diff options
Diffstat (limited to 'storage/innobase/include/trx0trx.h')
| -rw-r--r-- | storage/innobase/include/trx0trx.h | 37 |
1 files changed, 27 insertions, 10 deletions
diff --git a/storage/innobase/include/trx0trx.h b/storage/innobase/include/trx0trx.h index 6a817ccdc8e..588ddd65e88 100644 --- a/storage/innobase/include/trx0trx.h +++ b/storage/innobase/include/trx0trx.h @@ -44,6 +44,9 @@ extern sess_t* trx_dummy_sess; /** Number of transactions currently allocated for MySQL: protected by the kernel mutex */ extern ulint trx_n_mysql_transactions; +/** Number of transactions currently in the XA PREPARED state: protected by +the kernel mutex */ +extern ulint trx_n_prepared; /********************************************************************//** Releases the search latch if trx has reserved it. */ @@ -108,6 +111,14 @@ trx_free( /*=====*/ trx_t* trx); /*!< in, own: trx object */ /********************************************************************//** +At shutdown, frees a transaction object that is in the PREPARED state. */ +UNIV_INTERN +void +trx_free_prepared( +/*==============*/ + trx_t* trx) /*!< in, own: trx object */ + UNIV_COLD __attribute__((nonnull)); +/********************************************************************//** Frees a transaction object for MySQL. */ UNIV_INTERN void @@ -214,12 +225,12 @@ trx_recover_for_mysql( /*******************************************************************//** This function is used to find one X/Open XA distributed transaction which is in the prepared state -@return trx or NULL */ +@return trx or NULL; on match, the trx->xid will be invalidated */ UNIV_INTERN trx_t * trx_get_trx_by_xid( /*===============*/ - XID* xid); /*!< in: X/Open XA transaction identification */ + const XID* xid); /*!< in: X/Open XA transaction identifier */ /**********************************************************************//** If required, flushes the log to disk if we called trx_commit_for_mysql() with trx->flush_log_later == TRUE. @@ -470,6 +481,20 @@ struct trx_struct{ of view of concurrency control: TRX_ACTIVE, TRX_COMMITTED_IN_MEMORY, ... */ + /*------------------------------*/ + /* MySQL has a transaction coordinator to coordinate two phase + commit between multiple storage engines and the binary log. When + an engine participates in a transaction, it's responsible for + registering itself using the trans_register_ha() API. */ + unsigned is_registered:1;/* This flag is set to 1 after the + transaction has been registered with + the coordinator using the XA API, and + is set to 0 after commit or rollback. */ + unsigned owns_prepare_mutex:1;/* 1 if owns prepare mutex, if + this is set to 1 then registered should + also be set to 1. This is used in the + XA code */ + /*------------------------------*/ ulint isolation_level;/* TRX_ISO_REPEATABLE_READ, ... */ ulint check_foreigns; /* normally TRUE, but if the user wants to suppress foreign key checks, @@ -500,9 +525,6 @@ struct trx_struct{ in that case we must flush the log in trx_commit_complete_for_mysql() */ ulint duplicates; /*!< TRX_DUP_IGNORE | TRX_DUP_REPLACE */ - ulint active_trans; /*!< 1 - if a transaction in MySQL - is active. 2 - if prepare_commit_mutex - was taken */ ulint has_search_latch; /* TRUE if this trx has latched the search system latch in S-mode */ @@ -558,11 +580,6 @@ struct trx_struct{ ib_int64_t mysql_log_offset;/* if MySQL binlog is used, this field contains the end offset of the binlog entry */ - os_thread_id_t mysql_thread_id;/* id of the MySQL thread associated - with this transaction object */ - ulint mysql_process_no;/* since in Linux, 'top' reports - process id's and not thread id's, we - store the process number too */ /*------------------------------*/ ulint n_mysql_tables_in_use; /* number of Innobase tables used in the processing of the current |