FM / private

/usr/include/mysql/server/private

Name	Size	Mode	Actions
atomic/	-	0755	rm
data/	-	0755	rm
aligned.h	1136	0644	edit dl rm
aria_backup.h	1547	0644	edit dl rm
assume_aligned.h	2350	0644	edit dl rm
authors.h	10141	0644	edit dl rm
backup.h	1703	0644	edit dl rm
bounded_queue.h	6093	0644	edit dl rm
client_settings.h	1935	0644	edit dl rm
compat56.h	2280	0644	edit dl rm
config.h	14574	0644	edit dl rm
contributors.h	4878	0644	edit dl rm
create_options.h	4524	0644	edit dl rm
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cset_narrowing.h	3968	0644	edit dl rm
custom_conf.h	1082	0644	edit dl rm
datadict.h	1700	0644	edit dl rm
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debug.h	1234	0644	edit dl rm
debug_sync.h	2046	0644	edit dl rm
derived_handler.h	2379	0644	edit dl rm
derror.h	980	0644	edit dl rm
des_key_file.h	1236	0644	edit dl rm
discover.h	1570	0644	edit dl rm
dur_prop.h	1082	0644	edit dl rm
embedded_priv.h	1733	0644	edit dl rm
events.h	4704	0644	edit dl rm
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mysqld.h	40547	0644	edit dl rm
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mysys_err.h	3022	0644	edit dl rm
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my_atomic.h	7281	0644	edit dl rm
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password.h	1170	0644	edit dl rm
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pfs_thread_provider.h	5560	0644	edit dl rm
pfs_transaction_provider.h	2846	0644	edit dl rm
privilege.h	28642	0644	edit dl rm
probes_mysql.h	973	0644	edit dl rm
probes_mysql_nodtrace.h	6087	0644	edit dl rm
procedure.h	6819	0644	edit dl rm
protocol.h	12490	0644	edit dl rm
proxy_protocol.h	548	0644	edit dl rm
queues.h	3477	0644	edit dl rm
records.h	3147	0644	edit dl rm
replication.h	16106	0644	edit dl rm
repl_failsafe.h	1585	0644	edit dl rm
rijndael.h	1711	0644	edit dl rm
rowid_filter.h	15477	0644	edit dl rm
rpl_constants.h	3357	0644	edit dl rm
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rpl_injector.h	9621	0644	edit dl rm
rpl_mi.h	14991	0644	edit dl rm
rpl_parallel.h	17461	0644	edit dl rm
rpl_record.h	1585	0644	edit dl rm
rpl_record_old.h	1407	0644	edit dl rm
rpl_reporting.h	3713	0644	edit dl rm
rpl_rli.h	32746	0644	edit dl rm
rpl_tblmap.h	3177	0644	edit dl rm
rpl_utility.h	9630	0644	edit dl rm
scheduler.h	3199	0644	edit dl rm
scope.h	4393	0644	edit dl rm
select_handler.h	2228	0644	edit dl rm
semisync.h	2287	0644	edit dl rm
semisync_master.h	25766	0644	edit dl rm
semisync_master_ack_receiver.h	8709	0644	edit dl rm
semisync_slave.h	3733	0644	edit dl rm
service_versions.h	2049	0644	edit dl rm
session_tracker.h	14275	0644	edit dl rm
set_var.h	16551	0644	edit dl rm
slave.h	12275	0644	edit dl rm
socketpair.h	842	0644	edit dl rm
source_revision.h	67	0644	edit dl rm
sp.h	22588	0644	edit dl rm
span.h	3931	0644	edit dl rm
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sp_cache.h	2045	0644	edit dl rm
sp_head.h	64509	0644	edit dl rm
sp_pcontext.h	24897	0644	edit dl rm
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sql_acl.h	14132	0644	edit dl rm
sql_admin.h	2915	0644	edit dl rm
sql_alloc.h	1732	0644	edit dl rm
sql_alter.h	15277	0644	edit dl rm
sql_analyse.h	11125	0644	edit dl rm
sql_analyze_stmt.h	12681	0644	edit dl rm
sql_array.h	6875	0644	edit dl rm
