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/* Copyright (c) 2008, 2010, 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_performance_timers.cc
Table PERFORMANCE_TIMERS (implementation).
*/
#include "my_global.h"
#include "my_pthread.h"
#include "table_performance_timers.h"
#include "pfs_timer.h"
#include "pfs_global.h"
THR_LOCK table_performance_timers::m_table_lock;
static const TABLE_FIELD_TYPE field_types[]=
{
{
{ C_STRING_WITH_LEN("TIMER_NAME") },
{ C_STRING_WITH_LEN("enum(\'CYCLE\',\'NANOSECOND\',\'MICROSECOND\',"
"\'MILLISECOND\',\'TICK\')") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("TIMER_FREQUENCY") },
{ C_STRING_WITH_LEN("bigint(20)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("TIMER_RESOLUTION") },
{ C_STRING_WITH_LEN("bigint(20)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("TIMER_OVERHEAD") },
{ C_STRING_WITH_LEN("bigint(20)") },
{ NULL, 0}
}
};
TABLE_FIELD_DEF
table_performance_timers::m_field_def=
{ 4, field_types };
PFS_engine_table_share
table_performance_timers::m_share=
{
{ C_STRING_WITH_LEN("performance_timers") },
&pfs_readonly_acl,
&table_performance_timers::create,
NULL, /* write_row */
NULL, /* delete_all_rows */
COUNT_TIMER_NAME, /* records */
sizeof(PFS_simple_index), /* ref length */
&m_table_lock,
&m_field_def,
false /* checked */
};
PFS_engine_table* table_performance_timers::create(void)
{
return new table_performance_timers();
}
table_performance_timers::table_performance_timers()
: PFS_engine_table(&m_share, &m_pos),
m_row(NULL), m_pos(0), m_next_pos(0)
{
int index;
index= (int)TIMER_NAME_CYCLE - FIRST_TIMER_NAME;
m_data[index].m_timer_name= TIMER_NAME_CYCLE;
m_data[index].m_info= pfs_timer_info.cycles;
index= (int)TIMER_NAME_NANOSEC - FIRST_TIMER_NAME;
m_data[index].m_timer_name= TIMER_NAME_NANOSEC;
m_data[index].m_info= pfs_timer_info.nanoseconds;
index= (int)TIMER_NAME_MICROSEC - FIRST_TIMER_NAME;
m_data[index].m_timer_name= TIMER_NAME_MICROSEC;
m_data[index].m_info= pfs_timer_info.microseconds;
index= (int)TIMER_NAME_MILLISEC - FIRST_TIMER_NAME;
m_data[index].m_timer_name= TIMER_NAME_MILLISEC;
m_data[index].m_info= pfs_timer_info.milliseconds;
index= (int)TIMER_NAME_TICK - FIRST_TIMER_NAME;
m_data[index].m_timer_name= TIMER_NAME_TICK;
m_data[index].m_info= pfs_timer_info.ticks;
}
void table_performance_timers::reset_position(void)
{
m_pos.m_index= 0;
m_next_pos.m_index= 0;
}
int table_performance_timers::rnd_next(void)
{
int result;
m_pos.set_at(&m_next_pos);
if (m_pos.m_index < COUNT_TIMER_NAME)
{
m_row= &m_data[m_pos.m_index];
m_next_pos.set_after(&m_pos);
result= 0;
}
else
{
m_row= NULL;
result= HA_ERR_END_OF_FILE;
}
return result;
}
int table_performance_timers::rnd_pos(const void *pos)
{
set_position(pos);
DBUG_ASSERT(m_pos.m_index < COUNT_TIMER_NAME);
m_row= &m_data[m_pos.m_index];
return 0;
}
int table_performance_timers::read_row_values(TABLE *table,
unsigned char *buf,
Field **fields,
bool read_all)
{
Field *f;
DBUG_ASSERT(m_row);
/* Set the null bits */
DBUG_ASSERT(table->s->null_bytes == 1);
buf[0]= 0;
for (; (f= *fields) ; fields++)
{
if (read_all || bitmap_is_set(table->read_set, f->field_index))
{
switch(f->field_index)
{
case 0: /* TIMER_NAME */
set_field_enum(f, m_row->m_timer_name);
break;
case 1: /* TIMER_FREQUENCY */
if (m_row->m_info.routine != 0)
set_field_ulonglong(f, m_row->m_info.frequency);
else
f->set_null();
break;
case 2: /* TIMER_RESOLUTION */
if (m_row->m_info.routine != 0)
set_field_ulonglong(f, m_row->m_info.resolution);
else
f->set_null();
break;
case 3: /* TIMER_OVERHEAD */
if (m_row->m_info.routine != 0)
set_field_ulonglong(f, m_row->m_info.overhead);
else
f->set_null();
break;
default:
DBUG_ASSERT(false);
}
}
}
return 0;
}
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