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Commit 99744a9f authored by joreland@mysql.com's avatar joreland@mysql.com
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Merge joreland@bk-internal.mysql.com:/home/bk/mysql-4.1 

into  mysql.com:/home/jonas/src/mysql-4.1-push
parents 96272a6c ac6623f0
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Showing with 123 additions and 76 deletions
include/thr_lock.h
View file @ 99744a9f
......@@ -111,7 +111,7 @@ void thr_unlock(THR_LOCK_DATA *data);
int thr_multi_lock(THR_LOCK_DATA **data,uint count);
void thr_multi_unlock(THR_LOCK_DATA **data,uint count);
void thr_abort_locks(THR_LOCK *lock);
void thr_abort_locks_for_thread(THR_LOCK *lock, pthread_t thread);
bool thr_abort_locks_for_thread(THR_LOCK *lock, pthread_t thread);
void thr_print_locks(void); /* For debugging */
my_bool thr_upgrade_write_delay_lock(THR_LOCK_DATA *data);
my_bool thr_reschedule_write_lock(THR_LOCK_DATA *data);
......
mysys/thr_lock.c
View file @ 99744a9f
......@@ -966,9 +966,10 @@ void thr_abort_locks(THR_LOCK *lock)
This is used to abort all locks for a specific thread
*/
void thr_abort_locks_for_thread(THR_LOCK *lock, pthread_t thread)
bool thr_abort_locks_for_thread(THR_LOCK *lock, pthread_t thread)
{
THR_LOCK_DATA *data;
bool found= FALSE;
DBUG_ENTER("thr_abort_locks_for_thread");
pthread_mutex_lock(&lock->mutex);
......@@ -978,6 +979,7 @@ void thr_abort_locks_for_thread(THR_LOCK *lock, pthread_t thread)
{
DBUG_PRINT("info",("Aborting read-wait lock"));
data->type= TL_UNLOCK; /* Mark killed */
found= TRUE;
pthread_cond_signal(data->cond);
data->cond= 0; /* Removed from list */
......@@ -993,6 +995,7 @@ void thr_abort_locks_for_thread(THR_LOCK *lock, pthread_t thread)
{
DBUG_PRINT("info",("Aborting write-wait lock"));
data->type= TL_UNLOCK;
found= TRUE;
pthread_cond_signal(data->cond);
data->cond= 0;
......@@ -1003,7 +1006,7 @@ void thr_abort_locks_for_thread(THR_LOCK *lock, pthread_t thread)
}
}
pthread_mutex_unlock(&lock->mutex);
DBUG_VOID_RETURN;
DBUG_RETURN(found);
}
......
sql/handler.cc
View file @ 99744a9f
......@@ -1514,6 +1514,8 @@ int ha_discover(THD *thd, const char *db, const char *name,
int error= -1; // Table does not exist in any handler
DBUG_ENTER("ha_discover");
DBUG_PRINT("enter", ("db: %s, name: %s", db, name));
if (is_prefix(name,tmp_file_prefix)) /* skip temporary tables */
DBUG_RETURN(error);
#ifdef HAVE_NDBCLUSTER_DB
if (have_ndbcluster == SHOW_OPTION_YES)
error= ndbcluster_discover(thd, db, name, frmblob, frmlen);
......
sql/lock.cc
View file @ 99744a9f
......@@ -337,20 +337,25 @@ void mysql_lock_abort(THD *thd, TABLE *table)
/* Abort one thread / table combination */
void mysql_lock_abort_for_thread(THD *thd, TABLE *table)
bool mysql_lock_abort_for_thread(THD *thd, TABLE *table)
{
MYSQL_LOCK *locked;
TABLE *write_lock_used;
bool result= FALSE;
DBUG_ENTER("mysql_lock_abort_for_thread");
if ((locked = get_lock_data(thd,&table,1,1,&write_lock_used)))
{
for (uint i=0; i < locked->lock_count; i++)
thr_abort_locks_for_thread(locked->locks[i]->lock,
table->in_use->real_id);
{
bool found;
found= thr_abort_locks_for_thread(locked->locks[i]->lock,
table->in_use->real_id);
result|= found;
}
my_free((gptr) locked,MYF(0));
}
DBUG_VOID_RETURN;
DBUG_RETURN(result);
}
......@@ -578,8 +583,14 @@ int lock_table_name(THD *thd, TABLE_LIST *table_list)
my_free((gptr) table,MYF(0));
DBUG_RETURN(-1);
}
if (remove_table_from_cache(thd, db, table_list->real_name))
DBUG_RETURN(1); // Table is in use
{
if (remove_table_from_cache(thd, db,
table_list->real_name, RTFC_NO_FLAG))
{
DBUG_RETURN(1); // Table is in use
}
}
DBUG_RETURN(0);
}
......