sql_audit.h	13943	0644	edit dl rm
sql_base.h	25889	0644	edit dl rm
sql_basic_types.h	9528	0644	edit dl rm
sql_binlog.h	895	0644	edit dl rm
sql_bitmap.h	7845	0644	edit dl rm
sql_bootstrap.h	1812	0644	edit dl rm
sql_cache.h	21676	0644	edit dl rm
sql_callback.h	1542	0644	edit dl rm
sql_class.h	267535	0644	edit dl rm
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sql_command.h	4804	0644	edit dl rm
sql_connect.h	4087	0644	edit dl rm
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sql_crypt.h	1437	0644	edit dl rm
sql_cte.h	16533	0644	edit dl rm
sql_cursor.h	2316	0644	edit dl rm
sql_db.h	2440	0644	edit dl rm
sql_debug.h	5727	0644	edit dl rm
sql_delete.h	1343	0644	edit dl rm
sql_derived.h	1289	0644	edit dl rm
sql_digest.h	3819	0644	edit dl rm
sql_digest_stream.h	1567	0644	edit dl rm
sql_do.h	954	0644	edit dl rm
sql_error.h	39588	0644	edit dl rm
sql_explain.h	29020	0644	edit dl rm
sql_expression_cache.h	4359	0644	edit dl rm
sql_get_diagnostics.h	7867	0644	edit dl rm
sql_handler.h	2910	0644	edit dl rm
sql_help.h	995	0644	edit dl rm
sql_hset.h	3401	0644	edit dl rm
sql_insert.h	2651	0644	edit dl rm
sql_i_s.h	8232	0644	edit dl rm
sql_join_cache.h	48669	0644	edit dl rm
sql_lex.h	172548	0644	edit dl rm
sql_lifo_buffer.h	9676	0644	edit dl rm
sql_limit.h	3187	0644	edit dl rm
sql_list.h	22458	0644	edit dl rm
sql_load.h	1276	0644	edit dl rm
sql_locale.h	2701	0644	edit dl rm
sql_manager.h	960	0644	edit dl rm
sql_mode.h	6735	0644	edit dl rm
sql_parse.h	9135	0644	edit dl rm
sql_partition.h	12072	0644	edit dl rm
sql_partition_admin.h	5940	0644	edit dl rm
sql_plist.h	7732	0644	edit dl rm
sql_plugin.h	7549	0644	edit dl rm
sql_plugin_compat.h	2237	0644	edit dl rm
sql_prepare.h	11409	0644	edit dl rm
sql_priv.h	18593	0644	edit dl rm
sql_profile.h	7816	0644	edit dl rm
sql_reload.h	1036	0644	edit dl rm
sql_rename.h	982	0644	edit dl rm
sql_repl.h	3045	0644	edit dl rm
sql_schema.h	3303	0644	edit dl rm
sql_select.h	88898	0644	edit dl rm
sql_sequence.h	5180	0644	edit dl rm
sql_servers.h	1777	0644	edit dl rm
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sql_table.h	9612	0644	edit dl rm
sql_tablespace.h	956	0644	edit dl rm
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sql_type_real.h	1257	0644	edit dl rm
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transaction.h	1466	0644	edit dl rm
tzfile.h	5014	0644	edit dl rm
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winservice.h	1194	0644	edit dl rm
win_tzname_data.h	6506	0644	edit dl rm
wqueue.h	1565	0644	edit dl rm
wsrep.h	3308	0644	edit dl rm
wsrep_applier.h	2703	0644	edit dl rm
wsrep_binlog.h	3441	0644	edit dl rm
wsrep_client_service.h	2560	0644	edit dl rm
wsrep_client_state.h	1566	0644	edit dl rm
wsrep_condition_variable.h	1484	0644	edit dl rm
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wsrep_mutex.h	1216	0644	edit dl rm
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wsrep_mysqld_c.h	1227	0644	edit dl rm
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wsrep_storage_service.h	1809	0644	edit dl rm
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wsrep_trans_observer.h	18119	0644	edit dl rm
wsrep_types.h	997	0644	edit dl rm
wsrep_utils.h	9290	0644	edit dl rm
wsrep_var.h	4607	0644	edit dl rm
wsrep_xid.h	1549	0644	edit dl rm
xa.h	1845	0644	edit dl rm

