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tc_remove_all_unused_tables() cleanup

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As tc_purge() never marks share flushed, let tdc_remove_table() do it
directly.

Part of MDEV-17882 - Cleanup refresh version
This commit is contained in:
Sergey Vojtovich 2019-12-18 15:02:55 +04:00
parent 14e1385691
commit 06fae75859
1 changed files with 11 additions and 31 deletions
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42
sql/table_cache.cc
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@ -260,25 +260,12 @@ static void tc_remove_table(TABLE *table)
static void tc_remove_all_unused_tables(TDC_element *element,
Share_free_tables::List *purge_tables,
bool mark_flushed)
Share_free_tables::List *purge_tables)
{
TABLE *table;
/*
Mark share flushed in order to ensure that it gets
automatically deleted once it is no longer referenced.
Note that code in TABLE_SHARE::wait_for_old_version() assumes that
marking share flushed is followed by purge of unused table
shares.
*/
if (mark_flushed)
element->flushed= true;
for (uint32 i= 0; i < tc_instances; i++)
{
mysql_mutex_lock(&tc[i].LOCK_table_cache);
while ((table= element->free_tables[i].list.pop_front()))
while (auto table= element->free_tables[i].list.pop_front())
{
tc[i].records--;
tc[i].free_tables.remove(table);
@ -306,17 +293,11 @@ static void tc_remove_all_unused_tables(TDC_element *element,
periodicly flush all not used tables.
*/
struct tc_purge_arg
{
Share_free_tables::List purge_tables;
bool mark_flushed;
};
static my_bool tc_purge_callback(TDC_element *element, tc_purge_arg *arg)
static my_bool tc_purge_callback(TDC_element *element,
Share_free_tables::List *purge_tables)
{
mysql_mutex_lock(&element->LOCK_table_share);
tc_remove_all_unused_tables(element, &arg->purge_tables, arg->mark_flushed);
tc_remove_all_unused_tables(element, purge_tables);
mysql_mutex_unlock(&element->LOCK_table_share);
return FALSE;
}
@ -324,12 +305,10 @@ static my_bool tc_purge_callback(TDC_element *element, tc_purge_arg *arg)
void tc_purge()
{
tc_purge_arg argument;
TABLE *table;
Share_free_tables::List purge_tables;
argument.mark_flushed= false;
tdc_iterate(0, (my_hash_walk_action) tc_purge_callback, &argument);
while ((table= argument.purge_tables.pop_front()))
tdc_iterate(0, (my_hash_walk_action) tc_purge_callback, &purge_tables);
while (auto table= purge_tables.pop_front())
intern_close_table(table);
}
@ -1096,9 +1075,10 @@ bool tdc_remove_table(THD *thd, enum_tdc_remove_table_type remove_type,
mysql_mutex_unlock(&LOCK_unused_shares);
element->ref_count++;
if (remove_type != TDC_RT_REMOVE_NOT_OWN_KEEP_SHARE)
element->flushed= true;
tc_remove_all_unused_tables(element, &purge_tables,
remove_type != TDC_RT_REMOVE_NOT_OWN_KEEP_SHARE);
tc_remove_all_unused_tables(element, &purge_tables);
if (remove_type == TDC_RT_REMOVE_NOT_OWN ||
remove_type == TDC_RT_REMOVE_NOT_OWN_KEEP_SHARE)