1 /* Copyright (c) 2008, 2021, Oracle and/or its affiliates. 2 3 This program is free software; you can redistribute it and/or modify 4 it under the terms of the GNU General Public License, version 2.0, 5 as published by the Free Software Foundation. 6 7 This program is also distributed with certain software (including 8 but not limited to OpenSSL) that is licensed under separate terms, 9 as designated in a particular file or component or in included license 10 documentation. The authors of MySQL hereby grant you an additional 11 permission to link the program and your derivative works with the 12 separately licensed software that they have included with MySQL. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License, version 2.0, for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software Foundation, 21 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */ 22 23 #ifndef TABLE_SYNC_INSTANCE_H 24 #define TABLE_SYNC_INSTANCE_H 25 26 /** 27 @file storage/perfschema/table_sync_instances.h 28 Table MUTEX_INSTANCES, RWLOCK_INSTANCES and COND_INSTANCES (declarations). 29 */ 30 31 #include "pfs_column_types.h" 32 #include "pfs_engine_table.h" 33 34 struct PFS_mutex; 35 struct PFS_rwlock; 36 struct PFS_cond; 37 38 /** 39 @addtogroup Performance_schema_tables 40 @{ 41 */ 42 43 /** A row of table PERFORMANCE_SCHEMA.MUTEX_INSTANCES. */ 44 struct row_mutex_instances 45 { 46 /** Column NAME. */ 47 const char *m_name; 48 /** Length in bytes of @c m_name. */ 49 uint m_name_length; 50 /** Column OBJECT_INSTANCE_BEGIN. */ 51 const void *m_identity; 52 /** True if column LOCKED_BY_THREAD_ID is not null. */ 53 bool m_locked; 54 /** Column LOCKED_BY_THREAD_ID. */ 55 ulonglong m_locked_by_thread_id; 56 }; 57 58 /** Table PERFORMANCE_SCHEMA.MUTEX_INSTANCES. */ 59 class table_mutex_instances : public PFS_engine_table 60 { 61 public: 62 /** Table share. */ 63 static PFS_engine_table_share m_share; 64 static PFS_engine_table* create(); 65 static ha_rows get_row_count(); 66 67 virtual int rnd_next(); 68 virtual int rnd_pos(const void *pos); 69 virtual void reset_position(void); 70 71 private: 72 virtual int read_row_values(TABLE *table, 73 unsigned char *buf, 74 Field **fields, 75 bool read_all); 76 77 table_mutex_instances(); 78 79 public: ~table_mutex_instances()80 ~table_mutex_instances() 81 {} 82 83 private: 84 void make_row(PFS_mutex *pfs); 85 86 /** Table share lock. */ 87 static THR_LOCK m_table_lock; 88 /** Fields definition. */ 89 static TABLE_FIELD_DEF m_field_def; 90 91 /** Current row. */ 92 row_mutex_instances m_row; 93 /** True if the current row exists. */ 94 bool m_row_exists; 95 /** Current position. */ 96 PFS_simple_index m_pos; 97 /** Next position. */ 98 PFS_simple_index m_next_pos; 99 }; 100 101 /** A row of table PERFORMANCE_SCHEMA.RWLOCK_INSTANCES. */ 102 struct row_rwlock_instances 103 { 104 /** Column NAME. */ 105 const char *m_name; 106 /** Length in bytes of @c m_name. */ 107 uint m_name_length; 108 /** Column OBJECT_INSTANCE_BEGIN. */ 109 const void *m_identity; 110 /** True if column WRITE_LOCKED_BY_THREAD_ID is not null. */ 111 bool m_write_locked; 112 /** Column WRITE_LOCKED_BY_THREAD_ID. */ 113 ulonglong m_write_locked_by_thread_id; 114 /** Column READ_LOCKED_BY_COUNT. */ 115 ulong m_readers; 116 }; 117 118 /** Table PERFORMANCE_SCHEMA.RWLOCK_INSTANCES. */ 119 class table_rwlock_instances : public PFS_engine_table 120 { 121 public: 122 /** Table share */ 123 static PFS_engine_table_share m_share; 124 static PFS_engine_table* create(); 125 static ha_rows get_row_count(); 126 127 virtual int rnd_next(); 128 virtual int rnd_pos(const void *pos); 129 virtual void reset_position(void); 130 131 private: 132 virtual int read_row_values(TABLE *table, 133 unsigned char *buf, 134 Field **fields, 135 bool read_all); 136 137 table_rwlock_instances(); 138 139 public: ~table_rwlock_instances()140 ~table_rwlock_instances() 141 {} 142 143 private: 144 void make_row(PFS_rwlock *pfs); 145 146 /** Table share lock. */ 147 static THR_LOCK m_table_lock; 148 /** Fields definition. */ 149 static TABLE_FIELD_DEF m_field_def; 150 151 /** Current row. */ 152 row_rwlock_instances m_row; 153 /** True if the current row exists. */ 154 bool m_row_exists; 155 /** Current position. */ 156 PFS_simple_index m_pos; 157 /** Next position. */ 158 PFS_simple_index m_next_pos; 159 }; 160 161 /** A row of table PERFORMANCE_SCHEMA.COND_INSTANCES. */ 162 struct row_cond_instances 163 { 164 /** Column NAME. */ 165 const char *m_name; 166 /** Length in bytes of @c m_name. */ 167 uint m_name_length; 168 /** Column OBJECT_INSTANCE_BEGIN. */ 169 const void *m_identity; 170 }; 171 172 /** Table PERFORMANCE_SCHEMA.COND_INSTANCES. */ 173 class table_cond_instances : public PFS_engine_table 174 { 175 public: 176 /** Table share. */ 177 static PFS_engine_table_share m_share; 178 static PFS_engine_table* create(); 179 static ha_rows get_row_count(); 180 181 virtual int rnd_next(); 182 virtual int rnd_pos(const void *pos); 183 virtual void reset_position(void); 184 185 private: 186 virtual int read_row_values(TABLE *table, 187 unsigned char *buf, 188 Field **fields, 189 bool read_all); 190 191 table_cond_instances(); 192 193 public: ~table_cond_instances()194 ~table_cond_instances() 195 {} 196 197 private: 198 void make_row(PFS_cond *pfs); 199 200 /** Table share lock. */ 201 static THR_LOCK m_table_lock; 202 /** Fields definition. */ 203 static TABLE_FIELD_DEF m_field_def; 204 205 /** Current row. */ 206 row_cond_instances m_row; 207 /** True if the current row exists. */ 208 bool m_row_exists; 209 /** Current position. */ 210 PFS_simple_index m_pos; 211 /** Next position. */ 212 PFS_simple_index m_next_pos; 213 }; 214 215 /** @} */ 216 #endif 217