/* Copyright (c) 2008, 2011, 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_file_summary.cc
  Table FILE_SUMMARY_BY_INSTANCE (implementation).
*/

#include "my_global.h"
#include "my_pthread.h"
#include "pfs_instr_class.h"
#include "pfs_column_types.h"
#include "pfs_column_values.h"
#include "table_file_summary_by_instance.h"
#include "pfs_global.h"

THR_LOCK table_file_summary_by_instance::m_table_lock;

PFS_engine_table_share
table_file_summary_by_instance::m_share=
{
  { C_STRING_WITH_LEN("file_summary_by_instance") },
  &pfs_truncatable_acl,
  &table_file_summary_by_instance::create,
  NULL, /* write_row */
  table_file_summary_by_instance::delete_all_rows,
  NULL, /* get_row_count */
  1000, /* records */
  sizeof(PFS_simple_index),
  &m_table_lock,
  { C_STRING_WITH_LEN("CREATE TABLE file_summary_by_instance("
                      "FILE_NAME VARCHAR(512) not null,"
                      "EVENT_NAME VARCHAR(128) not null,"
                      "OBJECT_INSTANCE_BEGIN BIGINT unsigned not null,"
                      "COUNT_STAR BIGINT unsigned not null,"
                      "SUM_TIMER_WAIT BIGINT unsigned not null,"
                      "MIN_TIMER_WAIT BIGINT unsigned not null,"
                      "AVG_TIMER_WAIT BIGINT unsigned not null,"
                      "MAX_TIMER_WAIT BIGINT unsigned not null,"
                      "COUNT_READ BIGINT unsigned not null,"
                      "SUM_TIMER_READ BIGINT unsigned not null,"
                      "MIN_TIMER_READ BIGINT unsigned not null,"
                      "AVG_TIMER_READ BIGINT unsigned not null,"
                      "MAX_TIMER_READ BIGINT unsigned not null,"
                      "SUM_NUMBER_OF_BYTES_READ BIGINT not null,"
                      "COUNT_WRITE BIGINT unsigned not null,"
                      "SUM_TIMER_WRITE BIGINT unsigned not null,"
                      "MIN_TIMER_WRITE BIGINT unsigned not null,"
                      "AVG_TIMER_WRITE BIGINT unsigned not null,"
                      "MAX_TIMER_WRITE BIGINT unsigned not null,"
                      "SUM_NUMBER_OF_BYTES_WRITE BIGINT not null,"
                      "COUNT_MISC BIGINT unsigned not null,"
                      "SUM_TIMER_MISC BIGINT unsigned not null,"
                      "MIN_TIMER_MISC BIGINT unsigned not null,"
                      "AVG_TIMER_MISC BIGINT unsigned not null,"
                      "MAX_TIMER_MISC BIGINT unsigned not null)") }
};

PFS_engine_table* table_file_summary_by_instance::create(void)
{
  return new table_file_summary_by_instance();
}

int table_file_summary_by_instance::delete_all_rows(void)
{
  reset_file_instance_io();
  return 0;
}

table_file_summary_by_instance::table_file_summary_by_instance()
  : PFS_engine_table(&m_share, &m_pos),
  m_row_exists(false), m_pos(0), m_next_pos(0)
{}

void table_file_summary_by_instance::reset_position(void)
{
  m_pos.m_index= 0;
  m_next_pos.m_index= 0;
}

int table_file_summary_by_instance::rnd_next(void)
{
  PFS_file *pfs;

  for (m_pos.set_at(&m_next_pos);
       m_pos.m_index < file_max;
       m_pos.next())
  {
    pfs= &file_array[m_pos.m_index];
    if (pfs->m_lock.is_populated())
    {
      make_row(pfs);
      m_next_pos.set_after(&m_pos);
      return 0;
    }
  }

  return HA_ERR_END_OF_FILE;
}

int table_file_summary_by_instance::rnd_pos(const void *pos)
{
  PFS_file *pfs;

  set_position(pos);
  DBUG_ASSERT(m_pos.m_index < file_max);
  pfs= &file_array[m_pos.m_index];

  if (! pfs->m_lock.is_populated())
    return HA_ERR_RECORD_DELETED;

  make_row(pfs);
  return 0;
}

/**
  Build a row.
  @param pfs              the file the cursor is reading
*/
void table_file_summary_by_instance::make_row(PFS_file *pfs)
{
  pfs_lock lock;
  PFS_file_class *safe_class;

  m_row_exists= false;

  /* Protect this reader against a file delete */
  pfs->m_lock.begin_optimistic_lock(&lock);

  safe_class= sanitize_file_class(pfs->m_class);
  if (unlikely(safe_class == NULL))
    return;

  m_row.m_filename= pfs->m_filename;
  m_row.m_filename_length= pfs->m_filename_length;
  m_row.m_event_name.make_row(safe_class);
  m_row.m_identity= pfs->m_identity;

  time_normalizer *normalizer= time_normalizer::get(wait_timer);