Edit: /usr/include/mysql/server/private/wsrep_trans_observer.h (18119B)

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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

#ifndef WSREP_TRANS_OBSERVER_H
#define WSREP_TRANS_OBSERVER_H

#include "my_global.h"
#include "mysql/service_wsrep.h"
#include "wsrep_applier.h" /* wsrep_apply_error */
#include "wsrep_xid.h"
#include "wsrep_thd.h"
#include "wsrep_binlog.h" /* register/deregister group commit */
#include "my_dbug.h"

class THD;

void wsrep_commit_empty(THD* thd, bool all);

/*
   Return true if THD has active wsrep transaction.
 */
static inline bool wsrep_is_active(THD* thd)
{
  return (thd->wsrep_cs().state() != wsrep::client_state::s_none  &&
          thd->wsrep_cs().transaction().active() &&
          !thd->internal_transaction());
}

/*
  Return true if transaction is ordered.
 */
static inline bool wsrep_is_ordered(THD* thd)
{
  return thd->wsrep_trx().ordered();
}

/*
  Return true if transaction has been BF aborted but has not been
  rolled back yet.

It is required that the caller holds thd->LOCK_thd_data.
*/
static inline bool wsrep_must_abort(THD* thd)
{
  mysql_mutex_assert_owner(&thd->LOCK_thd_data);
  return (thd->wsrep_trx().state() == wsrep::transaction::s_must_abort);
}

/*
  Return true if the transaction must be replayed.
 */
static inline bool wsrep_must_replay(THD* thd)
{
  return (thd->wsrep_trx().state() == wsrep::transaction::s_must_replay);
}
/*
  Return true if transaction has not been committed.

Note that we don't require thd->LOCK_thd_data here. Calling this method
  makes sense only from codepaths which are past ordered_commit state
  and the wsrep transaction is immune to BF aborts at that point.
*/
static inline bool wsrep_not_committed(THD* thd)
{
  return (thd->wsrep_trx().state() != wsrep::transaction::s_committed);
}

/*
  Return true if THD is either committing a transaction or statement
  is autocommit.
 */
static inline bool wsrep_is_real(THD* thd, bool all)
{
  return (all || thd->transaction->all.ha_list == 0);
}

/*
  Check if a transaction has generated changes.
 */
static inline bool wsrep_has_changes(THD* thd)
{
  // Transaction has changes to replicate if it
  // has appended one or more certification keys,
  // and has actual changes to replicate in binlog
  // cache. Except for streaming replication,
  // where commit message may have no payload.
  return !thd->wsrep_trx().is_empty() &&
    (!wsrep_is_binlog_cache_empty(thd) || thd->wsrep_trx().is_streaming());
}

/*
  Check if an active transaction has been BF aborted.
 */
static inline bool wsrep_is_bf_aborted(THD* thd)
{
  return (thd->wsrep_trx().active() && thd->wsrep_trx().bf_aborted());
}

static inline int wsrep_check_pk(THD* thd)
{
  if (!wsrep_certify_nonPK)
  {
    for (TABLE* table= thd->open_tables; table != NULL; table= table->next)
    {
      if (table->key_info == NULL || table->s->primary_key == MAX_KEY)
      {
        WSREP_DEBUG("No primary key found for table %s.%s",
                    table->s->db.str, table->s->table_name.str);
        wsrep_override_error(thd, ER_LOCK_DEADLOCK);
        return 1;
      }
    }
  }
  return 0;
}

static inline bool wsrep_streaming_enabled(THD* thd)
{
  return (thd->wsrep_sr().fragment_size() > 0);
}

/*
  Return number of fragments successfully certified for the
  current statement.
 */
static inline size_t wsrep_fragments_certified_for_stmt(THD* thd)
{
    return thd->wsrep_trx().fragments_certified_for_statement();
}

static inline int wsrep_start_transaction(THD* thd, wsrep_trx_id_t trx_id)
{
  if (thd->wsrep_cs().state() != wsrep::client_state::s_none) {
    if (wsrep_is_active(thd) == false)
      return thd->wsrep_cs().start_transaction(wsrep::transaction_id(trx_id));
  }
  return 0;
}

