diff options
Diffstat (limited to 'storage/xtradb/include/buf0buf.ic')
| -rw-r--r-- | storage/xtradb/include/buf0buf.ic | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/storage/xtradb/include/buf0buf.ic b/storage/xtradb/include/buf0buf.ic index 98d575075ba..55d89b66375 100644 --- a/storage/xtradb/include/buf0buf.ic +++ b/storage/xtradb/include/buf0buf.ic @@ -444,6 +444,7 @@ buf_page_get_io_fix( case BUF_IO_NONE: case BUF_IO_READ: case BUF_IO_WRITE: + case BUF_IO_PIN: return(io_fix); } ut_error; @@ -494,6 +495,49 @@ buf_block_set_io_fix( buf_page_set_io_fix(&block->page, io_fix); } +/*********************************************************************//** +Makes a block sticky. A sticky block implies that even after we release +the buf_pool->mutex and the block->mutex: +* it cannot be removed from the flush_list +* the block descriptor cannot be relocated +* it cannot be removed from the LRU list +Note that: +* the block can still change its position in the LRU list +* the next and previous pointers can change. */ +UNIV_INLINE +void +buf_page_set_sticky( +/*================*/ + buf_page_t* bpage) /*!< in/out: control block */ +{ +#ifdef UNIV_DEBUG + buf_pool_t* buf_pool = buf_pool_from_bpage(bpage); + ut_ad(mutex_own(&buf_pool->LRU_list_mutex)); +#endif + ut_ad(mutex_own(buf_page_get_mutex(bpage))); + ut_ad(buf_page_get_io_fix(bpage) == BUF_IO_NONE); + + bpage->io_fix = BUF_IO_PIN; +} + +/*********************************************************************//** +Removes stickiness of a block. */ +UNIV_INLINE +void +buf_page_unset_sticky( +/*==================*/ + buf_page_t* bpage) /*!< in/out: control block */ +{ +#ifdef UNIV_DEBUG + buf_pool_t* buf_pool = buf_pool_from_bpage(bpage); + ut_ad(mutex_own(&buf_pool->LRU_list_mutex)); +#endif + ut_ad(mutex_own(buf_page_get_mutex(bpage))); + ut_ad(buf_page_get_io_fix(bpage) == BUF_IO_PIN); + + bpage->io_fix = BUF_IO_NONE; +} + /********************************************************************//** Determine if a buffer block can be relocated in memory. The block can be dirty, but it must not be I/O-fixed or bufferfixed. */ |