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Here comes a nasty patch, although I am not ready to push it yet. I will

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first pull, merge,test, and get it to work.

The main change is the new replication code - now we have two slave threads
SQL thread and I/O thread. I have also re-written a lot of the code to 
prepare for multi-master implementation. 

I also documented IO_CACHE quite extensively and to some extend, THD class.
This commit is contained in:
sasha@mysql.sashanet.com
2002-01-19 19:16:52 -07:00
parent f481272998
commit 56129ce634
39 changed files with 2464 additions and 1032 deletions
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11
sql/sql_class.cc
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@ -98,7 +98,6 @@ THD::THD():user_time(0),fatal_error(0),last_insert_id_used(0),
current_linfo = 0;
slave_thread = 0;
slave_proxy_id = 0;
log_seq = 0;
file_id = 0;
cond_count=0;
convert_set=0;
@ -119,6 +118,7 @@ THD::THD():user_time(0),fatal_error(0),last_insert_id_used(0),
where="field list";
server_id = ::server_id;
slave_net = 0;
log_pos = 0;
server_status=SERVER_STATUS_AUTOCOMMIT;
update_lock_default= low_priority_updates ? TL_WRITE_LOW_PRIORITY : TL_WRITE;
options=thd_startup_options;
@ -216,10 +216,11 @@ THD::~THD()
DBUG_VOID_RETURN;
}
void THD::prepare_to_die()
void THD::awake(bool prepare_to_die)
{
if (prepare_to_die)
killed = 1;
thr_alarm_kill(real_id);
killed = 1;
#ifdef SIGNAL_WITH_VIO_CLOSE
close_active_vio();
#endif
@ -228,6 +229,10 @@ void THD::prepare_to_die()
pthread_mutex_lock(&mysys_var->mutex);
if (!system_thread) // Don't abort locks
mysys_var->abort=1;
// this broadcast could be up in the air if the victim thread
// exits the cond in the time between read and broadcast, but that is
// ok since all we want to do is to make the victim thread get out
// of waiting on current_cond
if (mysys_var->current_cond)
{
pthread_mutex_lock(mysys_var->current_mutex);