/**/
static inline int wsrep_start_trx_if_not_started(THD* thd)
{
  int ret= 0;
  DBUG_ASSERT(thd->wsrep_next_trx_id() != WSREP_UNDEFINED_TRX_ID);
  DBUG_ASSERT(thd->wsrep_cs().mode() == Wsrep_client_state::m_local);
  if (thd->wsrep_trx().active() == false)
  {
    ret= wsrep_start_transaction(thd, thd->wsrep_next_trx_id());
  }
  return ret;
}

/*
  Called after each row operation.

Return zero on succes, non-zero on failure.
 */
static inline int wsrep_after_row_internal(THD* thd)
{
  if (thd->wsrep_cs().state() != wsrep::client_state::s_none  &&
      wsrep_thd_is_local(thd))
  {
    if (wsrep_check_pk(thd))
    {
      return 1;
    }
    else if (wsrep_streaming_enabled(thd))
    {
      return thd->wsrep_cs().after_row();
    }
  }
  return 0;
}

/*
  Helper method to determine whether commit time hooks
  should be run for the transaction.

Commit hooks must be run in the following cases:
  - The transaction is local and has generated write set and is committing.
  - The transaction has been BF aborted
  - Is running in high priority mode and is ordered. This can be replayer,
    applier or storage access.
 */
static inline bool wsrep_run_commit_hook(THD* thd, bool all)
{
  DBUG_ENTER("wsrep_run_commit_hook");
  DBUG_PRINT("wsrep", ("Is_active: %d is_real %d has_changes %d is_applying %d "
                       "is_ordered: %d",
                       wsrep_is_active(thd), wsrep_is_real(thd, all),
                       wsrep_has_changes(thd), wsrep_thd_is_applying(thd),
                       wsrep_is_ordered(thd)));

/* skipping non-wsrep threads */
  if (!WSREP(thd))
    DBUG_RETURN(false);

/* Is MST commit or autocommit? */
  bool ret= wsrep_is_active(thd) && wsrep_is_real(thd, all);
  /* Do not commit if we are aborting */
  ret= ret && (thd->wsrep_trx().state() != wsrep::transaction::s_aborting);
  if (ret && !(wsrep_has_changes(thd) ||  /* Has generated write set */
               /* Is high priority (replay, applier, storage) and the
                  transaction is scheduled for commit ordering */
               (wsrep_thd_is_applying(thd) && wsrep_is_ordered(thd))))
  {
    mysql_mutex_lock(&thd->LOCK_thd_data);
    DBUG_PRINT("wsrep", ("state: %s",
                         wsrep::to_c_string(thd->wsrep_trx().state())));
    /* Transaction is local but has no changes, the commit hooks will
       be skipped and the wsrep transaction is terminated in
       wsrep_commit_empty() */
    if (thd->wsrep_trx().state() == wsrep::transaction::s_executing)
    {
      ret= false;
    }
    mysql_mutex_unlock(&thd->LOCK_thd_data);
  }

mysql_mutex_lock(&thd->LOCK_thd_data);
  /* Transaction creating sequence is TOI or RSU,
  CREATE SEQUENCE = CREATE + INSERT (initial value)
  and replicated using statement based replication, thus
  the commit hooks will be skipped.

For TEMPORARY SEQUENCES commit hooks will be done as
  CREATE + INSERT is not replicated and needs to be
  committed locally. */
  if (ret &&
      (thd->wsrep_cs().mode() == wsrep::client_state::m_toi ||
       thd->wsrep_cs().mode() == wsrep::client_state::m_rsu) &&
      thd->lex->sql_command == SQLCOM_CREATE_SEQUENCE &&
      !thd->lex->tmp_table())
    ret= false;
  mysql_mutex_unlock(&thd->LOCK_thd_data);

DBUG_PRINT("wsrep", ("return: %d", ret));
  DBUG_RETURN(ret);
}

/*
  Called before the transaction is prepared.

