diff options
Diffstat (limited to 'innobase/include/buf0buf.h')
| -rw-r--r-- | innobase/include/buf0buf.h | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/innobase/include/buf0buf.h b/innobase/include/buf0buf.h index d2ee1a440c7..0457da60534 100644 --- a/innobase/include/buf0buf.h +++ b/innobase/include/buf0buf.h @@ -626,19 +626,27 @@ buf_pool_get_nth_block( ulint i); /* in: index of the block */ /************************************************************************ Function which inits a page for read to the buffer buf_pool. If the page is -already in buf_pool, does nothing. Sets the io_fix flag to BUF_IO_READ and -sets a non-recursive exclusive lock on the buffer frame. The io-handler must -take care that the flag is cleared and the lock released later. This is one -of the functions which perform the state transition NOT_USED => FILE_PAGE to -a block (the other is buf_page_create). */ +(1) already in buf_pool, or +(2) if we specify to read only ibuf pages and the page is not an ibuf page, or +(3) if the space is deleted or being deleted, +then this function does nothing. +Sets the io_fix flag to BUF_IO_READ and sets a non-recursive exclusive lock +on the buffer frame. The io-handler must take care that the flag is cleared +and the lock released later. This is one of the functions which perform the +state transition NOT_USED => FILE_PAGE to a block (the other is +buf_page_create). */ buf_block_t* buf_page_init_for_read( /*===================*/ - /* out: pointer to the block */ - ulint mode, /* in: BUF_READ_IBUF_PAGES_ONLY, ... */ - ulint space, /* in: space id */ - ulint offset);/* in: page number */ + /* out: pointer to the block or NULL */ + ulint* err, /* out: DB_SUCCESS or DB_TABLESPACE_DELETED */ + ulint mode, /* in: BUF_READ_IBUF_PAGES_ONLY, ... */ + ulint space, /* in: space id */ + ib_longlong tablespace_version,/* in: prevents reading from a wrong + version of the tablespace in case we have done + DISCARD + IMPORT */ + ulint offset);/* in: page number */ /************************************************************************ Completes an asynchronous read or write request of a file page to or from the buffer pool. */ |