diff options
Diffstat (limited to 'sql/sp_cache.h')
| -rw-r--r-- | sql/sp_cache.h | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/sql/sp_cache.h b/sql/sp_cache.h index e9efe5b2a8c..5873c763289 100644 --- a/sql/sp_cache.h +++ b/sql/sp_cache.h @@ -22,6 +22,12 @@ #pragma interface /* gcc class implementation */ #endif +/* + Stored procedures/functions cache. This is used as follows: + * Each thread has its own cache. + * When SP is used it is always in some thread's cache. +*/ + class sp_head; class sp_cache; @@ -31,16 +37,20 @@ void sp_cache_init(); /* Clear the cache *cp and set *cp to NULL */ void sp_cache_clear(sp_cache **cp); -/* Insert an SP to cache. If 'cp' points to NULL, it's set to a new cache */ +/* Insert an SP into cache. If 'cp' points to NULL, it's set to a new cache */ void sp_cache_insert(sp_cache **cp, sp_head *sp); /* Lookup an SP in cache */ sp_head *sp_cache_lookup(sp_cache **cp, sp_name *name); -/* Remove an SP from cache. Returns true if something was removed */ +/* + Remove an SP from cache, and also bump the Cversion number so all other + caches are invalidated. + Returns true if something was removed. +*/ bool sp_cache_remove(sp_cache **cp, sp_name *name); -/* Invalidate a cache */ +/* Invalidate all existing SP caches by bumping Cversion number. */ void sp_cache_invalidate(); |