Return zero on succes, non-zero on failure.
 */
static inline int wsrep_before_prepare(THD* thd, bool all)
{
  DBUG_ENTER("wsrep_before_prepare");
  WSREP_DEBUG("wsrep_before_prepare: %d", wsrep_is_real(thd, all));
  int ret= 0;
  DBUG_ASSERT(wsrep_run_commit_hook(thd, all));
  if ((ret= thd->wsrep_parallel_slave_wait_for_prior_commit()))
  {
    DBUG_RETURN(ret);
  }

if ((ret= thd->wsrep_cs().before_prepare()) == 0)
  {
    DBUG_ASSERT(!thd->wsrep_trx().ws_meta().gtid().is_undefined());
    /* Here we init xid with UUID and wsrep seqno. GTID is
       set to undefined because commit order is decided later
       in wsrep_before_commit(). wsrep_before_prepare() is
       executed out of order. */
    wsrep_xid_init(&thd->wsrep_xid,
                   thd->wsrep_trx().ws_meta().gtid(),
                   wsrep_gtid_server.undefined());
  }

mysql_mutex_lock(&thd->LOCK_thd_kill);
  if (thd->killed) wsrep_backup_kill_for_commit(thd);
  mysql_mutex_unlock(&thd->LOCK_thd_kill);

DBUG_RETURN(ret);
}

/*
  Called after the transaction has been prepared.

Return zero on succes, non-zero on failure.
 */
static inline int wsrep_after_prepare(THD* thd, bool all)
{
  DBUG_ENTER("wsrep_after_prepare");
  WSREP_DEBUG("wsrep_after_prepare: %d", wsrep_is_real(thd, all));
  DBUG_ASSERT(wsrep_run_commit_hook(thd, all));
  int ret= thd->wsrep_cs().after_prepare();
  DBUG_ASSERT(ret == 0 || thd->wsrep_cs().current_error() ||
              thd->wsrep_cs().transaction().state() == wsrep::transaction::s_must_replay);
  DBUG_RETURN(ret);
}

/*
  Called before the transaction is committed.

This function must be called from both client and
  applier contexts before commit.

Return zero on succes, non-zero on failure.
 */
static inline int wsrep_before_commit(THD* thd, bool all)
{
  DBUG_ENTER("wsrep_before_commit");
  WSREP_DEBUG("wsrep_before_commit: %d, %lld",
              wsrep_is_real(thd, all),
              (long long)wsrep_thd_trx_seqno(thd));
  int ret= 0;
  DBUG_ASSERT(wsrep_run_commit_hook(thd, all));
  if ((ret= thd->wsrep_cs().before_commit()) == 0)
  {
    DBUG_ASSERT(!thd->wsrep_trx().ws_meta().gtid().is_undefined());
    if (!thd->variables.gtid_seq_no && 
        (thd->wsrep_trx().ws_meta().flags() & wsrep::provider::flag::commit))
    {
        uint64 seqno= 0;
        if (thd->variables.wsrep_gtid_seq_no &&
            thd->variables.wsrep_gtid_seq_no > wsrep_gtid_server.seqno())
        {
          seqno= thd->variables.wsrep_gtid_seq_no;
          wsrep_gtid_server.seqno(thd->variables.wsrep_gtid_seq_no);
        }
        else
        {
          seqno= wsrep_gtid_server.seqno_inc();
        }
        thd->variables.wsrep_gtid_seq_no= 0;
        thd->wsrep_current_gtid_seqno= seqno;
        if (mysql_bin_log.is_open() && wsrep_gtid_mode)
        {
          thd->variables.gtid_seq_no= seqno;
          thd->variables.gtid_domain_id= wsrep_gtid_server.domain_id;
          thd->variables.server_id= wsrep_gtid_server.server_id;
        }
    }

wsrep_xid_init(&thd->wsrep_xid,
                   thd->wsrep_trx().ws_meta().gtid(),
                   wsrep_gtid_server.gtid());
    wsrep_register_for_group_commit(thd);
  }

mysql_mutex_lock(&thd->LOCK_thd_kill);
  if (thd->killed) wsrep_backup_kill_for_commit(thd);
  mysql_mutex_unlock(&thd->LOCK_thd_kill);

DBUG_RETURN(ret);
}

/*
  Called after the transaction has been ordered for commit.

