database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-11-22 17:44:29 +03:00
Code Activity

Merge istruewing@bk-internal.mysql.com:/home/bk/mysql-5.1-engines

Browse Source 
into  blade08.mysql.com:/data0/istruewing/autopush/mysql-5.1-bug25460
This commit is contained in:
unknown
2007-03-13 17:55:04 +01:00
parent 6095508b71 cc9f55767f
commit cf49765106
1 changed files with 6 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
storage/myisam/mi_extra.c
View File

@@ -350,11 +350,13 @@ int mi_extra(MI_INFO *info, enum ha_extra_function function, void *extra_arg)
#ifdef HAVE_MMAP
pthread_mutex_lock(&share->intern_lock);
/*
Memory map the data file if it is not already mapped and if there
are no other threads using this table. intern_lock prevents other
threads from starting to use the table while we are mapping it.
Memory map the data file if it is not already mapped. It is safe
to memory map a file while other threads are using file I/O on it.
Assigning a new address to a function pointer is an atomic
operation. intern_lock prevents that two or more mappings are done
at the same time.
*/
if (!share->file_map && (share->tot_locks == 1))
if (!share->file_map)
{
if (mi_dynmap_file(info, share->state.state.data_file_length))
{