  /* Collect timer and byte count stats */
  m_row.m_io_stat.set(normalizer, &pfs->m_file_stat.m_io_stat);

  if (pfs->m_lock.end_optimistic_lock(&lock))
    m_row_exists= true;
}

int table_file_summary_by_instance::read_row_values(TABLE *table,
                                                          unsigned char *,
                                                          Field **fields,
                                                          bool read_all)
{
  Field *f;

  if (unlikely(! m_row_exists))
    return HA_ERR_RECORD_DELETED;

  /* Set the null bits */
  DBUG_ASSERT(table->s->null_bytes == 0);

  for (; (f= *fields) ; fields++)
  {
    if (read_all || bitmap_is_set(table->read_set, f->field_index))
    {
      switch(f->field_index)
      {
      case  0: /* FILE_NAME */
        set_field_varchar_utf8(f, m_row.m_filename, m_row.m_filename_length);
        break;
      case  1: /* EVENT_NAME */
        m_row.m_event_name.set_field(f);
        break;
      case  2: /* OBJECT_INSTANCE */
        set_field_ulonglong(f, (ulonglong)m_row.m_identity);
        break;

      case  3:/* COUNT_STAR */
        set_field_ulonglong(f, m_row.m_io_stat.m_all.m_waits.m_count);
        break;
      case  4:/* SUM_TIMER_WAIT */
        set_field_ulonglong(f, m_row.m_io_stat.m_all.m_waits.m_sum);
        break;
      case  5: /* MIN_TIMER_WAIT */
        set_field_ulonglong(f, m_row.m_io_stat.m_all.m_waits.m_min);
        break;
      case  6: /* AVG_TIMER_WAIT */
        set_field_ulonglong(f, m_row.m_io_stat.m_all.m_waits.m_avg);
        break;
      case  7: /* MAX_TIMER_WAIT */
        set_field_ulonglong(f, m_row.m_io_stat.m_all.m_waits.m_max);
        break;

      case  8: /* COUNT_READ */
        set_field_ulonglong(f, m_row.m_io_stat.m_read.m_waits.m_count);
        break;
      case  9: /* SUM_TIMER_READ */
        set_field_ulonglong(f, m_row.m_io_stat.m_read.m_waits.m_sum);
        break;
      case 10: /* MIN_TIMER_READ */
        set_field_ulonglong(f, m_row.m_io_stat.m_read.m_waits.m_min);
        break;
      case 11: /* AVG_TIMER_READ */
        set_field_ulonglong(f, m_row.m_io_stat.m_read.m_waits.m_avg);
        break;
      case 12: /* MAX_TIMER_READ */
        set_field_ulonglong(f, m_row.m_io_stat.m_read.m_waits.m_max);
        break;
      case 13: /* SUM_NUMBER_OF_BYTES_READ */
        set_field_ulonglong(f, m_row.m_io_stat.m_read.m_bytes);
        break;

      case 14: /* COUNT_WRITE */
        set_field_ulonglong(f, m_row.m_io_stat.m_write.m_waits.m_count);
        break;
      case 15: /* SUM_TIMER_WRITE */
        set_field_ulonglong(f, m_row.m_io_stat.m_write.m_waits.m_sum);
        break;
      case 16: /* MIN_TIMER_WRITE */
        set_field_ulonglong(f, m_row.m_io_stat.m_write.m_waits.m_min);
        break;
      case 17: /* AVG_TIMER_WRITE */
        set_field_ulonglong(f, m_row.m_io_stat.m_write.m_waits.m_avg);
        break;
      case 18: /* MAX_TIMER_WRITE */
        set_field_ulonglong(f, m_row.m_io_stat.m_write.m_waits.m_max);
        break;
      case 19: /* SUM_NUMBER_OF_BYTES_WRITE */
        set_field_ulonglong(f, m_row.m_io_stat.m_write.m_bytes);
        break;

      case 20: /* COUNT_MISC */
        set_field_ulonglong(f, m_row.m_io_stat.m_misc.m_waits.m_count);
        break;
      case 21: /* SUM_TIMER_MISC */
        set_field_ulonglong(f, m_row.m_io_stat.m_misc.m_waits.m_sum);
        break;
      case 22: /* MIN_TIMER_MISC */
        set_field_ulonglong(f, m_row.m_io_stat.m_misc.m_waits.m_min);
        break;
      case 23: /* AVG_TIMER_MISC */
        set_field_ulonglong(f, m_row.m_io_stat.m_misc.m_waits.m_avg);
        break;
      case 24: /* MAX_TIMER_MISC */
        set_field_ulonglong(f, m_row.m_io_stat.m_misc.m_waits.m_max);
        break;
      default:
        DBUG_ASSERT(false);
      }
    }
  }

  return 0;
}