This function must be called from both client and
  applier contexts after the commit has been ordered.

@param thd Pointer to THD
  @param all 
  @param err Error buffer in case of applying error

Return zero on succes, non-zero on failure.
 */
static inline int wsrep_ordered_commit(THD* thd, bool all)
{
  DBUG_ENTER("wsrep_ordered_commit");
  WSREP_DEBUG("wsrep_ordered_commit: %d %lld", wsrep_is_real(thd, all),
              (long long) wsrep_thd_trx_seqno(thd));
  DBUG_ASSERT(wsrep_run_commit_hook(thd, all));
  DBUG_RETURN(thd->wsrep_cs().ordered_commit());
}

/*
  Called after the transaction has been committed.

Return zero on succes, non-zero on failure.
 */
static inline int wsrep_after_commit(THD* thd, bool all)
{
  DBUG_ENTER("wsrep_after_commit");
  WSREP_DEBUG("wsrep_after_commit: %d, %d, %lld, %d",
              wsrep_is_real(thd, all),
              wsrep_is_active(thd),
              (long long)wsrep_thd_trx_seqno(thd),
              wsrep_has_changes(thd));
  DBUG_ASSERT(wsrep_run_commit_hook(thd, all));
  if (thd->internal_transaction())
    DBUG_RETURN(0);
  int ret= 0;
  if (thd->wsrep_trx().state() == wsrep::transaction::s_committing)
  {
    ret= thd->wsrep_cs().ordered_commit();
  }
  wsrep_unregister_from_group_commit(thd);
  thd->wsrep_xid.null();
  DBUG_RETURN(ret || thd->wsrep_cs().after_commit());
}

/*
  Called before the transaction is rolled back.

Return zero on succes, non-zero on failure.
 */
static inline int wsrep_before_rollback(THD* thd, bool all)
{
  DBUG_ENTER("wsrep_before_rollback");
  int ret= 0;
  if (wsrep_is_active(thd))
  {
    if (!all && thd->in_active_multi_stmt_transaction())
    {
      if (wsrep_emulate_bin_log)
      {
        wsrep_thd_binlog_stmt_rollback(thd);
      }

if (thd->wsrep_trx().is_streaming() &&
          (wsrep_fragments_certified_for_stmt(thd) > 0))
      {
        /* Non-safe statement rollback during SR multi statement
           transaction. A statement rollback is considered unsafe, if
           the same statement has already replicated one or more fragments.
           Self abort the transaction, the actual rollback and error
           handling will be done in after statement phase. */
        WSREP_DEBUG("statement rollback is not safe for streaming replication");
        wsrep_thd_self_abort(thd);
        ret= 0;
      }
    }
    else if (wsrep_is_real(thd, all) &&
             thd->wsrep_trx().state() != wsrep::transaction::s_aborted)
    {
      /* Real transaction rolling back and wsrep abort not completed
         yet */
      /* Reset XID so that it does not trigger writing serialization
         history in InnoDB. This needs to be avoided because rollback
         may happen out of order and replay may follow. */
      thd->wsrep_xid.null();
      ret= thd->wsrep_cs().before_rollback();
    }
  }
  DBUG_RETURN(ret);
}

/*
  Called after the transaction has been rolled back.

Return zero on succes, non-zero on failure.
 */
static inline int wsrep_after_rollback(THD* thd, bool all)
{
  DBUG_ENTER("wsrep_after_rollback");
  DBUG_RETURN((wsrep_is_real(thd, all) && wsrep_is_active(thd) &&
               thd->wsrep_cs().transaction().state() !=
               wsrep::transaction::s_aborted) ?
              thd->wsrep_cs().after_rollback() : 0);
}

static inline int wsrep_before_statement(THD* thd)
{
  return (thd->wsrep_cs().state() != wsrep::client_state::s_none &&
          !thd->internal_transaction() ?
	  thd->wsrep_cs().before_statement() : 0);
}

static inline
int wsrep_after_statement(THD* thd)
{
  DBUG_ENTER("wsrep_after_statement");
  int ret= ((thd->wsrep_cs().state() != wsrep::client_state::s_none &&
               thd->wsrep_cs().mode() == Wsrep_client_state::m_local) &&
              !thd->internal_transaction() ?
              thd->wsrep_cs().after_statement() : 0);

