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Merge bodhi.(none):/opt/local/work/mysql-5.0-runtime

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into  bodhi.(none):/opt/local/work/mysql-5.1-runtime
This commit is contained in:
kostja@bodhi.(none)
2007-07-31 20:00:05 +04:00
parent be83a97fa6 80b48aea43
commit 4b0bf30008
7 changed files with 178 additions and 22 deletions
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30
sql/lock.cc
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@ -244,7 +244,8 @@ MYSQL_LOCK *mysql_lock_tables(THD *thd, TABLE **tables, uint count,
thd->proc_info="System lock";
DBUG_PRINT("info", ("thd->proc_info %s", thd->proc_info));
if (lock_external(thd, tables, count))
if (sql_lock->table_count && lock_external(thd, sql_lock->table,
sql_lock->table_count))
{
/* Clear the lock type of all lock data to avoid reusage. */
reset_lock_data(sql_lock);
@ -340,6 +341,7 @@ static int lock_external(THD *thd, TABLE **tables, uint count)
((*tables)->reginfo.lock_type >= TL_READ &&
(*tables)->reginfo.lock_type <= TL_READ_NO_INSERT))
lock_type=F_RDLCK;
if ((error=(*tables)->file->ha_external_lock(thd,lock_type)))
{
print_lock_error(error, (*tables)->file->table_type());
@ -447,10 +449,28 @@ void mysql_unlock_read_tables(THD *thd, MYSQL_LOCK *sql_lock)
}
/**
Try to find the table in the list of locked tables.
In case of success, unlock the table and remove it from this list.
void mysql_lock_remove(THD *thd, MYSQL_LOCK *locked,TABLE *table)
@note This function has a legacy side effect: the table is
unlocked even if it is not found in the locked list.
It's not clear if this side effect is intentional or still
desirable. It might lead to unmatched calls to
unlock_external(). Moreover, a discrepancy can be left
unnoticed by the storage engine, because in
unlock_external() we call handler::external_lock(F_UNLCK) only
if table->current_lock is not F_UNLCK.
@param always_unlock specify explicitly if the legacy side
effect is desired.
*/
void mysql_lock_remove(THD *thd, MYSQL_LOCK *locked,TABLE *table,
bool always_unlock)
{
mysql_unlock_some_tables(thd, &table,1);
if (always_unlock == TRUE)
mysql_unlock_some_tables(thd, &table, /* table count */ 1);
if (locked)
{
reg1 uint i;
@ -464,6 +484,10 @@ void mysql_lock_remove(THD *thd, MYSQL_LOCK *locked,TABLE *table)
DBUG_ASSERT(table->lock_position == i);
/* Unlock if not yet unlocked */
if (always_unlock == FALSE)
mysql_unlock_some_tables(thd, &table, /* table count */ 1);
/* Decrement table_count in advance, making below expressions easier */
old_tables= --locked->table_count;