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wsrep_binlog.h
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/* Copyright (C) 2013 Codership Oy <info@codership.com> 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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA. */ #ifndef WSREP_BINLOG_H #define WSREP_BINLOG_H #include "my_global.h" #include "sql_class.h" // THD, IO_CACHE #define HEAP_PAGE_SIZE 65536 /* 64K */ #define WSREP_MAX_WS_SIZE 2147483647 /* 2GB */ /* Write the contents of a cache to a memory buffer. This function quite the same as MYSQL_BIN_LOG::write_cache(), with the exception that here we write in buffer instead of log file. */ int wsrep_write_cache_buf(IO_CACHE *cache, uchar **buf, size_t *buf_len); /* Write the contents of a cache to wsrep provider. This function quite the same as MYSQL_BIN_LOG::write_cache(), with the exception that here we write in buffer instead of log file. @param len total amount of data written @return wsrep error status */ int wsrep_write_cache(THD* thd, IO_CACHE* cache, size_t* len); /* Dump replication buffer to disk */ void wsrep_dump_rbr_buf(THD *thd, const void* rbr_buf, size_t buf_len); /* Dump replication buffer along with header to a file */ void wsrep_dump_rbr_buf_with_header(THD *thd, const void *rbr_buf, size_t buf_len); /** Write a skip event into binlog. @param thd Thread object pointer @return Zero in case of success, non-zero on failure. */ int wsrep_write_skip_event(THD* thd); /* Write dummy event into binlog in place of unused GTID. The binlog write is done in thd context. */ int wsrep_write_dummy_event_low(THD *thd, const char *msg); /* Write dummy event to binlog in place of unused GTID and commit. The binlog write and commit are done in temporary thd context, the original thd state is not altered. */ int wsrep_write_dummy_event(THD* thd, const char *msg); void wsrep_register_binlog_handler(THD *thd, bool trx); /** Return true if committing THD will write to binlog during commit. This is the case for: - Local THD, binlog is open - Replaying THD, binlog is open - Applier THD, log-slave-updates is enabled */ bool wsrep_commit_will_write_binlog(THD *thd); /** Register THD for group commit. The wsrep_trx must be in committing state, i.e. the call must be done after wsrep_before_commit() but before commit order is released. This call will release commit order critical section if it is determined that the commit will go through binlog group commit. */ void wsrep_register_for_group_commit(THD *thd); /** Deregister THD from group commit. The wsrep_trx must be in committing state, as for wsrep_register_for_group_commit() above. This call must be used only for THDs which will not go through binlog group commit. */ void wsrep_unregister_from_group_commit(THD *thd); #endif /* WSREP_BINLOG_H */