sql/mysql_priv.h
View file @ 99744a9f
......@@ -763,8 +763,12 @@ bool rename_temporary_table(THD* thd, TABLE *table, const char *new_db,
const char *table_name);
void remove_db_from_cache(const char *db);
void flush_tables();
#define RTFC_NO_FLAG 0x0000
#define RTFC_OWNED_BY_THD_FLAG 0x0001
#define RTFC_WAIT_OTHER_THREAD_FLAG 0x0002
#define RTFC_CHECK_KILLED_FLAG 0x0004
bool remove_table_from_cache(THD *thd, const char *db, const char *table,
bool return_if_owned_by_thd=0);
uint flags);
bool close_cached_tables(THD *thd, bool wait_for_refresh, TABLE_LIST *tables);
void copy_field_from_tmp_record(Field *field,int offset);
int fill_record(List<Item> &fields,List<Item> &values, bool ignore_errors);
......@@ -1000,7 +1004,7 @@ void mysql_unlock_read_tables(THD *thd, MYSQL_LOCK *sql_lock);
void mysql_unlock_some_tables(THD *thd, TABLE **table,uint count);
void mysql_lock_remove(THD *thd, MYSQL_LOCK *locked,TABLE *table);
void mysql_lock_abort(THD *thd, TABLE *table);
void mysql_lock_abort_for_thread(THD *thd, TABLE *table);
bool mysql_lock_abort_for_thread(THD *thd, TABLE *table);
MYSQL_LOCK *mysql_lock_merge(MYSQL_LOCK *a,MYSQL_LOCK *b);
bool lock_global_read_lock(THD *thd);
void unlock_global_read_lock(THD *thd);
......
sql/sql_base.cc
View file @ 99744a9f
......@@ -284,7 +284,8 @@ bool close_cached_tables(THD *thd, bool if_wait_for_refresh,
bool found=0;
for (TABLE_LIST *table=tables ; table ; table=table->next)
{
if (remove_table_from_cache(thd, table->db, table->real_name, 1))
if (remove_table_from_cache(thd, table->db, table->real_name,
RTFC_OWNED_BY_THD_FLAG))
found=1;
}
if (!found)
......@@ -2933,62 +2934,99 @@ void flush_tables()
*/
bool remove_table_from_cache(THD *thd, const char *db, const char *table_name,
bool return_if_owned_by_thd)
uint flags)
{
char key[MAX_DBKEY_LENGTH];
uint key_length;
TABLE *table;
bool result=0;
bool result=0, signalled= 0;
DBUG_ENTER("remove_table_from_cache");
key_length=(uint) (strmov(strmov(key,db)+1,table_name)-key)+1;
for (table=(TABLE*) hash_search(&open_cache,(byte*) key,key_length) ;
table;
table = (TABLE*) hash_next(&open_cache,(byte*) key,key_length))
for (;;)
{
THD *in_use;
table->version=0L; /* Free when thread is ready */
if (!(in_use=table->in_use))
{
DBUG_PRINT("info",("Table was not in use"));
relink_unused(table);
}
else if (in_use != thd)
result= signalled= 0;
for (table=(TABLE*) hash_search(&open_cache,(byte*) key,key_length) ;
table;
table = (TABLE*) hash_next(&open_cache,(byte*) key,key_length))
{
in_use->some_tables_deleted=1;
if (table->db_stat)
result=1;
/* Kill delayed insert threads */
if ((in_use->system_thread & SYSTEM_THREAD_DELAYED_INSERT) &&
! in_use->killed)
THD *in_use;
table->version=0L; /* Free when thread is ready */
if (!(in_use=table->in_use))
{
in_use->killed=1;
pthread_mutex_lock(&in_use->mysys_var->mutex);
if (in_use->mysys_var->current_cond)
{
pthread_mutex_lock(in_use->mysys_var->current_mutex);
pthread_cond_broadcast(in_use->mysys_var->current_cond);
pthread_mutex_unlock(in_use->mysys_var->current_mutex);
}
pthread_mutex_unlock(&in_use->mysys_var->mutex);
DBUG_PRINT("info",("Table was not in use"));
relink_unused(table);
}
/*
Now we must abort all tables locks used by this thread
as the thread may be waiting to get a lock for another table
*/
for (TABLE *thd_table= in_use->open_tables;
thd_table ;
thd_table= thd_table->next)
else if (in_use != thd)
{
in_use->some_tables_deleted=1;
if (table->db_stat)
result=1;
/* Kill delayed insert threads */
if ((in_use->system_thread & SYSTEM_THREAD_DELAYED_INSERT) &&
! in_use->killed)
{
in_use->killed=1;
pthread_mutex_lock(&in_use->mysys_var->mutex);
if (in_use->mysys_var->current_cond)
{
pthread_mutex_lock(in_use->mysys_var->current_mutex);
signalled= 1;
pthread_cond_broadcast(in_use->mysys_var->current_cond);
pthread_mutex_unlock(in_use->mysys_var->current_mutex);
}
pthread_mutex_unlock(&in_use->mysys_var->mutex);
}
/*
Now we must abort all tables locks used by this thread
as the thread may be waiting to get a lock for another table
*/
for (TABLE *thd_table= in_use->open_tables;
thd_table ;
thd_table= thd_table->next)
{
if (thd_table->db_stat) // If table is open
signalled|= mysql_lock_abort_for_thread(thd, thd_table);
}
}
else
result= result || (flags & RTFC_OWNED_BY_THD_FLAG);
}
while (unused_tables && !unused_tables->version)
VOID(hash_delete(&open_cache,(byte*) unused_tables));
if (result && (flags & RTFC_WAIT_OTHER_THREAD_FLAG))
{
if (!(flags & RTFC_CHECK_KILLED_FLAG) || !thd->killed)
{
if (thd_table->db_stat) // If table is open
mysql_lock_abort_for_thread(thd, thd_table);
if (likely(signalled))
{
dropping_tables++;
(void) pthread_cond_wait(&COND_refresh, &LOCK_open);
dropping_tables--;
continue;
}
else
{
/*
It can happen that another thread has opened the
table but has not yet locked any table at all. Since
it can be locked waiting for a table that our thread
has done LOCK TABLE x WRITE on previously, we need to
ensure that the thread actually hears our signal
before we go to sleep. Thus we wait for a short time
and then we retry another loop in the
remove_table_from_cache routine.