if (wsrep_is_active(thd))
  {
    mysql_mutex_lock(&thd->LOCK_thd_kill);
    wsrep_restore_kill_after_commit(thd);
    mysql_mutex_unlock(&thd->LOCK_thd_kill);
  }
  DBUG_RETURN(ret);
}

static inline void wsrep_after_apply(THD* thd)
{
  DBUG_ASSERT(wsrep_thd_is_applying(thd));
  WSREP_DEBUG("wsrep_after_apply %lld", thd->thread_id);
  if (!thd->internal_transaction())
    thd->wsrep_cs().after_applying();
}

static inline void wsrep_open(THD* thd)
{
  DBUG_ENTER("wsrep_open");
  if (WSREP_ON_)
  {
    /* WSREP_PROVIDER_EXISTS_ cannot be set if WSREP_ON_ is not set */
    DBUG_ASSERT(WSREP_PROVIDER_EXISTS_);
    thd->wsrep_cs().open(wsrep::client_id(thd->thread_id));
    thd->wsrep_cs().debug_log_level(wsrep_debug);
    if (!thd->wsrep_applier && thd->variables.wsrep_trx_fragment_size)
    {
      thd->wsrep_cs().enable_streaming(
        wsrep_fragment_unit(thd->variables.wsrep_trx_fragment_unit),
        size_t(thd->variables.wsrep_trx_fragment_size));
    }
  }
  DBUG_VOID_RETURN;
}

static inline void wsrep_close(THD* thd)
{
  DBUG_ENTER("wsrep_close");
  if (thd->wsrep_cs().state() != wsrep::client_state::s_none &&
      !thd->internal_transaction())
  {
    thd->wsrep_cs().close();
  }
  DBUG_VOID_RETURN;
}

static inline void wsrep_cleanup(THD* thd)
{
  DBUG_ENTER("wsrep_cleanup");
  if (thd->wsrep_cs().state() != wsrep::client_state::s_none)
  {
    thd->wsrep_cs().cleanup();
  }
  DBUG_VOID_RETURN;
}

static inline void
wsrep_wait_rollback_complete_and_acquire_ownership(THD *thd)
{
  DBUG_ENTER("wsrep_wait_rollback_complete_and_acquire_ownership");
  if (thd->wsrep_cs().state() != wsrep::client_state::s_none &&
      !thd->internal_transaction())
  {
    thd->wsrep_cs().wait_rollback_complete_and_acquire_ownership();
  }
  DBUG_VOID_RETURN;
}

static inline int wsrep_before_command(THD* thd, bool keep_command_error)
{
  return (thd->wsrep_cs().state() != wsrep::client_state::s_none &&
          !thd->internal_transaction() ?
          thd->wsrep_cs().before_command(keep_command_error) : 0);
}

static inline int wsrep_before_command(THD* thd)
{
  return wsrep_before_command(thd, false);
}

/*
  Called after each command.

Return zero on success, non-zero on failure.
*/
static inline void wsrep_after_command_before_result(THD* thd)
{
  if (thd->wsrep_cs().state() != wsrep::client_state::s_none &&
      !thd->internal_transaction())
  {
    thd->wsrep_cs().after_command_before_result();
  }
}

static inline void wsrep_after_command_after_result(THD* thd)
{
  if (thd->wsrep_cs().state() != wsrep::client_state::s_none &&
      !thd->internal_transaction())
  {
    thd->wsrep_cs().after_command_after_result();
  }
}

static inline void wsrep_after_command_ignore_result(THD* thd)
{
  wsrep_after_command_before_result(thd);
  DBUG_ASSERT(!thd->wsrep_cs().current_error());
  wsrep_after_command_after_result(thd);
}

static inline enum wsrep::client_error wsrep_current_error(THD* thd)
{
  return thd->wsrep_cs().current_error();
}

static inline enum wsrep::provider::status
wsrep_current_error_status(THD* thd)
{
  return thd->wsrep_cs().current_error_status();
}

#endif /* WSREP_TRANS_OBSERVER */

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