diff options
Diffstat (limited to 'myisam/mi_locking.c')
| -rw-r--r-- | myisam/mi_locking.c | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/myisam/mi_locking.c b/myisam/mi_locking.c index 22772a3dd2e..18daebffa85 100644 --- a/myisam/mi_locking.c +++ b/myisam/mi_locking.c @@ -35,6 +35,7 @@ int mi_lock_database(MI_INFO *info, int lock_type) MYISAM_SHARE *share=info->s; uint flag; DBUG_ENTER("mi_lock_database"); + DBUG_PRINT("info",("lock_type: %d", lock_type)); if (share->options & HA_OPTION_READ_ONLY_DATA || info->lock_type == lock_type) @@ -53,6 +54,7 @@ int mi_lock_database(MI_INFO *info, int lock_type) { switch (lock_type) { case F_UNLCK: + DBUG_PRINT("info", ("old lock: %d", info->lock_type)); if (info->lock_type == F_RDLCK) count= --share->r_locks; else @@ -106,19 +108,22 @@ int mi_lock_database(MI_INFO *info, int lock_type) if (error) mi_mark_crashed(info); } - if (share->r_locks) - { /* Only read locks left */ - flag=1; - if (my_lock(share->kfile,F_RDLCK,0L,F_TO_EOF, - MYF(MY_WME | MY_SEEK_NOT_DONE)) && !error) - error=my_errno; - } - else if (!share->w_locks) - { /* No more locks */ - flag=1; - if (my_lock(share->kfile,F_UNLCK,0L,F_TO_EOF, - MYF(MY_WME | MY_SEEK_NOT_DONE)) && !error) - error=my_errno; + if (info->lock_type != F_EXTRA_LCK) + { + if (share->r_locks) + { /* Only read locks left */ + flag=1; + if (my_lock(share->kfile,F_RDLCK,0L,F_TO_EOF, + MYF(MY_WME | MY_SEEK_NOT_DONE)) && !error) + error=my_errno; + } + else if (!share->w_locks) + { /* No more locks */ + flag=1; + if (my_lock(share->kfile,F_UNLCK,0L,F_TO_EOF, + MYF(MY_WME | MY_SEEK_NOT_DONE)) && !error) + error=my_errno; + } } } info->opt_flag&= ~(READ_CACHE_USED | WRITE_CACHE_USED); |