*/
pthread_mutex_unlock(&LOCK_open);
my_sleep(10);
pthread_mutex_lock(&LOCK_open);
continue;
}
}
}
else
result= result || return_if_owned_by_thd;
break;
}
while (unused_tables && !unused_tables->version)
VOID(hash_delete(&open_cache,(byte*) unused_tables));
DBUG_RETURN(result);
}
......
sql/sql_table.cc
View file @ 99744a9f
......@@ -220,6 +220,7 @@ int mysql_rm_table_part2(THD *thd, TABLE_LIST *tables, bool if_exists,
for (table=tables ; table ; table=table->next)
{
char *db=table->db;
uint flags;
mysql_ha_flush(thd, table, MYSQL_HA_CLOSE_FINAL);
if (!close_temporary_table(thd, db, table->real_name))
{
......@@ -231,12 +232,8 @@ int mysql_rm_table_part2(THD *thd, TABLE_LIST *tables, bool if_exists,
if (!drop_temporary)
{
abort_locked_tables(thd,db,table->real_name);
while (remove_table_from_cache(thd,db,table->real_name) && !thd->killed)
{
dropping_tables++;
(void) pthread_cond_wait(&COND_refresh,&LOCK_open);
dropping_tables--;
}
flags= RTFC_WAIT_OTHER_THREAD_FLAG | RTFC_CHECK_KILLED_FLAG;
remove_table_from_cache(thd,db,table->real_name,flags);
drop_locked_tables(thd,db,table->real_name);
if (thd->killed)
DBUG_RETURN(-1);
......@@ -1661,13 +1658,8 @@ static void wait_while_table_is_used(THD *thd,TABLE *table,
mysql_lock_abort(thd, table); // end threads waiting on lock
/* Wait until all there are no other threads that has this table open */
while (remove_table_from_cache(thd,table->table_cache_key,
table->real_name))
{
dropping_tables++;
(void) pthread_cond_wait(&COND_refresh,&LOCK_open);
dropping_tables--;
}
remove_table_from_cache(thd,table->table_cache_key,
table->real_name, RTFC_WAIT_OTHER_THREAD_FLAG);
DBUG_VOID_RETURN;
}
......@@ -1989,18 +1981,14 @@ static int mysql_admin_table(THD* thd, TABLE_LIST* tables,
/* Close all instances of the table to allow repair to rename files */
if (lock_type == TL_WRITE && table->table->version)
{
uint flags;
pthread_mutex_lock(&LOCK_open);
const char *old_message=thd->enter_cond(&COND_refresh, &LOCK_open,
"Waiting to get writelock");
mysql_lock_abort(thd,table->table);
while (remove_table_from_cache(thd, table->table->table_cache_key,
table->table->real_name) &&
! thd->killed)
{
dropping_tables++;
(void) pthread_cond_wait(&COND_refresh,&LOCK_open);
dropping_tables--;
}
flags= RTFC_WAIT_OTHER_THREAD_FLAG | RTFC_CHECK_KILLED_FLAG;
remove_table_from_cache(thd, table->table->table_cache_key,
table->table->real_name, flags);
thd->exit_cond(old_message);
if (thd->killed)
goto err;
......@@ -2123,7 +2111,7 @@ send_result_message:
{
pthread_mutex_lock(&LOCK_open);
remove_table_from_cache(thd, table->table->table_cache_key,
table->table->real_name);
table->table->real_name, RTFC_NO_FLAG);
pthread_mutex_unlock(&LOCK_open);
/* May be something modified consequently we have to invalidate cache */
query_cache_invalidate3(thd, table->table, 0);
......@@ -3418,7 +3406,8 @@ int mysql_alter_table(THD *thd,char *new_db, char *new_name,
if (table)
{
VOID(table->file->extra(HA_EXTRA_FORCE_REOPEN)); // Use new file
remove_table_from_cache(thd,db,table_name); // Mark all in-use copies old
remove_table_from_cache(thd,db,table_name,RTFC_NO_FLAG);
// Mark in-use copies old
mysql_lock_abort(thd,table); // end threads waiting on lock
}
VOID(quick_rm_table(old_db_type,db,old_name));
......
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