Current File : //usr/include/mysql/server/private/wsrep_binlog.h
/* 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 */
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