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| author | Konstantin Osipov <kostja@sun.com> | 2009-12-02 19:31:57 +0300 |
|---|---|---|
| committer | Konstantin Osipov <kostja@sun.com> | 2009-12-02 19:31:57 +0300 |
| commit | edddfa0ef45332973e59066ef94075134f48a7ee (patch) | |
| tree | c7cd519ccaa3357e48161f2c078f2e22c00d2e56 /sql/mdl.h | |
| parent | 0a49fd92d90843f9cd49f98bb23a513b3f82b1b9 (diff) | |
| download | mariadb-git-edddfa0ef45332973e59066ef94075134f48a7ee.tar.gz | |
Backport of:
------------------------------------------------------------
revno: 2630.4.33
committer: Dmitry Lenev <dlenev@mysql.com>
branch nick: mysql-6.0-3726-w2
timestamp: Fri 2008-06-20 17:11:20 +0400
message:
WL#3726 "DDL locking for all metadata objects".
After-review fixes in progress.
Minimized dependency of mdl.cc on other modules (particularly
made it independant of mysql_priv.h) in order to be able
write unit tests for metadata locking subsystem.
Diffstat (limited to 'sql/mdl.h')
| -rw-r--r-- | sql/mdl.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/sql/mdl.h b/sql/mdl.h index 92bd83038e5..b4b84a9ab24 100644 --- a/sql/mdl.h +++ b/sql/mdl.h @@ -19,6 +19,7 @@ #include "sql_plist.h" #include <my_sys.h> #include <m_string.h> +#include <mysql_com.h> class THD; @@ -148,6 +149,9 @@ void mdl_context_backup_and_reset(MDL_CONTEXT *ctx, MDL_CONTEXT *backup); void mdl_context_restore(MDL_CONTEXT *ctx, MDL_CONTEXT *backup); void mdl_context_merge(MDL_CONTEXT *target, MDL_CONTEXT *source); +/** Maximal length of key for metadata locking subsystem. */ +#define MAX_MDLKEY_LENGTH (4 + NAME_LEN + 1 + NAME_LEN + 1) + void mdl_init_lock(MDL_LOCK_DATA *lock_data, char *key, int type, const char *db, const char *name); MDL_LOCK_DATA *mdl_alloc_lock(int type, const char *db, const char *name, @@ -237,4 +241,19 @@ void* mdl_get_cached_object(MDL_LOCK_DATA *lock_data); void mdl_set_cached_object(MDL_LOCK_DATA *lock_data, void *cached_object, mdl_cached_object_release_hook release_hook); + +/* + Functions in the server's kernel used by metadata locking subsystem. +*/ + +extern bool mysql_notify_thread_having_shared_lock(THD *thd, THD *in_use); +extern void mysql_ha_flush(THD *thd); +extern "C" const char *set_thd_proc_info(THD *thd, const char *info, + const char *calling_function, + const char *calling_file, + const unsigned int calling_line); +#ifndef DBUG_OFF +extern pthread_mutex_t LOCK_open; +#endif + #endif |