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- /*
- Copyright (c) 2013, 2021, 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 also distributed 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 included with MySQL.
-
- 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 */
-
- /**
- @file storage/perfschema/table_replication_applier_configuration.cc
- Table replication_applier_configuration (implementation).
- */
-
- #define HAVE_REPLICATION
-
- #include "my_global.h"
- #include "table_replication_applier_configuration.h"
- #include "pfs_instr_class.h"
- #include "pfs_instr.h"
- #include "rpl_slave.h"
- #include "rpl_info.h"
- #include "rpl_rli.h"
- #include "rpl_mi.h"
- #include "sql_parse.h"
- #include "rpl_msr.h" /* Multisource replication */
-
- THR_LOCK table_replication_applier_configuration::m_table_lock;
-
- /*
- numbers in varchar count utf8 characters.
- */
- static const TABLE_FIELD_TYPE field_types[]=
- {
- {
- {C_STRING_WITH_LEN("CHANNEL_NAME")},
- {C_STRING_WITH_LEN("char(64)")},
- {NULL,0}
- },
-
- {
- {C_STRING_WITH_LEN("DESIRED_DELAY")},
- {C_STRING_WITH_LEN("int(11)")},
- {NULL, 0}
- }
- };
-
- TABLE_FIELD_DEF
- table_replication_applier_configuration::m_field_def=
- { 2, field_types };
-
- PFS_engine_table_share
- table_replication_applier_configuration::m_share=
- {
- { C_STRING_WITH_LEN("replication_applier_configuration") },
- &pfs_readonly_acl,
- table_replication_applier_configuration::create,
- NULL, /* write_row */
- NULL, /* delete_all_rows */
- table_replication_applier_configuration::get_row_count,
- sizeof(pos_t), /* ref length */
- &m_table_lock,
- &m_field_def,
- false, /* checked */
- false /* perpetual */
- };
-
- PFS_engine_table* table_replication_applier_configuration::create(void)
- {
- return new table_replication_applier_configuration();
- }
-
- table_replication_applier_configuration
- ::table_replication_applier_configuration()
- : PFS_engine_table(&m_share, &m_pos),
- m_row_exists(false), m_pos(0), m_next_pos(0)
- {}
-
- table_replication_applier_configuration
- ::~table_replication_applier_configuration()
- {}
-
- void table_replication_applier_configuration::reset_position(void)
- {
- m_pos.m_index= 0;
- m_next_pos.m_index= 0;
- }
-
-
- ha_rows table_replication_applier_configuration::get_row_count()
- {
- return channel_map.get_max_channels();
- }
-
-
- int table_replication_applier_configuration::rnd_next(void)
- {
- Master_info *mi;
- channel_map.rdlock();
-
- for (m_pos.set_at(&m_next_pos);
- m_pos.m_index < channel_map.get_max_channels();
- m_pos.next())
- {
- mi= channel_map.get_mi_at_pos(m_pos.m_index);
-
- if (mi && mi->host[0])
- {
- make_row(mi);
- m_next_pos.set_after(&m_pos);
- channel_map.unlock();
- return 0;
- }
- }
-
- channel_map.unlock();
- return HA_ERR_END_OF_FILE;
- }
-
- int table_replication_applier_configuration::rnd_pos(const void *pos)
- {
- Master_info *mi;
- int res= HA_ERR_RECORD_DELETED;
-
- set_position(pos);
-
- channel_map.rdlock();
-
- if ((mi= channel_map.get_mi_at_pos(m_pos.m_index)))
- {
- make_row(mi);
- res= 0;
- }
-
- channel_map.unlock();
- return res;
- }
-
- void table_replication_applier_configuration::make_row(Master_info *mi)
- {
- m_row_exists= false;
-
- assert(mi != NULL);
- assert(mi->rli != NULL);
-
- mysql_mutex_lock(&mi->data_lock);
- mysql_mutex_lock(&mi->rli->data_lock);
-
- m_row.channel_name_length= mi->get_channel() ? strlen(mi->get_channel()):0;
- memcpy(m_row.channel_name, mi->get_channel(), m_row.channel_name_length);
- m_row.desired_delay= mi->rli->get_sql_delay();
-
- mysql_mutex_unlock(&mi->rli->data_lock);
- mysql_mutex_unlock(&mi->data_lock);
-
- m_row_exists= true;
- }
-
- int table_replication_applier_configuration::read_row_values(TABLE *table,
- unsigned char *buf,
- Field **fields,
- bool read_all)
- {
- Field *f;
-
- if (unlikely(! m_row_exists))
- return HA_ERR_RECORD_DELETED;
-
- /*
- Note:
- There are no NULL columns in this table,
- so there are no null bits reserved for NULL flags per column.
- There are no VARCHAR columns either, so the record is not
- in HA_OPTION_PACK_RECORD format as most other performance_schema tables.
- When HA_OPTION_PACK_RECORD is not set,
- the table record reserves an extra null byte, see open_binary_frm().
- */
-
- 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: /**channel_name*/
- set_field_char_utf8(f, m_row.channel_name, m_row.channel_name_length);
- break;
- case 1: /** desired_delay */
- set_field_ulong(f, static_cast<ulong>(m_row.desired_delay));
- break;
- default:
- assert(false);
- }
- }
- }
- return 0;
- }
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