m_pos.m_index_2);
    if (cond != NULL)
    {
      make_cond_row(cond);
      return 0;
    }
    break;
  case pos_all_instr::VIEW_FILE:
    file= global_file_container.get(m_pos.m_index_2);
    if (file != NULL)
    {
      make_file_row(file);
      return 0;
    }
    break;
  case pos_all_instr::VIEW_SOCKET:
    socket= global_socket_container.get(m_pos.m_index_2);
    if (socket != NULL)
    {
      make_socket_row(socket);
      return 0;
    }
    break;
  }

  return HA_ERR_RECORD_DELETED;
}